@kingofspain18077 This is exactly how a diesel engine works. Air is pulled inside the cylinder, and the piston then moves up compressing the air inside causing it to heat up. The only difference is the fuel is misted in towards the end.
@@aland7236 Things I learnt in thermo is that higher the pressure lesser will the volume lesser the volume higher will be the temperature higher the temperature heat production will increase
@@couchpotatoes5158 on the contrary, compression ignition is diesel mechanic 101. Even if a diesel mechanic did fit the flawed stereotype of a knuckle dragging oaf they’d still understand how and why.
@@couchpotatoes5158we are mechanics because the science of how things work interests us and we like to fix things. Any decent mechanic understands what they are working on and how it operates and the principles on how it operates. We literally diag shit all day long with no compression. Why would we test for compression if we didn't understand why it's important?
@@evandrewmartinez1 because “mekanic stoopid”. Couchpotatoes is a someone who’s had the term “gay-lussac’s gas law” copied onto his clipboard for a while now I think
If mechanics were stupid then why in the sam hell can’t the folks who shit on them all the time live without them? Real fuckin’ goofy of those folks to bite the hand that makes sure they can drive to get to the hand that feeds them. Appreciate mechanics y’all. They’ve probably helped you in ways you cannot imagine or would ever realize.
To be more specific, it’s a diesel engine that ignites it’s fuel using compression. Ignition from compression in a gasoline engine is a bad thing and can usually be resolved by switching to a high octane fuel
@@pedrourbano501 that is not at all correct. Not even a little bit other than the part about diesel fuel being an oil. The viscosity has nothing to do with compression ignition
It is an adiabatic process, in which heat transfer is 0 and all work done on the gas is used to increase Internal energy of gas and thus the temperature of gas also rises. dQ = dW + dU, In adiabatic process, -dW = dU dU = n•Cv• dT
I had to convince an officer and a chief on my ship not to replace the nitrogen in our gun recoil system with just regular air. We had run out and the system needs recharging every so often. I felt super proud of myself for possibly saving my ship from a major explosion lol. No idea if the pressures got up that high or not, but I figured we used nitrogen for a reason.
@@crd-nz_001 Well, the pressure would've ignited the oxygen. The oil too, of course. I called up one of my old 5 inch tech buddies and they confirmed this.
@@hanif7592 Cruiser and yes. There's no barrier between the gun and the loader room where the drum is. You can climb up into the gun shield for maintenance. It has a net that slides closed which is locked by a key that goes into the power distribution panel. In theory, you couldn't be up there while it had power for safety reasons.
I remember many years ago in the early days of youtube, around the time google bought it, a lot of camping and survival channels were showing things like this as a method of starting a campfire
Yeah, I remember that. lol. One channel even made a documentary about some tribe in south east asia who've been using bamboo piston fire starters for (presumably) thousands of years. Clever alternative to flint or fire-bow.
also how air conditioning works. Compressor does exactly what it was named for and then the evaporator expands the refrigerant to cool it. We've really come a long way with technology.
Fun fact, if you don't mind it massively wearing out everything really quickly, you can use this to get WAY more velocity/power out of a spring-piston air rifle. Put a little vaseline into the base of the pellets and it'll "diesel" it, turning it from an air rifle into an actual FIREarm at the expense of blowing out most of the gaskets and wearing out the barrel in only a handful of shots.
Came to comment this same thing. However I can confirm that if you don’t add too much oil or Vaseline you can still get quite a bit of extra velocity without destroying the seals right away. I’ve fired easily a couple hundred dieseled pellets and the gun still works great.
@@maukaman I used to put Hoppe's lube oil on the o-ring. A light film is enough, but I noticed that a drop or two would make the next few shots crack like a .22 if I gave it more than 3-4 pumps. Accuracy was garbage tho!
@@Sam-us1he I love (okay, not really) when "scientists" on TH-cam pretend to be amazed by shit we've been doing for a hundred years like they invented something.
@@sarcasticguy4311 Most of them probably aren't pretending. People with a scientific mind and a sense of wonder for the natural world are much less likely to get tired of seeing these things than other people. There are things I've seen a thousand times that I still stare at in awe every time because it's just that cool to me. Even something as simple as a blue sky or green plants. The more you know about how all of these things work and why they are the way they are, the harder it is to take them for granted, at least in my experience.
My uncle made a survival tool in the 80's on this principle. It's only feasible in extremely cold or wet areas (Think Sibera and arctic cyclones). Got enough money from 1 invention to care for his whole extended family to this day
Yep, in Malay culture/tradition this was a equipment they use for fire starter which made from wood & steel around the 17 centuries. I used it few times when i was a kid but nowadays people just use lighter
@fieryr Depends on a lot of factors. A planned trip and both options are equally viable, so let's look at SHTF scenarios. Would the person recognize flint or one of the other stones that will spark off of carbon steel (since stainless won't work)? Are they in an area with flint? Most knives anymore are made of stainless steel, so it's unlikely most folks would have a carbon steel knife unless they specifically selected it. Since stainless won't spark, its unlikely a person would have the right materials unless they carry a SHTF kit all the time. A fire piston can be made in the field with natural materials, but the skillset takes practice, so it's not something that somebody can just watch a vid and then hope to pull it off. I personally don't depend on the fire piston but I won't write it off. I carry multiple fire-starting options every day for that reason.
Creo que esto también sucede con algunos combustibles de automoviles. Cuando vayas a recargar, revisa el octanage y fijate si es menor o mayor al de tu auto. Si es mayor, no hay problema, el combustible se encendera con la mecha como lo hace normalmente. Si es menor lo que pasara es que el combustible se quemara por la presión antes de que la mecha siquiera pueda encenderse, lo cual podría romperte el motor a largo plazo. No lo pongo en inglés porque es tarde y me costaría pensar, mas que no sé hablar ni escribir en inglés tan bien. Estoy aprendiendo así que algún día compartiré mis opiniones en su idioma para que les sea más fácil leerlos. Un saludo a quien haya leido esto, nos vemos.
"Fire Pistons" have been a staple in Bushcraft for thousands of years. You can still buy them on the internet, and use them to start campfires with nothing but a bit of tinder made to smoulder via compression. Plenty of TH-cams about them.
To everybody saying this is how diesels work, NO SHITE SHERLOCK!! He said in the video "internal combustion engine" meaning BOTH Diesel and Petrol engines use this method, petrol cars just have an extra step with a spark plug. Other than that, there's no difference.
This kind of thing was tought to me as a child decades ago. It is called a fire piston and works amazing, especially if you put some charcloth in there; the pressure required to get charcloth to ignite is much lower and will create a burning ember much easier. All we used was a piece of copper pipe with a whittled piston made from a branch and made to snuggly fit into the cylinder but not get stuck. You put the charcloth and other dry combustibles into the bottom of the cylinder, place the whittled piston in the copper pipe cylinder and slam down, as in the video. Make sure to hold the piston inside the cylinder when you do this or your piston will launch from the cylinder, kind of like a mortar round. Your tinder/charcloth will be burning and can be dumped into a tinder bundle and then fire is relatively easily created. This trick has actually saved my life and I recommend this as a survival technique that everyone should at least know about. Thanks for the video.
@Jonesybabie These are skills, materials, and kit that you should have gathered and made work well in advance of needing them. Even though things are vastly different than when I learned about this, I''m sure you can find these items still for sale and can make the best piston and cylinder your mind can imagine. The things you have mentioned should be close to the first things you ALWAYS have anyway. Especially if you're in a Survival or SHTF situation. And remember, this was only one of many ways to create fire. Learning and practicing survival/SHTF skills is on the individual. I have done, and continue to do, my homework, build up my kit over decades of trials and errors, practiced, practiced, and practiced some more. Learned what works and when to use the skill/tool to accomplish tasks. If you don't have your kit (knowledge, practiced skills, tools/materials, etc.) ready to go at a moments notice, then I would urge you to develop that area of your life. Especially with the state of the world these days. Good luck and keep learning.
The energy in the gas is being focused into a smaller space. Kind of like how a magnifying lens works with sunlight it doesn't make energy, it just focuses it. The same thing happens in reverse, such as when you use an air duster for too long and it gets cold. A/C and refrigerators work by the same principle. That's why the back end gets hot. _I uh... hope that made sense to someone..._ 😅
When you compress the molecules into a tighter space, it's ability to hold the energy is decreased and the energy is release as heat. Think of it like a wet sponge. When you compress the sponge the water which would be the energy is released.
I was gonna ask what materials they could have used to make a good seal. Then I realized I forgot bone and horn existed, which both come in the form of convenient airtight tubes. Apparently bamboo works as well, which I had not guessed would be the case. Neat case where indigenous technologies went off on an entirely different direction and culminated in a product arguably superior to the European equivalent.
@@vincejohnm Wiki says “The antiquity of the fire piston in Southeast Asia is unknown, but it definitely pre-dated the Austronesian colonization of Madagascar (c. 100-500 AD).” But we all know the reliability of that site.
@@-ZH according to some tribes anything that wasn't invented in Europe of the 18th century and later doesn't exist. regardless of the reliability of wikipedia.
@@gumpus5490 Valves would be angled in the same direction as the flow of air to reduce turbulence and aid in the flow into and out of the combustion chamber. Whether air or water, you don’t really want right-angle turns as much as possible. Gentle bends/transitions optimize flow.
I‘m making the same observation every time I pump my bike‘s tires. To increase the internal pressure past several atmospheres, you need to apply quite a bit of pressure, and if you do all the time you get quite fast at it, which can heat up the pump significantly. Sometimes it gets so hot I rather wait a few seconds.
@@acm-gs6blThat's pistol shrimp. And fwiw, it's mostly for self-defence. (They mostly just eat little bits from the sand near their burrow.) I had one who felt threatened when a curious little blenny got in too close, and the poor little fish was paralysed from a brain/spine injury. He laid helplessly on the bottom of the tank for a while, and I honestly can't remember wherher I was able to help him or not. All that from the immense pressure & heat j in bubble by the pistol shrimp's claw pop; the claw didn't touch the fish.
I have one in fact it's a weird-looking lighter never knew what it was it had just been sitting in my drawer for quite some time until I came across a video about it
That's also why things heat up when they fall to Earth from orbit. It's not the friction of the air passing, it's the compression of the air underneath it.
typically referred to as the Heat of Compression in HVAC, though never used in a combustion sense. car mechanics will tell you that is the primary principle of operation for diesel engines
Its cool how to capsule is so fast the air around compresses adiabatically. But on a large scale even weather is based on adiabatic processes because gasses are so poor at transferring heat
Ok, you’re pretty close but there aren’t two phenomena at play here. There’s just an adiabatic compression. “The term "friction" is a misnomer. The source of heat is adiabatic compression - gas on trajectory of the reentering object is compressed against its leading surface, and as result heats up.”
@@UnknownMFethere is very definitely “skin friction” in fluid flow (gas in this case) over a surface as the fluid passes over / around it. That’s one source of aerodynamic drag, and it does, in fact, produce heat.
notice how the piston goes right back up after he hits it? that’s how the power in an engine is generated. the energy from the air pushing back will be almost as much as the force compressing it (only almost because there’s small losses from friction), but igniting the fuel changes it’s chemical energy into heat, expanding the air more and causing it to push back on the piston harder than it was compressed. that’s how fuel + air = power !
I have also seen this demo live before when we were learning the first law of thermodynamics. Because compressing a gas is actually doing work on it which increases its internal energy and hence temperature.
This one simple video has managed to teach me more about how engines work than anything else in my 22 years on this planet. That’s proper teaching right there.
A lot of people who use high pressure tanks, like Oxygen for Oxyacetylene or weld sheilding gasses, when you put on a regulator and open the valve on the tank, there is a flash inside the tube between valve and regulator. This is why you always make sure there is no grease, oil, paper, or cotton in the oxygen regulator collar or inside the orifice on the tank neck, the flash is fine when it's just oxygen, but something flammable will explode.
In gasoline engines this kind of autoignition is called knocking. It puts pressure on the piston before its in the right position. The reason lead was in gasoline in the past was to prevent this
Its not the early ignition, what wears the Engine and makes the knocking Sound. If a Gas Engine Knocks, there are basically two explosions happening: one explosion from the autoignition and one initiated by the Spark plug. When they Hit each other, a pressure Spike makes the Sound and puts huge wear on the Engine. To preven this, there are Sensors which can tell the ECU that the engine starts to knock. The ECU then fires the Spark Plug earlier, so the autoignition can't Happen anymore as there is nothing left to burn.
Thomas midgley Jr. had the idea to put lead in gasoline to stop engine knocking There's a TH-cam video called " how this man accidentally killed the most people in history "
@@rexruchi Depends on the Engine and the Fuel. Most modern Engines can run on Fuel at least one Grade lower then they are designed for, with the cost of less Power and more consmpumption. As anything less then 95 Octane went extinct in Europe decades ago, Knocking because of Bad Fuel isn't a Thing Here anymore. An Engine can also knock for other reasons, such as wrong Spark plugs, running too hot, massive Carbon build Up etc.
One thing we know is, at least they won't even register they just died. they probably hear the clank and crack, but they won't even hear the water rushing in their sub.
It's crazy that full grown adults willingly stepped inside that tiny low-budget submersible, knowing it was going deep into the sea. The thought of it gives me nightmares.
Primitive tribes in the Philippines use this principle to make a "lighter" of sorts. They use bamboo or other wood to make the cylinder and piston, it's tipped with something that easily catches fire...which is then used to start a larger fire.
As others have said, this is how diesel engines work. Definitely not other general internal combustion motors though. When this happens before the spark plug makes a spark in a gasoline or a propane motor, it's called "knock" or "preignition" and is very bad for the motor.
They have a more basic form of this for wilderness survival to help you start fires. It's great because you don't need matches or to rub sticks together. You just put your tinder in the cilynder and dump the ashes out and put kindling on the smoldering tinder. It's not easy to use but it's better than many other fire starters out there
I wish all my science teachers were as entertaining and exciting as this man is. I feel like learning from my nigga would make these classes a lot easier and fun to have learned from.
This is just physics. Joule-Thomson-Effect. No chemical reaction needed. The cotton was just to show that it gets hot enough to ignite stuff. Fun Fact Mr. Thomson was later ennobled and was afterwards known as Lord Kelvin.
I know it as adiabatic compression. But yeah indeed this has nothing to do with chemistry except that the cotton burns from a carbon compound to CO2 and H2O
The same reason why diesel and jet engines work. Once they are started, the compression of the air is enough to light the fuel by itself. The only way to turn them off is by removing the fuel or air.
That’s one of the basic principle of air conditioning. As your pressure rises, your temperature will also rise and vice versa. As your refrigerant goes through your compressor it drastically heats up as it is being compressed. As your refrigerant goes through your TXV (thermostatic expansion valve) the pressure immediately drops and your refrigerant temperature plummets as a result. Pretty neat.
No matter how many times i had this explained. This is the first time i actually fully understand and it and can actualize that theory and practice. If only engines were see-through!
Unnecessary...just pump up a bike type with a hand pump & if do it fast you won't be able to hold the bottom of it as gets hot from "heat of compression"
@@xxfalconarasxx5659 You clearly don't know the tempratures we are talking about here. Based on math calculations in a reddit thread it would have reached closed to 1 726.85 degrees celsius inside the sub. At that point the time of exposure is not your biggest problem
@@JoachimFosse I know quite well the temperatures we are dealing with. It's estimated that the fireball is about half way the temperature of the Sun. However, this is also the temperature you'd get from the detonation of a hand grenade. The temperature of a lightning strike is about 30,000 C, well over the fireball temperature inside the Titan. Most victims of lightning strikes are not reduced to ashes, because of how brief the exposure is. So my point still stands.
There is a camp fire igniter like that. Carbonated sheets are placed in inside the fire piston and hit will produce a smoldering patch of carmon cloth. That is the put on a pile of leaves and then the forest burns down.
Well... Mazda do it with skyactive X motors. Copy from a article... the Skyactiv-X engine will use high compression to ignite like a diesel, running a very lean air-fuel mixture and reducing emissions. But when you step on it, the Skyactiv-X acts like a regular supercharged Atkinson-cycle gas engine. The ignition process starts with a spark before the engine's increased pressure is used to heat up the cylinder and ignite the rest of the mixture without further help. ..and that was in 2017... We still better tech as EV 😏 Chill out.✌️
It's called compression ignition. It's why you need to filter air that you compress to high pressures, and remove any oil as well. If you open a high pressure line and there is dust or particulate matter in the line, it can ignite.
A friend and I made about half a dozen of these, they are called a Fire Piston. If you use char cloth instead of plain cotton, the ember will persist long enough to be pulled out and used to start a fire. Been used for centuries actually, even primitive versions made of bamboo!
@@lightbringer485 Some of the work done by the piston goes into heating the gas. On a microscopic scale it could be explained by molecules hitting the moving piston. As the piston is in motion relative to the gas, on average those molecules will gain velocity. For a thermodynamics description, have a look at adiabatic compressions.
nah thats because of the rubber piston rubbing on the inside of the pump creating friction = heat. a bike pump gets nowhere near the pressure needed to ignite anything
@@sh1l0u3xthat's not correct. The temperture exist of atoms that are moving, the more they move the hotter it is. By compressing the air the it gets way hotter, and to prove this, take a pump tube with the rubber inside but not let it build up pressure. You will notice it doesn't get near as hot as normally.
Nope, that's exactly why. Friction does cause some heating but the majority comes from the compression of the air. You can actually cause the pump to get extremely cold if you pull up quickly and then press down slowly.@@sh1l0u3x
A diesel engine uses this exact principle for its combustion since it has no sparkplugs. Gasoline engines just uses compression for a better burn since it compresses the gas into a more confined space so the sparkplug can burn the fuel faster to get the most out of its chemical energy.
This is also why anything that re-enters our atmosphere burn up during re-entry. They are going so fast that its compressing so much air on one spot, friction is just another reason why it also happens.
That's actually really interesting, never thought that could happen, I always thought it was just friction and that it didnt have enough pressure to make it heat up since it's in open air and not in a sealed chamber.
This is Guy-Lussacs Law. It describes how temperature relates to pressure, more specifically how temperature increases as pressure increases, and inversely how temperature decreases as pressure decreases. This is the reason why your gas canister on a camping stove starts to get cold or even frost up when you’re using it.
@@Dynamic101 It is a fairly simple law. If you go camping and you use a gas stove, you might notice ice build up around the regulator. This is what you are seeing. It also has some impact on aviation at high speeds, and can lead to a slight warming of the fuselage and wings.
@@flare9757 okay 👍🏻 got it During use, Gas is released so Pressure inside it decrease As the temp is directly proportional to pressure and vice versa The pressure decreased results in formation of frost right ? 💯
Fire pistons were actually invented by cavemen. They've been used for thousands of years. Also, in part what Diesel used as inspiration for his engine.
hello diesel engine! (not internal combustion engines in general as he suggested; gasoline needs a spark to ignite at the conditions gas engines operate under)
Gasoline basically does not need a spark to ignite. The wrong gasoline in the wrong gasoline engine will self ignite as well and cause knocking. Ofc. gasoline engines do not want the gasoline to self ignite that's the reason why gasoline is made to certain specs that do prevent self ignition so it does mostly only ignite from sparks. But for demonstration any of those engines will do.
@@shawnr771no, glow plugs aren’t like spark plugs, the closest thing to a spark plug used on *some* diesel engines are “hot bulbs” and how it works is diesel is sprayed over the hot bulb which vaporizes the diesel to aid in combustion.
It's know as GOBEK API in Malay peninsula..Fire pistons were invented by Southeast Asians (probably the Austronesian peoples).. Their use was mostly concentrated in the Austronesian regions, particularly in the Malay Peninsula, the Philippines, Borneo, Sumatra.. These piston bellows could pump sufficient air into a furnace to produce temperatures high enough to melt metal, which led to the independent development of sophisticated bronze and iron metallurgy in Southeast Asia starting at around 1500 BC
Makes sense. You would think the Butane in a cigarette lighter was cold, because it comes out cold, but its actually much warmer than when it comes out. It looses so much energy from being released that it makes frost.
This is basically how a diesel engine works, uses no spark plugs.
Was about to say this.
Not basically, diesels are just a little more complicated than the tube and plunger he used
@kingofspain18077 This is exactly how a diesel engine works. Air is pulled inside the cylinder, and the piston then moves up compressing the air inside causing it to heat up. The only difference is the fuel is misted in towards the end.
@mattc222 no need for that. I got Cosby sauce lol (ether)
@@jeffhall768 good ol Cosby in a can. MIIINT!
*diesels* "are we a joke to you?"
Next gen fuel: cotton balls
Was thinking the same thing 😂
Came to say this lol.
Very diesel literarely cotton on heat
This comment makes 0 sense
This is why we study thermodynamics
Right Thermo 1 and 2
You've broken the first rule of thermodynamics. Rule number one about thermodynamics, you don't talk about thermodynamics.
@@aland7236
Things I learnt in thermo is that higher the pressure lesser will the volume lesser the volume higher will be the temperature higher the temperature heat production will increase
Uhhh I am very bad in studies so idk it was in equilibrium or thermodynamics.....idk so...........
It is an adiabatic process, in which heat transfer is 0 and all work is used to increase Internal energy of gas and thus the temperature also rises.
They have this for outdoor use for survival, called a fire piston. Great tool
I was wondering if it could be used that way. Thanks for dropping it here so I can look it up.
Thanks! I couldn't think of the name of this and I've tried telling people a out it that don't believe me lol
Nice to know
what is called and how to use it ?
@@chucksauter1204 people being people kkk
A diesel engine is the practical form of this.
ah. So that must be why a lot trucks sound slightly different from cars. They have different engines
@@HumbBumbhe shows a gas engine tho
@@crestothegecko6279 Diesels in general sound a bit different than gas engines
@@HumbBumbhe shows a gasoline engine because he talks about "compressing fuel vapors before igniting them". That's a gas engine.
@@drcashmoney7507does not matter. Gas engines will do the same if they are used with the wrong fuel. At least for a short time.. 😂
Every diesel engineer/mechanic/enthusiast ever: "yeah, yeah I would actually..."
@@couchpotatoes5158 on the contrary, compression ignition is diesel mechanic 101. Even if a diesel mechanic did fit the flawed stereotype of a knuckle dragging oaf they’d still understand how and why.
@@couchpotatoes5158we are mechanics because the science of how things work interests us and we like to fix things. Any decent mechanic understands what they are working on and how it operates and the principles on how it operates. We literally diag shit all day long with no compression. Why would we test for compression if we didn't understand why it's important?
@@evandrewmartinez1 because “mekanic stoopid”. Couchpotatoes is a someone who’s had the term “gay-lussac’s gas law” copied onto his clipboard for a while now I think
@@couchpotatoes5158 youve definitely never had a theory lesson in your life
If mechanics were stupid then why in the sam hell can’t the folks who shit on them all the time live without them? Real fuckin’ goofy of those folks to bite the hand that makes sure they can drive to get to the hand that feeds them. Appreciate mechanics y’all. They’ve probably helped you in ways you cannot imagine or would ever realize.
To be more specific, it’s a diesel engine that ignites it’s fuel using compression. Ignition from compression in a gasoline engine is a bad thing and can usually be resolved by switching to a high octane fuel
Ignition from compression in a gas engine is usually the result of the wrong octane really. Each grade has different combustion ratios.
@@JakeKentner right, which is not good for the head gaskets or valve seats in an engine specifically designed to run on spark ignition.
no body care, its useless for the comprehension of the experience... so you are uselesss man
@@pedrourbano501 that is not at all correct. Not even a little bit other than the part about diesel fuel being an oil. The viscosity has nothing to do with compression ignition
It is an adiabatic process, in which heat transfer is 0 and all work done on the gas is used to increase Internal energy of gas and thus the temperature of gas also rises.
dQ = dW + dU,
In adiabatic process, -dW = dU
dU = n•Cv• dT
Exactly 💯
So what exam are you preparing for?
Genuine question.
@@feastbeforeheat NEET
@@vaibhavgupta8681 All the best brother!
@@feastbeforeheat Thanks🙏
“The power of the sun. In the palm of my hand.”
"I Will Not Die A Monster."
You know how much I sacrificed!!
“You best start believing in origin stories ,Parker.”
“You’re in one!”
@@deathchilde "com grandes poderes veem grandes responsabilidades 🤕"
Um segundo depois: 😵💀💀
Brilliant but lazy
I had to convince an officer and a chief on my ship not to replace the nitrogen in our gun recoil system with just regular air. We had run out and the system needs recharging every so often. I felt super proud of myself for possibly saving my ship from a major explosion lol. No idea if the pressures got up that high or not, but I figured we used nitrogen for a reason.
Considering the recoil system probably contains a lubricant, then yes, you did.
@@crd-nz_001 Well, the pressure would've ignited the oxygen. The oil too, of course. I called up one of my old 5 inch tech buddies and they confirmed this.
@@billparker244battleship? Or cruiser? Looks big enough to cause ruckus if it exploded
@@hanif7592 Cruiser and yes. There's no barrier between the gun and the loader room where the drum is. You can climb up into the gun shield for maintenance. It has a net that slides closed which is locked by a key that goes into the power distribution panel. In theory, you couldn't be up there while it had power for safety reasons.
@@billparker244 they're lucky to not have them n2 replaced. Thanks for your service mate💪
You are so true that so many people have had bad experience while learning chemistry and i am glad that you understand that.
That's rather physics than chemistry, though
It's engineering and specifically this course is an internal combustion engine
I love how the affiliate ad link blocks out exactly the wrong spot in the video so you can't see what's going on.
I remember many years ago in the early days of youtube, around the time google bought it, a lot of camping and survival channels were showing things like this as a method of starting a campfire
Oh right!! I remember that lol. You unlocked a memory for me 😂
fire piston :D
Man, 2006 was great.
I gotta find it now lol
Yeah, I remember that. lol. One channel even made a documentary about some tribe in south east asia who've been using bamboo piston fire starters for (presumably) thousands of years. Clever alternative to flint or fire-bow.
The opposite is also true. Expanding gas gets cold. That's why those CO2 fire extinguishers feel so cold or why you get frost on helium tanks.
Or when you freeze your hand trying to refill a butane lighter 😂
also how air conditioning works. Compressor does exactly what it was named for and then the evaporator expands the refrigerant to cool it. We've really come a long way with technology.
Or when I’m spraying the last bit of deodorant out of the can
Yep, you can calculate the exact temperature change using Gay-Lussac’s law
No, this is evaporation!
I love how the ad to buy the fire syringe blocks the actual explosion 😅
Lol! Like at the magazine rack at the gas station... "You gotta pay for that if you wanna read it..."
this is how the mantis shrimp punches prey
Fun fact, if you don't mind it massively wearing out everything really quickly, you can use this to get WAY more velocity/power out of a spring-piston air rifle. Put a little vaseline into the base of the pellets and it'll "diesel" it, turning it from an air rifle into an actual FIREarm at the expense of blowing out most of the gaskets and wearing out the barrel in only a handful of shots.
Nice
Legend
Came to comment this same thing. However I can confirm that if you don’t add too much oil or Vaseline you can still get quite a bit of extra velocity without destroying the seals right away. I’ve fired easily a couple hundred dieseled pellets and the gun still works great.
@@maukaman I used to put Hoppe's lube oil on the o-ring. A light film is enough, but I noticed that a drop or two would make the next few shots crack like a .22 if I gave it more than 3-4 pumps.
Accuracy was garbage tho!
What happens if you put ethanol in there?
“You wouldn’t think that squeezing something would ever cause it to catch fire”
The sun: am I a joke to you?
sun doesn’t combust tho😭
Solar plasma ≠ fire
@@billyrussell7789 no, but it goes get got. Same with the Earth's mantle
@@SilverStarHeggisist yeah just cause it hot doesn’t mean it has “caught fire”. fire is a product of combustion, not of fusion, fission or friction
@@billyrussell7789 however for the purpose here, it's semantics. Because something that has gotten as hot as the sun will catch things on fire.
Love how his reaction is, as if he sees this for the first time. Every time!
I think the reaction is not about what hes seeing but the force of the combustion meeting his hand
I love when scientists have the same sense of wonder about what they do that an average joe like me feels when seeing some of the stuff they do.
@@Sam-us1he I love (okay, not really) when "scientists" on TH-cam pretend to be amazed by shit we've been doing for a hundred years like they invented something.
@@sarcasticguy4311 Most of them probably aren't pretending. People with a scientific mind and a sense of wonder for the natural world are much less likely to get tired of seeing these things than other people. There are things I've seen a thousand times that I still stare at in awe every time because it's just that cool to me. Even something as simple as a blue sky or green plants. The more you know about how all of these things work and why they are the way they are, the harder it is to take them for granted, at least in my experience.
My uncle made a survival tool in the 80's on this principle. It's only feasible in extremely cold or wet areas (Think Sibera and arctic cyclones). Got enough money from 1 invention to care for his whole extended family to this day
Fire Piston. Tech has been around since 1745. Some bushmen still use the fire piston to start a camp fire.
Yep, in Malay culture/tradition this was a equipment they use for fire starter which made from wood & steel around the 17 centuries. I used it few times when i was a kid but nowadays people just use lighter
isn't flint stone ignition simpler and easier to riproduce in nature?
bro just craft flint and steel 💀💀
@fieryr Depends on a lot of factors. A planned trip and both options are equally viable, so let's look at SHTF scenarios.
Would the person recognize flint or one of the other stones that will spark off of carbon steel (since stainless won't work)?
Are they in an area with flint?
Most knives anymore are made of stainless steel, so it's unlikely most folks would have a carbon steel knife unless they specifically selected it. Since stainless won't spark, its unlikely a person would have the right materials unless they carry a SHTF kit all the time.
A fire piston can be made in the field with natural materials, but the skillset takes practice, so it's not something that somebody can just watch a vid and then hope to pull it off.
I personally don't depend on the fire piston but I won't write it off. I carry multiple fire-starting options every day for that reason.
Since pharaonical times. The old egyptians used fire pump igniters.
I would literally be able to play with that all day. Id just be finding random things to ignite.
Literally for hours we be finding victims of this contraption😂
Ok mr Pyro😂
Only cotton and a few other materials ignite like that.
@@al-imranadore1182 isnt going to stop me from trying everything like coffee creamer and what not.
I could see a kid putting an ant or roach in there. The horror. lol
Creo que esto también sucede con algunos combustibles de automoviles. Cuando vayas a recargar, revisa el octanage y fijate si es menor o mayor al de tu auto. Si es mayor, no hay problema, el combustible se encendera con la mecha como lo hace normalmente. Si es menor lo que pasara es que el combustible se quemara por la presión antes de que la mecha siquiera pueda encenderse, lo cual podría romperte el motor a largo plazo. No lo pongo en inglés porque es tarde y me costaría pensar, mas que no sé hablar ni escribir en inglés tan bien. Estoy aprendiendo así que algún día compartiré mis opiniones en su idioma para que les sea más fácil leerlos. Un saludo a quien haya leido esto, nos vemos.
"Fire Pistons" have been a staple in Bushcraft for thousands of years. You can still buy them on the internet, and use them to start campfires with nothing but a bit of tinder made to smoulder via compression. Plenty of TH-cams about them.
You know it's a legit science lab when the coat has "El Cocinero" written on it
I believe in "El Coochino"
@@HGKEntertainmentit says El Cocinero, meaning The Cook in Spanish I believe
😂😂😂😂He might turn around and stir a paella any moment😂😂😂
@@grbadalamentiHe be cooking meth
it means cook. Obviously a Breaking Bad reference. @@Nehauon
“Are you watching youtube all by yourself?”
“NO, i’m with the science team!”
Shut up
Fr and she tried retroactively try to accept that meme so she didn't look embarrassed😂😂😂😂
No shush I don't care
AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH
@@max3eeyyou commented
seems like you do care after all
To everybody saying this is how diesels work, NO SHITE SHERLOCK!!
He said in the video "internal combustion engine" meaning BOTH Diesel and Petrol engines use this method, petrol cars just have an extra step with a spark plug. Other than that, there's no difference.
I’m an infantry veteran and this is how you detonate the newer versions of the Claymore mine.
There is a firestarter called a fire piston that uses this. They're rather small, compact and reliable.😊
Cool I might buy one for my camping pack to use in emergencys
Char cloth is your friend. Fire roll lint with ashes works too. Not too hard. It will self ignite.
... and as old as old pharaonical egypt, at least. They did use fire pump igniters back then.
This kind of thing was tought to me as a child decades ago. It is called a fire piston and works amazing, especially if you put some charcloth in there; the pressure required to get charcloth to ignite is much lower and will create a burning ember much easier. All we used was a piece of copper pipe with a whittled piston made from a branch and made to snuggly fit into the cylinder but not get stuck. You put the charcloth and other dry combustibles into the bottom of the cylinder, place the whittled piston in the copper pipe cylinder and slam down, as in the video. Make sure to hold the piston inside the cylinder when you do this or your piston will launch from the cylinder, kind of like a mortar round. Your tinder/charcloth will be burning and can be dumped into a tinder bundle and then fire is relatively easily created. This trick has actually saved my life and I recommend this as a survival technique that everyone should at least know about. Thanks for the video.
Huh interesting, i always thought thus was how guns work
How did it save your life? What’s the story?
Yeah what's the story
Survival… 🤔where?! Some place a piston or copper pipe is located. And maybe some bottled water, pots/pans, and a radio too😂
@Jonesybabie These are skills, materials, and kit that you should have gathered and made work well in advance of needing them. Even though things are vastly different than when I learned about this, I''m sure you can find these items still for sale and can make the best piston and cylinder your mind can imagine. The things you have mentioned should be close to the first things you ALWAYS have anyway. Especially if you're in a Survival or SHTF situation. And remember, this was only one of many ways to create fire. Learning and practicing survival/SHTF skills is on the individual. I have done, and continue to do, my homework, build up my kit over decades of trials and errors, practiced, practiced, and practiced some more. Learned what works and when to use the skill/tool to accomplish tasks. If you don't have your kit (knowledge, practiced skills, tools/materials, etc.) ready to go at a moments notice, then I would urge you to develop that area of your life. Especially with the state of the world these days. Good luck and keep learning.
the kick back under compression perfectly demonstrates how the piston turns the crankshaft.
The energy in the gas is being focused into a smaller space. Kind of like how a magnifying lens works with sunlight it doesn't make energy, it just focuses it. The same thing happens in reverse, such as when you use an air duster for too long and it gets cold. A/C and refrigerators work by the same principle. That's why the back end gets hot. _I uh... hope that made sense to someone..._ 😅
When you compress the molecules into a tighter space, it's ability to hold the energy is decreased and the energy is release as heat. Think of it like a wet sponge. When you compress the sponge the water which would be the energy is released.
Can you tell me what heat energy is? Without looking it up on the internet
@@aceman9030 thermal energy. It's atoms jiggling and vibrating.
Cultures have been using this principle for starting fires for millennia. They’re called fire pistons and were the inspiration for the diesel engines.
I was gonna ask what materials they could have used to make a good seal. Then I realized I forgot bone and horn existed, which both come in the form of convenient airtight tubes. Apparently bamboo works as well, which I had not guessed would be the case. Neat case where indigenous technologies went off on an entirely different direction and culminated in a product arguably superior to the European equivalent.
For millennia? Jesus was using diesel pistons in Galilee?
Millennia sounds like a stretch but ok.
@@vincejohnm
Wiki says
“The antiquity of the fire piston in Southeast Asia is unknown, but it definitely pre-dated the Austronesian colonization of Madagascar (c. 100-500 AD).”
But we all know the reliability of that site.
@@-ZH according to some tribes anything that wasn't invented in Europe of the 18th century and later doesn't exist. regardless of the reliability of wikipedia.
The angles of the intake and exhaust valves tells me you’re right about that model “being older than you are”😂
What should it look like now?
@@gumpus5490 Valves would be angled in the same direction as the flow of air to reduce turbulence and aid in the flow into and out of the combustion chamber. Whether air or water, you don’t really want right-angle turns as much as possible. Gentle bends/transitions optimize flow.
I‘m making the same observation every time I pump my bike‘s tires. To increase the internal pressure past several atmospheres, you need to apply quite a bit of pressure, and if you do all the time you get quite fast at it, which can heat up the pump significantly. Sometimes it gets so hot I rather wait a few seconds.
"Smells like smoke" give this guy a fuckin' Nobel prize.
That's how boxing mantis shrimp generate energy to beat their prey to death
also how they literally boil water with the speed of their punches
This phenomenon is called cavitation in physics you can Google it for more detail
thats also how i do that
@@acm-gs6blThat's pistol shrimp. And fwiw, it's mostly for self-defence. (They mostly just eat little bits from the sand near their burrow.) I had one who felt threatened when a curious little blenny got in too close, and the poor little fish was paralysed from a brain/spine injury. He laid helplessly on the bottom of the tank for a while, and I honestly can't remember wherher I was able to help him or not. All that from the immense pressure & heat j in bubble by the pistol shrimp's claw pop; the claw didn't touch the fish.
I personally use it for ramen@@Crystal-58
There are survival fire starters like this that fit in your pocket.
Hell yeah, fire pistons are dope
I have one in fact it's a weird-looking lighter never knew what it was it had just been sitting in my drawer for quite some time until I came across a video about it
How do you get the fire out of the piston
yelling@@thestone8187
I actually thought this was a fire piston!
That's also why things heat up when they fall to Earth from orbit. It's not the friction of the air passing, it's the compression of the air underneath it.
This reminds me of when VsauceMichael took 2 balls and hit them together with a paper in between
typically referred to as the Heat of Compression in HVAC, though never used in a combustion sense. car mechanics will tell you that is the primary principle of operation for diesel engines
Can you explain further? I don't understand
Rudolf Diesel sent his greetings 😂
What a guy
You wouldn’t think that physics works as intended, but it often does!
Basically a diesel engine.
Apparently the same happens with atmospheric re-entry. It's not just the air friction that causes it to burn, its also the compression of the air
Its cool how to capsule is so fast the air around compresses adiabatically. But on a large scale even weather is based on adiabatic processes because gasses are so poor at transferring heat
Ok, you’re pretty close but there aren’t two phenomena at play here. There’s just an adiabatic compression. “The term "friction" is a misnomer. The source of heat is adiabatic compression - gas on trajectory of the reentering object is compressed against its leading surface, and as result heats up.”
@@teeanahera8949 ah ok. There's no real "friction" Thank you for clearing that up :)
@@UnknownMFemaybe friction would only be real friction with solids? Not sure.
@@UnknownMFethere is very definitely “skin friction” in fluid flow (gas in this case) over a surface as the fluid passes over / around it. That’s one source of aerodynamic drag, and it does, in fact, produce heat.
notice how the piston goes right back up after he hits it? that’s how the power in an engine is generated. the energy from the air pushing back will be almost as much as the force compressing it (only almost because there’s small losses from friction), but igniting the fuel changes it’s chemical energy into heat, expanding the air more and causing it to push back on the piston harder than it was compressed. that’s how fuel + air = power !
٠
Awesome stuff. I am in love with this kind of content.
Literally the last bit of info i needed to understand a combustion engine
I have also seen this demo live before when we were learning the first law of thermodynamics.
Because compressing a gas is actually doing work on it which increases its internal energy and hence temperature.
That’s not really a good explanation
This one simple video has managed to teach me more about how engines work than anything else in my 22 years on this planet. That’s proper teaching right there.
How I hate to agree with you on this one. Totally relatable.
A lot of people who use high pressure tanks, like Oxygen for Oxyacetylene or weld sheilding gasses, when you put on a regulator and open the valve on the tank, there is a flash inside the tube between valve and regulator.
This is why you always make sure there is no grease, oil, paper, or cotton in the oxygen regulator collar or inside the orifice on the tank neck, the flash is fine when it's just oxygen, but something flammable will explode.
Two words, everybody:
Titan. Sub.
They didn't get liquefied, they got INCINERATED.
In gasoline engines this kind of autoignition is called knocking. It puts pressure on the piston before its in the right position. The reason lead was in gasoline in the past was to prevent this
Its not the early ignition, what wears the Engine and makes the knocking Sound. If a Gas Engine Knocks, there are basically two explosions happening: one explosion from the autoignition and one initiated by the Spark plug. When they Hit each other, a pressure Spike makes the Sound and puts huge wear on the Engine. To preven this, there are Sensors which can tell the ECU that the engine starts to knock. The ECU then fires the Spark Plug earlier, so the autoignition can't Happen anymore as there is nothing left to burn.
Also engine run on or dieseling.
@@walterbishop2 what are the causes of engine knocking and can it be prevented by high octane fuel
Thomas midgley Jr. had the idea to put lead in gasoline to stop engine knocking There's a TH-cam video called " how this man accidentally killed the most people in history "
@@rexruchi Depends on the Engine and the Fuel. Most modern Engines can run on Fuel at least one Grade lower then they are designed for, with the cost of less Power and more consmpumption. As anything less then 95 Octane went extinct in Europe decades ago, Knocking because of Bad Fuel isn't a Thing Here anymore.
An Engine can also knock for other reasons, such as wrong Spark plugs, running too hot, massive Carbon build Up etc.
The folks onboard the Titan Submersible met their fate the same way.
One thing we know is, at least they won't even register they just died.
they probably hear the clank and crack, but they won't even hear the water rushing in their sub.
Came for this comment 😂
How so?
It's crazy that full grown adults willingly stepped inside that tiny low-budget submersible, knowing it was going deep into the sea. The thought of it gives me nightmares.
Fast enough for the brain receptors to even register, that's insane.
These are how the plunger firestarters work that hikers campers, hunters, survivalist, take in the woods with them.
Primitive tribes in the Philippines use this principle to make a "lighter" of sorts. They use bamboo or other wood to make the cylinder and piston, it's tipped with something that easily catches fire...which is then used to start a larger fire.
This guy's going to freak out when he hears about a diesel engine.
Wut
@@couchpotatoes5158 I said "This guy's going to freak out when he hears about a diesel engine."
@@JoeShopperLOL (and I want to stress the last "L")
This guy is the type of person to teach someone what they need to invent diesel engines.
As others have said, this is how diesel engines work. Definitely not other general internal combustion motors though. When this happens before the spark plug makes a spark in a gasoline or a propane motor, it's called "knock" or "preignition" and is very bad for the motor.
Chinese office chairs in a nutshell
They have a more basic form of this for wilderness survival to help you start fires. It's great because you don't need matches or to rub sticks together. You just put your tinder in the cilynder and dump the ashes out and put kindling on the smoldering tinder. It's not easy to use but it's better than many other fire starters out there
Diesel engine to be precise, most ICE engines use gasoline and spark plugs, but Diesel engines work just like this.
This has childrens science toy potential, they love fire and smashing stuff! Plus this seems fairly safe, which is nice
I was scrolling through the comments looking to see if anyone has a link to this thing for sale and I saw your comment hahaha
ye, but webare of the fuel they'll use😂
It's only a matter of time before they figure out they can light fires with it.
This man has taught me interesting lessons than in actual school.
Man in Lab Coat: "You wouldn't think squeezing something super quickly would cause it to catch fire"
Thermodynamics: Am I a joke to you?
I wish all my science teachers were as entertaining and exciting as this man is. I feel like learning from my nigga would make these classes a lot easier and fun to have learned from.
Indeed science is like a game ,or a story
science teachers should be either fun or good story tellers
learning from your WHAT ⁉️⁉️⁉️⁉️🤨
Chemistry is more interesting than my thinking, just need teachers like you 🙂💯
This is just physics. Joule-Thomson-Effect. No chemical reaction needed. The cotton was just to show that it gets hot enough to ignite stuff. Fun Fact Mr. Thomson was later ennobled and was afterwards known as Lord Kelvin.
@@katzofant thanks bro for sharing this such information with me💫🌟
I know it as adiabatic compression. But yeah indeed this has nothing to do with chemistry except that the cotton burns from a carbon compound to CO2 and H2O
The same reason why diesel and jet engines work. Once they are started, the compression of the air is enough to light the fuel by itself. The only way to turn them off is by removing the fuel or air.
That’s one of the basic principle of air conditioning. As your pressure rises, your temperature will also rise and vice versa. As your refrigerant goes through your compressor it drastically heats up as it is being compressed. As your refrigerant goes through your TXV (thermostatic expansion valve) the pressure immediately drops and your refrigerant temperature plummets as a result. Pretty neat.
No matter how many times i had this explained. This is the first time i actually fully understand and it and can actualize that theory and practice. If only engines were see-through!
Unnecessary...just pump up a bike type with a hand pump & if do it fast you won't be able to hold the bottom of it as gets hot from "heat of compression"
This is why the Titan crew vaporized before they could be crushed
The fireball lasts for a fraction of second. It probably would hardly leave a first degree burn, let alone "vapourise" them.
@@xxfalconarasxx5659 You clearly don't know the tempratures we are talking about here. Based on math calculations in a reddit thread it would have reached closed to 1 726.85 degrees celsius inside the sub. At that point the time of exposure is not your biggest problem
@@JoachimFosse I know quite well the temperatures we are dealing with. It's estimated that the fireball is about half way the temperature of the Sun. However, this is also the temperature you'd get from the detonation of a hand grenade. The temperature of a lightning strike is about 30,000 C, well over the fireball temperature inside the Titan. Most victims of lightning strikes are not reduced to ashes, because of how brief the exposure is. So my point still stands.
Lightinging uses most of its energy going through the air by the time it reaches the person it is much less powerful
@@xxfalconarasxx5659 Isn't what cools it down in the video decompression. That sub stayed compressed, no energy lost to decompression right?
Thats awesome. Best video Ive gotten to watch today. I woke up and now this is a awesome trick to watch.
There is a camp fire igniter like that. Carbonated sheets are placed in inside the fire piston and hit will produce a smoldering patch of carmon cloth. That is the put on a pile of leaves and then the forest burns down.
Only diesels use compression for ignition. Gasoline vehicles use spark.
The compressed air pressure built up in the cylinder also is part of the contribution to the power.
Unless they are knocking
Well... Mazda do it with skyactive X motors.
Copy from a article...
the Skyactiv-X engine will use high compression to ignite like a diesel, running a very lean air-fuel mixture and reducing emissions. But when you step on it, the Skyactiv-X acts like a regular supercharged Atkinson-cycle gas engine. The ignition process starts with a spark before the engine's increased pressure is used to heat up the cylinder and ignite the rest of the mixture without further help.
..and that was in 2017...
We still better tech as EV 😏
Chill out.✌️
@@ultrastoat3298 yes, that's why high compression gasoline engines require premium fuel, to prevent premature ignition due to this effect.
Would gasoline not catch fire if compressed? Or that happens only to diesel?
"Now that didn't happen because I'm so strong.. even though I am"
-Michael Stevens
Or, am I?
homie casually pulls out his combustion engine from the side of the desk
It's called compression ignition. It's why you need to filter air that you compress to high pressures, and remove any oil as well. If you open a high pressure line and there is dust or particulate matter in the line, it can ignite.
I see survivalists using this method to start fire.
A friend and I made about half a dozen of these, they are called a Fire Piston. If you use char cloth instead of plain cotton, the ember will persist long enough to be pulled out and used to start a fire. Been used for centuries actually, even primitive versions made of bamboo!
Yeah Survivorman Les Stroud uses one in one of his videos.
@@Vikingwerk I remember seeing the it made from bamboo actually! Lol
@@iamgriffThat was how it was made traditionally
You can start a fire with a hammer and a nail
yes... but can we atach it to a gundam???
Now we can build ncc-1701 at last🔥🔌🚀
Not just the heat, the increase in pressure also means there's more oxygen molecules closer to the cotton.
excellent point!
Well I didn't understood it..
When he Squeezed It
Pretty sure
Volume decreased, And Pressure increased
So How Come Temprature Increased there
@@lightbringer485When you squeeze gas, the atoms get closer even when they don’t want to. This makes them vibrate around a bunch which makes it hot.
@@john-ic5pzpointless point. Just imagine high pressure low temperature air around cotton. Will it ignite? I doubt it.
@@lightbringer485 Some of the work done by the piston goes into heating the gas. On a microscopic scale it could be explained by molecules hitting the moving piston. As the piston is in motion relative to the gas, on average those molecules will gain velocity.
For a thermodynamics description, have a look at adiabatic compressions.
I'm a diesel guy so I absolutely would believe it lol. Cause that's how my engine works.
Whoa.....cool....a diesel guy
@@HalideHelix big diesels tho. Not those cute little pickup ones
Same here lol
🙄
@@Redbikemasterno, the cute little ones, too. They all work by compressing the air to the point of the heat igniting the atomized fuel.
It's also the same principle that causes space vehicles to heat up upon reentry.
Sounds like the sound a Jacob's revolver makes in Borderlands 2
I was wondering why my pump tube got so hot while I was pumping up my bike on a very cold day. Thanks!
nah thats because of the rubber piston rubbing on the inside of the pump creating friction = heat. a bike pump gets nowhere near the pressure needed to ignite anything
@@sh1l0u3xthat's not correct. The temperture exist of atoms that are moving, the more they move the hotter it is. By compressing the air the it gets way hotter, and to prove this, take a pump tube with the rubber inside but not let it build up pressure. You will notice it doesn't get near as hot as normally.
The opposite of this may be a whip cream or duster canister cooling down quickly as it releases pressure.
Nope, that's exactly why. Friction does cause some heating but the majority comes from the compression of the air. You can actually cause the pump to get extremely cold if you pull up quickly and then press down slowly.@@sh1l0u3x
You got me in the first half not gonna lie.
I made a fire piston out of an old mini maglite, and used that in Scouts and it was easily my favorite way to start a fire
"I wouldnt think that squeezing something would start a fire." The sun all day every day for millions of years.
A diesel engine uses this exact principle for its combustion since it has no sparkplugs. Gasoline engines just uses compression for a better burn since it compresses the gas into a more confined space so the sparkplug can burn the fuel faster to get the most out of its chemical energy.
That piston model was awesome.
This is also why anything that re-enters our atmosphere burn up during re-entry.
They are going so fast that its compressing so much air on one spot, friction is just another reason why it also happens.
That's actually really interesting, never thought that could happen, I always thought it was just friction and that it didnt have enough pressure to make it heat up since it's in open air and not in a sealed chamber.
@ElPsyCongroo. At supersonic velocities, the air can't move out of the way fast enough. So, in a certain sense, the air itself is a "cylinder wall"
That's true. Friction is one but not the only reason. 👏
@@juliavixen176 Aerospace engineer here, can confirm that air starts behaving really funky when you move something through it at supersonic speeds.
gets hot from "heat of compression"
It’s for diesel engines only. Gasoline engines require a spark to ignite the compressed fuel. Diesel ignites through the compression only.
What's interesting is that now you get curious how/who discovered you could just crush something and it would heat up.
This is Guy-Lussacs Law. It describes how temperature relates to pressure, more specifically how temperature increases as pressure increases, and inversely how temperature decreases as pressure decreases. This is the reason why your gas canister on a camping stove starts to get cold or even frost up when you’re using it.
Elaborate please 🥺
th-cam.com/users/shortsfrmNjuWrzJg?feature=shared
@@Dynamic101 It is a fairly simple law. If you go camping and you use a gas stove, you might notice ice build up around the regulator. This is what you are seeing. It also has some impact on aviation at high speeds, and can lead to a slight warming of the fuselage and wings.
@@flare9757 okay 👍🏻 got it
During use,
Gas is released so
Pressure inside it decrease
As the temp is directly proportional to pressure and vice versa
The pressure decreased results in formation of frost right ? 💯
@@Dynamic101 Yes, if it gets cold enough. Inversely, if a container is being pressurized, temperature goes up. It is weird until this is explained.
This would scare a caveman
Fire pistons were actually invented by cavemen. They've been used for thousands of years. Also, in part what Diesel used as inspiration for his engine.
Wow a science video with useful information. Very rare site these days
I was coming to make a diesel joke but I see this thread is already full of cultured men
hello diesel engine!
(not internal combustion engines in general as he suggested; gasoline needs a spark to ignite at the conditions gas engines operate under)
Diesel requires a glow plug for intial ignition.
Gasoline basically does not need a spark to ignite. The wrong gasoline in the wrong gasoline engine will self ignite as well and cause knocking. Ofc. gasoline engines do not want the gasoline to self ignite that's the reason why gasoline is made to certain specs that do prevent self ignition so it does mostly only ignite from sparks. But for demonstration any of those engines will do.
@@shawnr771no. Glow plugs are for preheating not for ignition. Not needed to run but makes the diesel engine start faster and cleaner.
@@shawnr771no it doesn’t. Who told you that.
@@shawnr771no, glow plugs aren’t like spark plugs, the closest thing to a spark plug used on *some* diesel engines are “hot bulbs” and how it works is diesel is sprayed over the hot bulb which vaporizes the diesel to aid in combustion.
It's know as GOBEK API in Malay peninsula..Fire pistons were invented by Southeast Asians (probably the Austronesian peoples).. Their use was mostly concentrated in the Austronesian regions, particularly in the Malay Peninsula, the Philippines, Borneo, Sumatra.. These piston bellows could pump sufficient air into a furnace to produce temperatures high enough to melt metal, which led to the independent development of sophisticated bronze and iron metallurgy in Southeast Asia starting at around 1500 BC
Makes sense. You would think the Butane in a cigarette lighter was cold, because it comes out cold, but its actually much warmer than when it comes out. It looses so much energy from being released that it makes frost.
We actually use these in bushcraft, it’s a very reliable way of making fire outside (nobody really does after you buy it though 😂)
that's the best way to put it, Doc.