"You can this project, I'm giving it to you". Wait, so we can't use your other projects? Dang it, looks like I have to close down the mine in my backyard now. Oh well
@@LuizDahoraavida It's an Acid-Base Reaction, where a Salt and H2O is created, while they both neutralize eachother because the acid gives a proton (H+) to the base, neutralizing them
@@alanelcapon8342 If mixed in the proper ratio. My mixture might have a slight excess of Aqua Regia. (Which I saw a lab worker dump 500ml of on himself while the acid was hot. You never seen two people rip the clothes off one other person so quick. Lab worker was fine, pants were not. lol)
RedDiamondPanda I know you're kidding, but that's 100% NOT true, which is a huge reason why I like his videos. Many channels only use polished footage of success, which is great for an instructional video, but Cody shows the thinking process, mistakes, and how things usually work in real life. For example, picture the King if Random in his socks, showing a rocket that doesn't move the old skateboard, using duct tape until he finds a roll of electrical tape, etc. I'm not knocking his (KoR) videos, because they're really good, but Cody shows a more unedited, authentic representation of real life. Considering the skateboard didn't move on it's own, this video alone proves your premise incorrect. Like I said, I know you were just kidding, so I'm not arguing, just pointing out that Cody is the last person that would apply to your comment :)
boltblast I noticed that he said that too. wondered how badly he cut himself. Kanyon needs to take all sharp objects from him and give him a pair of those little kid scissors that you cant cut yourself with. lol
Cody, I've been watching your videos for quite some time now, Thank God for people like you who take scientific subjects that normally confound people (who are not scientifically savvy), and explain, and display them in a tangible manner that can actually be understood. Big THUMBS UP, and please keep up your good work.
2 things 1. Maybe make the container where the two reactants mix larger, so you don't have propellant being formed after it's already escaped. 2. Put a one-way valve on the inlet so you don't have back pressure on the pumps, allowing for a smaller diameter outlet
Making the reaction chamber larger wont help much just add weight and size, a smaller reaction chamber is better, the important thing is to achieve good mixing, once the reactants are mixed there is no point in prolonging their stay on the reaction chamber. The average mass flow will be always limited by the power of the pumps, adding check valves and reducing the nozzle diameter might not help and in fact lower the power by lowering the duty cycle due induced oscillations.
Back in the 1960's, Poland's Moon Mission project settled on a vinegar and baking soda rocket engine design. I understand they are still working on enlarging the fuel tanks.
I guess if he oiled the bearings it would've worked. You can see that soapy water already makes things better and in the end of the experiment the skateboard looks more like it "wants" to move.
+Duck Chop How so? You get some protection from the solar wind despite not having a magnetosphere. You have a longer time to deal with a leak in your suit or blimp or room than you would on Mars or in space. You get closer to Earth gravity which is important to health, and you get decent amounts of sunlight which is good for plants and solar panels. You don't die faster there compared to Mars, well unless your a surfacist.
It does look like it'd be fun to experiment with. I'd try 1) using a longer reaction chamber. 2) Adjusting the speed of the pumps. 3) using more concentrated components. 4) using a hopper to feed the soda in dry. 5) probably way beyond a science fair project, but a pulse system that only releases the pressure when it's strong enough to move the board. Of course, I've never built a rocket in my life, & these are mearly what I'd want to try. :)
Benjamin Antman it brings me back to my childhood days in mother Russia throwing Moldov Cocktails into my neighbors living room and the homes of government officials.
Cody found your channel a couple of months ago and love it. What is nice is you have something for everyone of all ages. With this project if you were to point the jet more towards the ground or place a wall behind so then it has something to push off of. This did bring back memories of building a paper mache volcano in grade school and using dye coloring with the vinegar and baking soda mixture.
Pushing off of something could work, but it ruins the whole "rocket" idea because of why it works: if you place a board or something in the exhaust stream of the rocket and bring it close enough to the motor you cause a restriction of the flow that backs up into the nozzle. This back-up raises the pressure in the nozzle, which increases thrust, BUT as soon as the rocket moves at all you have to chase it with the board while continuing to push the board forward against the exhaust pressure. You could just as easily turn off the rocket motor, push the board all the way up to touching the nozzle, and just push the rocket forward with the board. Having the motor running provides no extra benefit.
Who can possibly dislike this video? It’s probably the most honest video out there. No clickbait, no scamming, no constant subscribe button on screen. Just science explained by an awesome dude.
@@H3wastooshort its a meme. You answer with yes to any yes/no or versus question. For example: Game reviewer: hey is this a bug or a feature? Bethesda: Yes....
If it's rp1 and lox rp1 is an hydrocarbon rp1 is just purified kerosene and if it's hydrolox then it's just two atoms I dont know if those are chemicals but if you're talking about hypergolics those are defenitly chemicals like hydrazine and nitrogen tetroxide
Wouldn't putting them in parallel increase the pressure more than if they're in series? Having trouble getting my head around it. If the pumps are of equal power, then only the first one would have any effect, right?
Adamast But twice as fast is what we want. Momentum is mass * velocity, so those are the only things that we can change. We could put something in the liquid to make it more *mass*ive, or increase the speed at which it's ejected. (The latter is what Cody did by adding a nozzle)
Working backward. We want the ejected fluids to be going fast (Higher Specific impulse). Bernoullis Principle says that there has to be a pressure drop between the slow moving fluid and the fast moving fluid. (Think of it in terms of potential energy being turned into kinetic energy) So the fluid inside the chamber is at a higher pressure than the outside. The pumps need to overcome that pressure difference to maintain fuel flow. Each pump is producing a pressure difference between it's inlet and outlet. If the pressure inside the chamber exceeds the pressure difference the pump can produce, the flow will be backwards through the pump, and the engine will go through a burn/refill cycle instead of continuous operation. Putting pumps in series adds the pressure differences. Thus they can pump fuel into a higher pressure chamber. Thus the nozzle can be smaller and the exhaust velocity higher. Higher Isp => more efficient engine. If you also keep the RATE of flow from dropping too much, you also get higher instantaneous thrust.
Jayyblamesthegame Incorrect. Adding pumps increases head which increases the potential for pressure but does not automatically provide pressure by itself. So long as the same amount of water is moving through the same amount of pipe at the same height, the pressure will be the same., no matter how many pumps are running. Putting the pumps in parallel will pump more water which will increase pressure in the same sized pipe. Reducing the pipe size for the same amount of pumped water will increase pressure. Or, increasing the height that the water is pumped to will increase pressure as gravity will increase the pressure with the height of the water column on the falling side. The first works adding two pumps in parallel. The latter two will work for one pump up to its head limit. Only then will adding a pump in series actually increase pressure.
It's just easier to set up that way because of the kick-tail, If he wanted to make it go forwards he would have had to elevate the reaction chamber to above the kick-tail in order for it to be level.
Also remember that as the fuel is spent the rocket's mass decreases. Why not cut the mass in half by putting solid baking soda in the reaction chamber and pump in an acid?
The name for the effect caused by the nozzle and the reason it improves the flow and thrust is called the Venturi Effect. Would love to see some scientific explanation and demonstrations on the topic from you Cody! Airflow and liquid dynamics are always fun to learn about.
Well it look like you did not think at all...you are saying he's basically stupid for asking if what very well could be still acidic will kill the grass. Ironic.....
im glad someone else noticed all that salt water he was spraying out was draining out into the lawn, for a smart kid he can be pretty clueless apparently rofl.
Apparently you idiots are all unaware of the existence of a thing called road and sidewalk salt that is applied to these surfaces at hundreds of times the quantity seen here every winter with little effect on grass. See there's this other thing called rain... dumbasses
Fun project as always Cody! I think if you would make all containers sealed and provide a small line back to the tanks for them to also pressurize, the pumps would be able to put liquid trough with a smaller nozzle resulting in more thrust.
"Compared to the many other things i do on this channel, this is rather tame" Thinks of the times you dipped your bare arm in mercury, played with a geiger counter in front of radioactive material and took a sip of cyanide.
Bradley Maynard He sets off lots of explosives. In his mine, in vacuum chambers, in his shed, outside. Some with lots of protection, others with very little. He's even made nitroglycerin. Yeah, there's lots of explosions on his channel.
Man, I can't tell you enough how much I enjoy your videos. I'm not very smart, but this stuff is still interesting and fun to watch. Thanks for sharing!
There is a lot of research on "soda and mentos" nozzles For an engineering class that was our only assignment one semester. It was to design a rocket car using diet coke and mentos. My team and I went a different route. Instead of just relying on thrust I thought it would be a good idea to make it like a water wheel so you get get a little extra energy out of the thrust. Our car was not the fastest but we got the longest distance. We got an A on our assignment which was pretty sweet. And we got a note from the instructor who said he had never seen anyone try that idea before and thought it was genius. This little note stroked my ego a little bit.
My science fair project was an tin lifter. A triangular lifter made out of tin foil, toothpicks and very fine copper wire that was hooked up to high voltage causing an electromagnetic lift.
This is certainly better than what I did as a kid. Dropping clumps of baking soda into the bottle as quickly as I could. But it occurs to me that instead of pumps and open top bottles, use containers that can hold compressed air with a tube going to the bottom of the liquid so when valves are opened the liquid is forced much faster into the 'combustion' chamber. It would also reduce weight and the compressed air would even add to the thrust.
Cody'sLab, I know you probably won't read this but... Keep up the good work. Ignore the idiots who have whined about production quality, crediting request or the ad plug. I like many other have watched your videos for years (longer than most other changes) and that's not because you have preaty graphics or 4k footage, it's because you give a real life look into how a real person can do things. There is much more value in seeing you mess up and make adjustments and corrections than getting a step by step guide like most "competing" creators. Also thank you for reminding people to give credit for science fairs, it's a good practice for children to learn and usually required in academic circumstances... Have a good one, and hello from Australia!
If I was a millionaire,I would sponsor your channel.I love your content and how down to earth you are. Great video Cody,you should do more of these simple "how to" videos,very educational.Keep it up mate 👍🏻.
bovinespongiformflu Yea, I really doubt that they are in any way additive. Each pump moves a certain capacity of water for the given motor input. Increasing pressure would require pushing into a narrower channel or moving more mass. The latter is not possible because the mass going though both pumps must be the same. I concede that the second pump might have an easier time as the water has been pre-accellerated and thus pull the first one along slightly, but I would expect that effect to be minimal.
Evan Van Slooten Google says that pumps in series increases HEAD, not pressure. It also confirms my assertion about flow rate. Head, without decreasing the size of the hose from one pump to the next will result in equal pressure. If he wanted increased pressure he could have placed the pumps in parallel to push more water through the same sized pipe, he could have reduce the size of the intake pipe, or he could have raised the height path of the pipes. These would work for a single pump up to its head limit. THEN if the head was insufficient to increase pressure in the line, he could have added another. As it is, the second pump is superfluous.
The head pressure you are referring too is the maximum possible pressure that the pump is able to exert. However, in order for a system to reach that pressure, the system must be able to push back on the pump with as much pressure as the pump capable of pushing. If not, the system simply gives way and releases the pressure before it can ever reach the pumps limit. I have extrapolated about this in other posts but the short answer is this: if a single pump is able to pump, then there is no pressure or volume advantage to using the second. It is superfluous. If the back pressure exceeds what the first pump is able to produce, only then will the second pump actually increase pressure to the system by doubling the maximum POSSIBLE pressure. Still, it does not automatically indicate that the pressure in the system will be doubled. The actual working pressure will still only equal what the back pressure can exert as a load on the pump. The pump sets the maximum pressure and the load determines the actual working pressure.
well once in a while this is kinda nice isn´t it? it´s still interesting not dangerous at all. why not? it doesn´t need to always be dangerous to be interesting and he did explain what´s going on in the big guys
Ehm, combustion chamber? Acid-base-reaction chamber? Nevermind, isn't using pumps, plumbing pipes and so on a bit overkill for such an inefficient rocket motor?
Seemed like a spontaneous idea and video. Nothing wrong with that. Plenty of Cody's videos are like this. I don't like the fact that consumers of youtube videos are now acting as though they're owed higher quality stuff. At the end of the day, these videos are just Cody sharing what he's doing with you and if you don't like it, you didn't have to watch it. If the video let your expectations down, your expectations are too high.
He definitely didn't "forget" to put the nozzle on before the first test. He was worried that the nozzle would cause thrust enough from the pump power alone. I think it's really awesome that he did that, though, to give it a stronger effect on kids.
Have the nozzle point down. The ground can’t move (by much) so to conserve momentum the skateboard can go faster. The thrust is directed into the air air which can move.
I'm glad you didn't pressurize the tanks, because I'm pretty sure the thrust generated by the external pressurizer would have far outweighed that of the chemical reaction.
![ร้อยพ่อพันแม่ - WanMai [Official MV]](http://i.ytimg.com/vi/XY2pNYASEbg/mqdefault.jpg)
I like how Cody is showing content for younger viewers to enjoy. They can work their way up to synthesizing nitric acid
"You can this project, I'm giving it to you". Wait, so we can't use your other projects? Dang it, looks like I have to close down the mine in my backyard now. Oh well
What am I going to do with all my rabbit pellets now?
And I just got done converting all my toilets to flush mercury.
So you are telling me I have this ice cold glass of cyanide here for nothing?
Tvegal and I was about to bite metallic sodium
My gold has been in the furnace for like 4 days now....
"Something that someone can use for a science fair project"
"I'm gonna spike my vinegar with muriatic acid"
Just use Citric Acid.
not like hydrochloric acid was that expensive or rare
@@phobos1963 i think he was referring to the safety part
@@RabbitsInBlack fluorine would spce stuff up more
or chlorine pentafluoride
An unmanned acid spraying skateboard. Love it.
It's a salt, or whatever it's called in english when you mix a base with an acid.
@@LuizDahoraavida It's an Acid-Base Reaction, where a Salt and H2O is created, while they both neutralize eachother because the acid gives a proton (H+) to the base, neutralizing them
Don't mind the people here not getting the joke ;)
@@alanelcapon8342 If mixed in the proper ratio. My mixture might have a slight excess of Aqua Regia. (Which I saw a lab worker dump 500ml of on himself while the acid was hot. You never seen two people rip the clothes off one other person so quick. Lab worker was fine, pants were not. lol)
@@seanb3516 why aqua regia lol
"This'll be good for a children's science fair." Five minutes later: "I'm adding Hydrochloric acid to the vinegar."
He added muriatic acid, which is the active component in vinegar
Muriatic acid is hydrochloric acid... vingar is acetic acid @@michaelfixedsys7463
End My Pain.
No, nitric acid is a much better fit for a children’s science fair.
Ian Ross some pyrophorics
Next week on "Cody's Space Program", Cody tries to get into space with a box of matches and some tissue paper.
And fails horribly.
UZI Cody never fails tho.
RedDiamondPanda Because he just doesn't fail
RedDiamondPanda I know you're kidding, but that's 100% NOT true, which is a huge reason why I like his videos. Many channels only use polished footage of success, which is great for an instructional video, but Cody shows the thinking process, mistakes, and how things usually work in real life.
For example, picture the King if Random in his socks, showing a rocket that doesn't move the old skateboard, using duct tape until he finds a roll of electrical tape, etc. I'm not knocking his (KoR) videos, because they're really good, but Cody shows a more unedited, authentic representation of real life. Considering the skateboard didn't move on it's own, this video alone proves your premise incorrect. Like I said, I know you were just kidding, so I'm not arguing, just pointing out that Cody is the last person that would apply to your comment :)
Cody learns from failures. Learning is a net positive. Therefore he never fails.
"Cutting things is rather dangerous," says the guy who literally ate cyanide. 😂
boltblast Hey man, he didn't go get help, he can deal with it.
or the guy who ate dry ice.
boltblast I noticed that he said that too. wondered how badly he cut himself. Kanyon needs to take all sharp objects from him and give him a pair of those little kid scissors that you cant cut yourself with. lol
or the guy who poured mercury all over his basement
His general attitude for this video was more directed towards kids I think, so he was just telling kids to not play with sharp objects.
how many comments am I gonna read through before someone mentions Cody's socks?
so far you are the first
I'm just messing Cody.. I notice because I am the same way!
Bryan Roberts what time?
Bryan Roberts that is hilarious. I was doing the same thing lol
I did to lmao
Cody, I've been watching your videos for quite some time now, Thank God for people like you who take scientific subjects that normally confound people (who are not scientifically savvy), and explain, and display them in a tangible manner that can actually be understood. Big THUMBS UP, and please keep up your good work.
500ml of 5% vinegar solution will consume about 50g of baking soda.
"Cutting things is rather dangerous" ... "Now we take this drill..."
and the hydrochloric acid
and these uninsulated copper wires
and muratic acid
and this vial of mercury
and maybe some flex seal
... kids - this video stopped being usable as a science project when he started handling hydrochloric acid.
hachnslay lmao
hachnslay you can substitute it for vinegar, it just won't be as effective
Wasnt it muriatic acid?
Murican acid
There is nothing wrong with HCl for a science project.
i wasnt gonna watch this
but then i saw "Cody'sLab" under the title
2 things
1. Maybe make the container where the two reactants mix larger, so you don't have propellant being formed after it's already escaped.
2. Put a one-way valve on the inlet so you don't have back pressure on the pumps, allowing for a smaller diameter outlet
Making the reaction chamber larger wont help much just add weight and size, a smaller reaction chamber is better, the important thing is to achieve good mixing, once the reactants are mixed there is no point in prolonging their stay on the reaction chamber.
The average mass flow will be always limited by the power of the pumps, adding check valves and reducing the nozzle diameter might not help and in fact lower the power by lowering the duty cycle due induced oscillations.
Cody: Kids, you can use this science experiment at your science fair
Also Cody: Lets spike our fuel with hydrochloric acid
I wonder if sulphuric will cut it 😂
Muradic or muratic or summit not hydrochloric
Edit: nvm I’m an idiot
@@Jamesdavey358 muriatic and hydrochloric is the same thing
@@industrialadhesive6357 if you really want more power a hydrogen fluorine mix should be ok
@@VerbenaIDK yes that's why I said "edit : nvm I'm an idiot"
Please don't forget to record your fallout shelter build, I'll love watching them
You better strap in for a long wait, Cody has a habit of quietly abandoning things for "better ideas"...
Oliver Carr aka cheaper videos for more money :(
My favorite
Back in the 1960's, Poland's Moon Mission project settled on a vinegar and baking soda rocket engine design. I understand they are still working on enlarging the fuel tanks.
watcherjohnny and you're an ignorant piece of shit
no one watches your channel, give it up looser
Paul DTOM Butt hurt?
Paul DTOM someone's triggered.
Poland the only country in Europe stopping the muslim rapping invasion... Have some respect you ignorant greenhouse raised douche bags
exponentially better than Grant Thompson the king of sellouts
Freddie Scowen Thompson makes shitty content
Grant Thompson makes videos only for money.
So what if he does? What's wrong with doing work for money?
armpitpuncher theres no passion. just a hollow shell
Ramiro DY Yeah man, did you see how he couldn't even get this child's science fair project to work, someone get him a nobel prize.
I guarantee the bearings on that skateboard are old and not working very well.
I guess if he oiled the bearings it would've worked. You can see that soapy water already makes things better and in the end of the experiment the skateboard looks more like it "wants" to move.
If he had good bearings the 5-ish% HCL fumes would have ruined them anyways.
XOLiD Nah, they're Walmart bearings, they already suck.
A plastic pennyboard would be perfect for this as well.
I know about kryptonics wheels.
I was thinking, "Cody is doing a Braille Skateboarding entry?".
14:14
You got a lot of pressure on your bladder there, Cody. :)
Skelpolu thank goodness for shadows :P
"Watch through some of the ads on my channel" I'm dead 😂😂😂
I don't have any vinegar. Can I use cheese instead?
If you let cheese rot, doesn't the mold turn acidic, so kind of yes if I'm right? Someone help me out
No. cheese is too fat and lazy.
@@tankguy621 yes
Then that would just be an SRB.
*Not accounting for the baking soda being in water
Cody giving instructions for kids is my favorite thing it’s so chte
Should've used a valve for the fuel inlets...That will help you get higher thrust with a smaller nozzle :)
Screw Elon Musk, Cody is getting us to mars!
Sherlock Bones on the back of baking soda and vinegar
+Sherlock Bones
Why Mars? Isn't Venus better, well unless your a surfacist.
+Duck Chop
How so? You get some protection from the solar wind despite not having a magnetosphere. You have a longer time to deal with a leak in your suit or blimp or room than you would on Mars or in space. You get closer to Earth gravity which is important to health, and you get decent amounts of sunlight which is good for plants and solar panels.
You don't die faster there compared to Mars, well unless your a surfacist.
Dude the average temperature there is 864 degrees fahrenheit.
Edit: I abandon this comment thread, Joseph is a troll.
lol
Well lets try this again, but this time with conc. sulfuric acid and caustic soda as fuel :D
Let's try again with hydrazine and fuming nitric acid as fuel
that escalated quickly
@@sergiomorales4009 holy damn
Caustic soda would actually perform worse. It’s the CO2 that drives this
Caustic soda will just produce tons of heat, no co2 gas
this about as impressive as the North Korean missile program
No they can't do this
Nicholas' Trombone They just launched another missle today.
Nickolas McCollum just made my day
well, if you've checked the news lately, they have finally made icbms that could possibly reach Alaska
It does look like it'd be fun to experiment with. I'd try
1) using a longer reaction chamber.
2) Adjusting the speed of the pumps.
3) using more concentrated components.
4) using a hopper to feed the soda in dry.
5) probably way beyond a science fair project, but a pulse system that only releases the pressure when it's strong enough to move the board.
Of course, I've never built a rocket in my life, & these are mearly what I'd want to try. :)
I used to play with baking soda and vinegar as a child but this is taking to a whole new level. I love it.
Aah, childhood memories. Throwing Kinder Egg grenades laced with baking powder and water...
Benjamin Antman illegal
Unless you live in Europe.
Benjamin Antman it brings me back to my childhood days in mother Russia throwing Moldov Cocktails into my neighbors living room and the homes of government officials.
Kinder Egg grenades are why they are banned in the U.S
ahh, the good ol days, when you just casually use human bones to kill a deer.
Cody found your channel a couple of months ago and love it. What is nice is you have something for everyone of all ages. With this project if you were to point the jet more towards the ground or place a wall behind so then it has something to push off of. This did bring back memories of building a paper mache volcano in grade school and using dye coloring with the vinegar and baking soda mixture.
Mad Dog
Except rockets don't need things to push off of. Real rockets work in space with the same principle as this.
Pushing off of something could work, but it ruins the whole "rocket" idea because of why it works: if you place a board or something in the exhaust stream of the rocket and bring it close enough to the motor you cause a restriction of the flow that backs up into the nozzle. This back-up raises the pressure in the nozzle, which increases thrust, BUT as soon as the rocket moves at all you have to chase it with the board while continuing to push the board forward against the exhaust pressure. You could just as easily turn off the rocket motor, push the board all the way up to touching the nozzle, and just push the rocket forward with the board. Having the motor running provides no extra benefit.
try it with diet cola and mentos
Hybrid fuel rocket
Frederiks Eidins
Hold on i don't want my fucking house to explode
Keyboard Warrior Never thought of mentos + diet cola as hybrid rockets before
You must be less than 4 years old, Charlie.
It's not a hybrid rocket per se, as the menthos acts more like a catalyst to release the CO2.
Who can possibly dislike this video? It’s probably the most honest video out there. No clickbait, no scamming, no constant subscribe button on screen. Just science explained by an awesome dude.
Any other TH-camr would record on a hill. Cody's integrity shows.
Every night before bed, I pray to Cody to save humanity from itself.
"watch my ads"
TH-cam: im about to end this man whole career
Which is more powerful baking soda and vinegar or diet coke and mentos?
Yes.
@@H3wastooshort its a meme. You answer with yes to any yes/no or versus question. For example:
Game reviewer: hey is this a bug or a feature?
Bethesda: Yes....
Both. Vinegar and diet coke with mentos and baking soda. And, for good measure, gumweed jet fuel.
I did this and credited to your video.
Also told them to watch the ads
Pics or it didn’t happen
1M Subs! Gratz Cody! You deserve it! Keep up the awesome videos and NEVER lose your down home spirit!
I think that using actual chemicals to create the thrust for the rocket would be an amazing idea for another video.
BenPope10 I mean to be fair Sodium Bicarbonate and Acetic acid *are* "actual chemicals," but I see your point.
BenPope10 i think using no chemicals would be even cooler.
like peroxide and bleach
All matter is chemicals
If it's rp1 and lox rp1 is an hydrocarbon rp1 is just purified kerosene and if it's hydrolox then it's just two atoms I dont know if those are chemicals but if you're talking about hypergolics those are defenitly chemicals like hydrazine and nitrogen tetroxide
I thought this was a ColinFurze video judging from the title and thumbnail
AGamingPanda yeah same lol
same
AGamingPanda I would love to see a ColinFurze Codyslab collaboration. It they don't make you love science, nothing will.
AGamingPanda VERY fast skateboard rolling at INCREDIBLY high speeds
Critical Mass there is!
Wouldn't putting them in parallel increase the pressure more than if they're in series? Having trouble getting my head around it. If the pumps are of equal power, then only the first one would have any effect, right?
Two pumps in series can pump water twice as high where in parallel twice as fast.
Adamast But twice as fast is what we want. Momentum is mass * velocity, so those are the only things that we can change. We could put something in the liquid to make it more *mass*ive, or increase the speed at which it's ejected. (The latter is what Cody did by adding a nozzle)
With high I mean pressure (that's what will give speed) were fast is about the rate of flow.
Working backward. We want the ejected fluids to be going fast (Higher Specific impulse).
Bernoullis Principle says that there has to be a pressure drop between the slow moving fluid and the fast moving fluid. (Think of it in terms of potential energy being turned into kinetic energy)
So the fluid inside the chamber is at a higher pressure than the outside.
The pumps need to overcome that pressure difference to maintain fuel flow.
Each pump is producing a pressure difference between it's inlet and outlet. If the pressure inside the chamber exceeds the pressure difference the pump can produce, the flow will be backwards through the pump, and the engine will go through a burn/refill cycle instead of continuous operation.
Putting pumps in series adds the pressure differences. Thus they can pump fuel into a higher pressure chamber. Thus the nozzle can be smaller and the exhaust velocity higher. Higher Isp => more efficient engine.
If you also keep the RATE of flow from dropping too much, you also get higher instantaneous thrust.
Jayyblamesthegame Incorrect. Adding pumps increases head which increases the potential for pressure but does not automatically provide pressure by itself. So long as the same amount of water is moving through the same amount of pipe at the same height, the pressure will be the same., no matter how many pumps are running.
Putting the pumps in parallel will pump more water which will increase pressure in the same sized pipe.
Reducing the pipe size for the same amount of pumped water will increase pressure.
Or, increasing the height that the water is pumped to will increase pressure as gravity will increase the pressure with the height of the water column on the falling side.
The first works adding two pumps in parallel.
The latter two will work for one pump up to its head limit. Only then will adding a pump in series actually increase pressure.
I have learnt more from this channel and the King Of Random than I have from 8 years of school (primary and high school so far)
I love these videos, I love seeing you reason through a fun project like this, and my kids do too. Thanks for doing what you do, Cody.
What, no Dr. Pepper and Mentos as propellant?
Its so annoying how the skateboard is backwards, great vid though
It's just easier to set up that way because of the kick-tail, If he wanted to make it go forwards he would have had to elevate the reaction chamber to above the kick-tail in order for it to be level.
AngusLeslie I believe this channel is above your IQ level
Or not, Intelligent people often get annoyed by the silliest things....(#Sheldon Cooper)
Richard Bergh I mean I do have a degree in chemical engineering but okay.
lol
Also remember that as the fuel is spent the rocket's mass decreases.
Why not cut the mass in half by putting solid baking soda in the reaction chamber and pump in an acid?
Hybrid rocket engine!
The name for the effect caused by the nozzle and the reason it improves the flow and thrust is called the Venturi Effect. Would love to see some scientific explanation and demonstrations on the topic from you Cody! Airflow and liquid dynamics are always fun to learn about.
Remember kids to credit Cody and watch a few of his ads so he makes some money.
DIY boosted board 2017 LOL
Bobby8nyc/Daddy_fit
💯❓
Hahahah oats
Always trust a guy with mismatched socks!
Sleeping Hedgehog , but never trust a machinist with all 10 fingers.
Maybe you should try with very strong acid and base
Very thoughtful of you to make a video for the younger viewers
Love the twist of using the pumps to feed the chamber. Interesting twist on the grade school classic. Happy to see new content as always, man!
Shaggy + Velma = 13:45
this
Zepherus Reaper cannot unsee
how is this comment not the top comment
Zepherus Reaper ( ͡° ͜ʖ ͡°)
Will your grass survive the soap/vinegar/muriatic acid combination?
Well it look like you did not think at all...you are saying he's basically stupid for asking if what very well could be still acidic will kill the grass. Ironic.....
What came out are basically salty water.
RIP Lawn.
im glad someone else noticed all that salt water he was spraying out was draining out into the lawn, for a smart kid he can be pretty clueless apparently rofl.
+Witches Bane its not salt water
Tasty Bagel .. *facepalm*. SODIUM bicarbonate + vinigar. vinigar reacts and releases carbon dioxide... leaving.... Sodium. aka salt.
Alright then, i stand corrected. Also, a good tip if you want someone to read your reply is to not start with *facepalm*.
Apparently you idiots are all unaware of the existence of a thing called road and sidewalk salt that is applied to these surfaces at hundreds of times the quantity seen here every winter with little effect on grass. See there's this other thing called rain... dumbasses
Fun project as always Cody!
I think if you would make all containers sealed and provide a small line back to the tanks for them to also pressurize,
the pumps would be able to put liquid trough with a smaller nozzle resulting in more thrust.
Kanyon must be so relieved that you made a project that doesn't explode, melt, or bubble.
"This is a good starting point"
Tune in next week when Cody goes to the moon!
"Compared to the many other things i do on this channel, this is rather tame"
Thinks of the times you dipped your bare arm in mercury, played with a geiger counter in front of radioactive material and took a sip of cyanide.
Don't forget the explosions!
Which ones?
Bradley Maynard He sets off lots of explosives. In his mine, in vacuum chambers, in his shed, outside. Some with lots of protection, others with very little. He's even made nitroglycerin. Yeah, there's lots of explosions on his channel.
Fun experiment
Man, I can't tell you enough how much I enjoy your videos. I'm not very smart, but this stuff is still interesting and fun to watch. Thanks for sharing!
There is a lot of research on "soda and mentos" nozzles For an engineering class that was our only assignment one semester. It was to design a rocket car using diet coke and mentos. My team and I went a different route. Instead of just relying on thrust I thought it would be a good idea to make it like a water wheel so you get get a little extra energy out of the thrust. Our car was not the fastest but we got the longest distance. We got an A on our assignment which was pretty sweet. And we got a note from the instructor who said he had never seen anyone try that idea before and thought it was genius. This little note stroked my ego a little bit.
The problem is the shit ass bearings in that Walmart board
How long do your videos usually take to make?
Wolfyplaysmc4 10 minutes
tyten olaug Seems like an accurate number, thanks!
My science fair project was an tin lifter. A triangular lifter made out of tin foil, toothpicks and very fine copper wire that was hooked up to high voltage causing an electromagnetic lift.
You could smell the ozone after it's lift
Your next project could be how to edit a TH-cam comment.
Technically its ionic
So far I’ve never had a science fair EVER.
Top Cat nailed it 👌👌👌😂😂😂
This is certainly better than what I did as a kid. Dropping clumps of baking soda into the bottle as quickly as I could. But it occurs to me that instead of pumps and open top bottles, use containers that can hold compressed air with a tube going to the bottom of the liquid so when valves are opened the liquid is forced much faster into the 'combustion' chamber. It would also reduce weight and the compressed air would even add to the thrust.
Cody'sLab, I know you probably won't read this but...
Keep up the good work. Ignore the idiots who have whined about production quality, crediting request or the ad plug.
I like many other have watched your videos for years (longer than most other changes) and that's not because you have preaty graphics or 4k footage, it's because you give a real life look into how a real person can do things. There is much more value in seeing you mess up and make adjustments and corrections than getting a step by step guide like most "competing" creators.
Also thank you for reminding people to give credit for science fairs, it's a good practice for children to learn and usually required in academic circumstances...
Have a good one, and hello from Australia!
i want more of these videos! NaOH and HCl fueled one please.
AceandDuce or at least continue his nitric acid/diesel rocket
talha yaprak NaOH and HCl wouldn't produce any thrust
Toby Charles why not?
talha yaprak naoh and hcl dont produce any gas
jasper samson yeah i meant sodium carbonate and had a brain fart
Make hybrid rocket that uses gasoline and liquid oxygen
that wouldn't be a hybrid. a hybrid uses a solid fuel such as rubber
freeze the gasoline and run O2 over it?
Real Rocket Scientists use Refined Kerosene
Freddie Scowen I think it could be a gas-liquid, gas-solid, and maybe solid-liquid
How do you get gasoline to burn below its freezing point (-43c) ? you cant.
Do more videos on your new telescope. I want to see a good video of somebody just stargazing
Cody you should make a video on what other common household chemicals can be used to make rockets. Give kids something new to make for science fairs.
I really enjoyed this experiment. It was fun to watch a simplified rocket engine and how they work.
Hi, I'm Scott Manley.
"Watch through A few of the adds on my channel."
xdd
Travis or get TH-cam Red and don't...
i use a thing called ad block cause im a scum
xd
ad*
Try putting in bearings like red bearings and it will go exponentially faster
what are the values on that capacitor?
Cody's odd socks and shoes, what a joker, gotta love him
If I was a millionaire,I would sponsor your channel.I love your content and how down to earth you are.
Great video Cody,you should do more of these simple "how to" videos,very educational.Keep it up mate 👍🏻.
impeller pumps do not work that way...
bovinespongiformflu Yea, I really doubt that they are in any way additive. Each pump moves a certain capacity of water for the given motor input. Increasing pressure would require pushing into a narrower channel or moving more mass. The latter is not possible because the mass going though both pumps must be the same.
I concede that the second pump might have an easier time as the water has been pre-accellerated and thus pull the first one along slightly, but I would expect that effect to be minimal.
Yeah, they do. Google centrifugal pumps in series.
Evan Van Slooten Google says that pumps in series increases HEAD, not pressure. It also confirms my assertion about flow rate. Head, without decreasing the size of the hose from one pump to the next will result in equal pressure. If he wanted increased pressure he could have placed the pumps in parallel to push more water through the same sized pipe, he could have reduce the size of the intake pipe, or he could have raised the height path of the pipes. These would work for a single pump up to its head limit. THEN if the head was insufficient to increase pressure in the line, he could have added another. As it is, the second pump is superfluous.
Pressure = .434Head * Specific Gravity for a given liquid. As head increases so does pressure.
The head pressure you are referring too is the maximum possible pressure that the pump is able to exert. However, in order for a system to reach that pressure, the system must be able to push back on the pump with as much pressure as the pump capable of pushing. If not, the system simply gives way and releases the pressure before it can ever reach the pumps limit.
I have extrapolated about this in other posts but the short answer is this: if a single pump is able to pump, then there is no pressure or volume advantage to using the second. It is superfluous. If the back pressure exceeds what the first pump is able to produce, only then will the second pump actually increase pressure to the system by doubling the maximum POSSIBLE pressure.
Still, it does not automatically indicate that the pressure in the system will be doubled. The actual working pressure will still only equal what the back pressure can exert as a load on the pump. The pump sets the maximum pressure and the load determines the actual working pressure.
Is this Family friendly Cody?
Probably to appease the demonetization gods
No
well once in a while this is kinda nice isn´t it? it´s still interesting not dangerous at all. why not? it doesn´t need to always be dangerous to be interesting and he did explain what´s going on in the big guys
Ehm, combustion chamber? Acid-base-reaction chamber?
Nevermind, isn't using pumps, plumbing pipes and so on a bit overkill for such an inefficient rocket motor?
Seemed like a spontaneous idea and video. Nothing wrong with that. Plenty of Cody's videos are like this. I don't like the fact that consumers of youtube videos are now acting as though they're owed higher quality stuff.
At the end of the day, these videos are just Cody sharing what he's doing with you and if you don't like it, you didn't have to watch it. If the video let your expectations down, your expectations are too high.
Cody you are the best. Love your real, honest videos. Wishing you the best sir!
Cheap, safe, and non-toxic hypergolic fuels... I like it!
Unfortunately we are not allowed to use vinegar in SF projects. :-(
God :-O Why? :(
Calcium Chloride and baking soda also produce gas in a reaction. Use those.
Use hi test peroxide instead, that'll show them
God :-O use fluroantomonic acid, should give a nice result
use kerosene and LOx
Make a liquid fueled vacuum cleaner.
He definitely didn't "forget" to put the nozzle on before the first test. He was worried that the nozzle would cause thrust enough from the pump power alone. I think it's really awesome that he did that, though, to give it a stronger effect on kids.
Have the nozzle point down. The ground can’t move (by much) so to conserve momentum the skateboard can go faster. The thrust is directed into the air air which can move.
Cutting things are rather dangerous says the legend who ate cynide
Fuel it with liquid Butan and warm Water 😅👌🏽
Pretty lame for you Cody. You could have done much better.
The wheels werent oiled
Cody, the epitome of sartorial elegance...😃
I'm glad you didn't pressurize the tanks, because I'm pretty sure the thrust generated by the external pressurizer would have far outweighed that of the chemical reaction.
You have to do better than this. This is like a joke.
he should put more reactive acids into it
George Washington are u stupid it's for kids dumb ass
I will watch all the ads for you Cody... ALL OF THEM!
You impress me once again Cody, best videos on TH-cam. Keep up the work man.
Cody would be absolutely amazing to listen to on a podcast!!