In my home village there is a castle that was bombed during the war and later re build. Throughout my childhood my eye sometimes fell on a large "bronze flower pot" that the nuns who lived in the castle used as ...well a flower pot. I never gave it much attention but it later turned out this thing was actually the nozzle of the V2 rocket that blew up the castle during the war. Pretty mind blowing to find out there was a priceless rocket science relic right under my nose all this time.
Oh god YES YES YES I needed this because so many reasons. Please do continue and make this a regular series, if it doesn't turn out to be too time consuming. KSP taught me a lot about rocket science, so much I actually went back to my studies, and now I want to know about what I don't know. Yet.
me too. I haven't stepped foot in a college class in 25 years and was able to competently speak the language with a group of raytheon rocket scientist and missilears I met (two separate groups) all based on what I learned from tons of self interested research I have done since I adopted ksp from back in version 0.15
Oh yeah that clearly needs to be continued... Thanks for teaching us interesting stuff, Scott :) Maybe multiple-body physics and their implications in terms of orbital physics (such as the existence of Lagrange points) would be another interresting fact that this great game doesn't teach...
Those last two engines that you mentioned, would make a great addition to the game. The linear aero spike would work and look great, on certain SSTO designs.
I thought of a more intuitive explanation. We want the gas to go directly rearward, in order to push the rocket equally and oppositely forward. The nozzle is designed to expand the exhaust gases to ambient pressure so that it only travels rearward. Without a nozzle, the exhaust would expand in all directions, and this would result in thrust every direction which would cancel out a lot of thrust. The nozzle can be thought of as a lens, a collimator, that guides the exhaust gas into as close to a laminar flow directly out of the engine as possible.
KSP should be a required class in high school! No text book covers a whole topic, that's just reality...what KSP does teach in a very engaging way vastly outweighs it's short comings.
+Scott Manley I caught a few, one you leaned in probably to cut tape. lol. but either way very informative, I have learned a lot from you about rocketry not just kerbal but real life information. thanks.
cant you see, its so obvious! kerbin is acutally flat! the devs simply made the game reduce gravity as the player accelerates and use a high fov lens to emulate curvature!
This is really interesting and i want to see more stuff like this. Also would be so awesome if you had quick talks like this but then made a follow up that would explain things in more detail and show some of the math or additional principals used to make the things work.
Would love to see more of these types of video! After playing KSP for so long and with it completely changing my interests in math and science, I now love learning how rockets actually function. After playing for more than two years and reading / watching videos on different topics, I feel I'm pretty well informed. With this video for example, I learned a few new things and had some previous question / uncertainties answered. Keep up the fantastic work!
Now my favorite video from you M. Manley . Informative , professional , precise . Really great work right there ! Keep up your excellent work ! Fly safe !
When a gas expands, it cools down, as heat energy is converted into kinetic energy. The more it expands, the more of the heat gets converted into useful work. In vacuum, an infinitely large nozzle would in theory give you 100% energy efficiency, and smaller expansion nozzles give you efficiencies roughly equal to the Carnot efficiency for the given exhaust temperature.
Thank you, that was helpful. By converting heat to kinetic energy, do you mean hitting the side of the bell, pushing the spacecraft? So why is it that first stage nozzles are so thin? Is it, a tradeoff where it gets high thrust but at "low" efficiency?
***** Just think of the case where you have the engine on a static test stand. Then the kinetic energy I refer to is the kinetic energy of the gas in the reference frame of the test stand. Regarding first stage nozzles, there are two reasons. First, smaller nozzles means you can fit more engines if the bottom of the rocket lacks space. I believe that the first stage merlin engines on the F9 have slightly smaller bells than optimal because of a lack of space. The second issue is flow separation which Scott mentioned. If the nozzle is too big the flow stops sticking to the edge of the bell and becomes chaotic. If there is enough space to fit them, first stage engine nozzles are usually made as big as they can be made without hitting this flow separation limit.
First stage nozzles need to be smaller because at low altitude atmospheric pressure is higher than the exhaust pressure at the edges of a big bell, air is forced to creep into the nozzle and introduce turbulence in the exhausting flame. Shuttle engines have a very high exhaust power which keeps the pressure inside the bell higher than the atmospheric pressure. So bigger bells need higher power at low altitudes to work.
YAY! Thank you for finally getting around to more science! I am studying physics and many of my classmates and I play KSP as well as watch your videos. We are all very excited anytime we can bring our passions for science and gaming together as you might imagine.
There was a study many years ago on the original doom, can't remember for just what. It ended with a line saying something along the lines of: Thanks to [teacher] for letting me play doom as part of class - [name of author]
I love your science videos! I actually knew about engine nozzles before I started playing KSP (and before I understood orbital mechanics). I was asking for an option to tweak the nozzles of the engines and change the specific impulse. I could probably make a slider for it with no visual effects on the engines, but I would like to have the length of the nozzle change visually. Can someone make a mod for that?
That sounds like it'd be a fairly easy mod to make. I'd be a bit surprised if it doesn't already exist. Though it's a fairly niche, geeky-even-by-KSP-standards idea, so it may've been made for an older version and not been maintained...
+kendokaaa Procedural parts srbs can only swich between vacuum and atmosperic nozzel. I would like to have a procedural engine with tweakable specs like the lenght of the nozzel and other stuff.
Fascinating as always, Scott. Consider this another strong show of interest in this type of video. Hurray for anyone doing public science education and science outreach.
Just absolutely wonderful! Which is not a surprise, as this channel delivers through and through ALWAYS!!! Keep your brilliant work up, Scott. Much appreciated.
Props for mentioning choking the flow, this is so critical to any form of supersonic flight propulsion. I would love to see a video explaining why propellers can't be used near mach 1 tied into why a choked flow behaves differently than a non choked flow when expanded making faster propulsion possible. So many people unfamiliar with this aspect of fluid dynamics don't connect the ideas together with the basic definition of a choked flow and the speed of sound to make a more complete understanding. Took me a while to wrap my head around it when i first learned about it, would have been better off with your videos!
Hey scott! Have anyone made a nozzle that expands as the pressure drops? or would that be too flexible and fall apart due to the engine pressure? Thinking of nozzles like those seen on jet fighters
I imagine it'd be really hard to make. Considering the surface finish of the nozzle is quite important - and like you've probably seen, the "nozzle" on a jet fighter engine is pretty rough looking. I think the gains would probably be outweighed by the losses. Who knows. Maybe we can invent some magical material that is super resilient to heat, holds its shape perfectly, yet is able to be shrunk or expanded at will.
if the engines can have multiple relights, then the extending nozzle design can first start out without it being extended, then shutdown at some point in flight, extend, then relight. I don't know if that's too complicated or worth the extra ullage thruster's weight though...
I remember watching this video 4 years ago when it came out, and now here I am about to do my fluids 2 exam, covering converging-diverging nozzles. Thanks Scott!
I highly highly anticipate the next part of the series! As other folks have said, I've gone back to school for engineering but kept playing KSP, so I'd love to know more about the gaps in my knowledge
Wow, I already knew you could 'burn' NatureHacker, although that doesn't take any skill whatsoever :P, but I didn't know you could 'burn' smarter people (Nearly anyone is smarter than NatureHacker)
Definitely like this idea of discussing the things you don't learn in KSP. I've been super interested in rocket science ever since I started playing and I can never get my hands on enough reading material! thank you Scott!
Good video...I hope you make a whole series like this. KSP is amazing, and more than anything can provide a layperson with the vocabulary to talk about rocket science. But I really do appreciate knowing where its accuracy is limited, so that I can better understand how the real world works.
They should make the game different by putting guns in the hands of the little soldiers the Kerbals are and change the name to modern kerbfare or something and make a battlefield type game in space, it's gonna be so cool harnessing the power of stars to 360 noscope other kerbals thats what this game is all about right?
Thanks for another great science explanation Video. I love listening to you explain the science behind KSP and now the science that KSP does not teach us. Hopefully we will see more of those videos, because you make a really good teacher and always keep it interesting!!! Greetings from Austria!
you can see the difference in the exhaust plume at different altitudes. aside from vectoring, bells create a thermal cushion yeah? like apollo 11 and the dark band of unburnt kerosene that causes the flame to stand off and i always wondered how that could be if combustion had already taken place, or was that just kerosene dumped around the bell (at turbine speeds) for cooling?
I love your videos Scott and my son does too, especially ones like this where you explain a practical rocketry concept with passion and excitement which rubs off on the viewer. Keep up the great work!
very cool video, hope to see more of this because while i have no plans to go into rocket science, it is cool to get a basic idea of some of the things they have to care about when designing and building rockets
Professor Manley! I love the video game stuff you do and seeing all this educational content on the same channel is blowing my mind! PS get a teleprompter. It's so worth it for videos like this!
Great video. Love to see more rocketry information. And thanks for explaining the "diamond exhaust". I always wondered what was involved in their formation.
What I think is interesting is that at the end when he says that the poodle engine is smaller than the mainsail and that one day it may get fixed. I watched this literally the day after KSP 1.10 was released which added an option to change the poodle engine to a single nozzle that is much larger. Prediction 100 from 4 years ago.
God, but that clip of the shuttle's main engines igniting is the sexiest twelve seconds of footage on earth. The way the combustion builds and suddenly condenses into an organized thrust diamond, and then all three bells gimbal inward as the shuttle starts pushing against the launch clamps like an excited greyhound -- Gets me pumped for rocket science every time.
Rocket surgery: something similar-ish happened with one of the early Mercury test launches. The heat shield on the capsule was made a little bit too large to fit in the rocket, so they made a rig out of wood, bought a router from Sears, and just cut the heat shield about half an inch smaller around the edge.
Scott, one thing that might be of interest is augmented jet engine nozzle design. They use a convergent/divergent design that basically squeezes the exhaust gasses to achieve the same thing.
I knew the nozzles on rocket engines were designed to compress and shape the burn of rocket fuel for maximum thrust but I didn't know they were also designed for efficient exhaust into different atmospheres.... Learn something new everyday, thanks Scott
Forgot to mention variable geometry, lot of jet fighters have "turkey feathers" on their engines. Not only compensating for pressure differential with change of altitude, but a whole range of thrust being used.
Love the video! I am planning to permanently move to Mars with my fiancé, and to make myself a more attractive candidate I am planning to go back to school in aerospace and then try to get a job at SpaceX. Your videos are very educational and interesting, and do a great job teaching some of the lesser-known rocketry and space principles.
scott, love the rocket science videos and all your ksp stuff!! I'm an amateur rocket nut, soon will be trying to fabricate my own solid rocket nozzles. There are a few good aerospike designs on TH-cam that I like. keep the science and rocket science vids coming mate
Hey Scott I'm majoring in aeronautical engineering and this video was really cool. Having you explain something I've already learned actually helped me understand it more. I know Kerbal Space Program is more rocket based, but I'm curious if you'd be willing to do a video on jet engines too. Thanks!
Thank you! I have been needing this for so long and never expected the hero of rocket science to do it!! I haven't even watched the video yet and I am so excited! thanks Scott
That was really cool to know Scott! So that's why Apollo's engine used in space had a HUGE nozzle! I didn't about these things, it's really interesting :)
In my home village there is a castle that was bombed during the war and later re build. Throughout my childhood my eye sometimes fell on a large "bronze flower pot" that the nuns who lived in the castle used as ...well a flower pot. I never gave it much attention but it later turned out this thing was actually the nozzle of the V2 rocket that blew up the castle during the war. Pretty mind blowing to find out there was a priceless rocket science relic right under my nose all this time.
And being used as a flower pot as well!
Mind sharing some photos? It would be cool to see a nozzelpot...
this is fantastic
Junk.
Must've been some massive flowers
2:22 "Flight Hardware - DO NOT TOUCH" - note that is taped to the side, probably by hand.
Such Kerbal
The warning doesn't apply until it's taped on, clearly.
@@imbibe9891 , so it's easy, you take the warning without touching the flight hardware, then touch the flight hardware and then put the warning back
@@monad_tcp what if the warning is part of the flight hardware?
@@shunpaw820 you then scrape the warning using a chisel, that's not touching it
Scott, you would make a great Bond villain
holy shit i'd love to see this
Agree :D
nah , he will design the most efficient cyberman for doctor who, with bond inside
He just needs a scar and a cat.
you mean he's not one?
If Scott Manley did audio recordings of educational texts, I would buy them.
Oh god YES YES YES I needed this because so many reasons. Please do continue and make this a regular series, if it doesn't turn out to be too time consuming. KSP taught me a lot about rocket science, so much I actually went back to my studies, and now I want to know about what I don't know.
Yet.
Yes! Please. that would be very awesome.
You will have to pay him: ONE MILLION DOLLARS!!!! :O
me too. I haven't stepped foot in a college class in 25 years and was able to competently speak the language with a group of raytheon rocket scientist and missilears I met (two separate groups) all based on what I learned from tons of self interested research I have done since I adopted ksp from back in version 0.15
+1 for continuing. KSP is great in what it teaches but like all simulations it differs from reality in places.
Oh yeah that clearly needs to be continued... Thanks for teaching us interesting stuff, Scott :)
Maybe multiple-body physics and their implications in terms of orbital physics (such as the existence of Lagrange points) would be another interresting fact that this great game doesn't teach...
Is it just me, or does this feel like part of a series of videos one would watch to become a supervillain?
yes, the next one will be about cat care
+666Tomato666 step one, get a second to keep the first company. Or just get siblings.
If that was the case, it would be worth: ONE MILLION DOLLARS!!!! :O
one million? i'm just a small loan away from it then. :D
ONE TRILLION DOLLARS!!!
Those last two engines that you mentioned, would make a great addition to the game.
The linear aero spike would work and look great, on certain SSTO designs.
This is what TH-cam should be about. Please keep making videos like this Scott!
Scott Manley doesn't blow minds - he expands them. Good vid!
Why not both?
@@cpthornman difference
Well said !
I thought of a more intuitive explanation. We want the gas to go directly rearward, in order to push the rocket equally and oppositely forward. The nozzle is designed to expand the exhaust gases to ambient pressure so that it only travels rearward. Without a nozzle, the exhaust would expand in all directions, and this would result in thrust every direction which would cancel out a lot of thrust.
The nozzle can be thought of as a lens, a collimator, that guides the exhaust gas into as close to a laminar flow directly out of the engine as possible.
KSP should be a required class in high school! No text book covers a whole topic, that's just reality...what KSP does teach in a very engaging way vastly outweighs it's short comings.
Interactive and experimental learning is almost always better than reading or lectures alone, reguardless of subject matter.
Yeah the concept is nice but maybe SimpleRockets 2 should be used
All in one cut, too. Very informative video, thanks Scott.
+Bill Kerman there are cuts, most of them hidden by overlays
Please make this a series! I would love to learn all you know about rockets.
+MetricZero he studied astrophysics in college.
We mere mortals don't live long enough for that.
+Scott Manley I caught a few, one you leaned in probably to cut tape. lol. but either way very informative, I have learned a lot from you about rocketry not just kerbal but real life information. thanks.
Kerbal Space Program doesn't mock Flat Earthers enough...
There should be a flat earth mod for KSP.
CreeperOnYourHouse
It's not possible for the same reason why no one can mod a round square in KSP...
***** We can do it! With science!
+CreeperOnYourHouse the first versions of ksp had a plane as the earth, so there was a flat earth before in the game
cant you see, its so obvious! kerbin is acutally flat! the devs simply made the game reduce gravity as the player accelerates and use a high fov lens to emulate curvature!
Best thumbnail ever
😏
😂
😭
This is really interesting and i want to see more stuff like this. Also would be so awesome if you had quick talks like this but then made a follow up that would explain things in more detail and show some of the math or additional principals used to make the things work.
Damn, that linear aerospike engine looks sexy. Can I haz that in KSP? Maybe specifically made to fit Mk 2 tails?
Klockheed Martian shuttle engines
Indeed! The shuttle in the movie Interstellar uses a similar design I think.
I know Lack Luster Labs used to have one
There's one in the Mk2 Expansinon mod, along with a bunch of other engines.
The RLA parts pack also has a linear aerospike, but it fits 1.25m rockets.
OPT Spaceplane parts has a really nice linear aerospike.
"The magic of Fluid Dynamics" pretty how much it works in my mind...
I love that you're adding some educational segments. keep up the good work.
Great (hopefully) series!
Would love to see more of these types of video! After playing KSP for so long and with it completely changing my interests in math and science, I now love learning how rockets actually function. After playing for more than two years and reading / watching videos on different topics, I feel I'm pretty well informed. With this video for example, I learned a few new things and had some previous question / uncertainties answered.
Keep up the fantastic work!
impressive vinyl collection Scott :)
+Viorel Dehelean thank you!
I thought the same thing!
The way he explains stuff is so clear. I'm super-appreciative and also very respectful of it!
That Thwomp on the counterweight is a nice touch there Space X
I really enjoyed this format Scott! It was personal and sort of like sitting down and having a conversation with you, would love to see more of these.
MORE OF THESE VIDEOS PLEASE
Now my favorite video from you M. Manley . Informative , professional , precise . Really great work right there ! Keep up your excellent work ! Fly safe !
well... that was uh... my whole life is a lie. damn you poodle engine
Fascinating video. I really look forward to watching what you have in store for the rest of this series.
Very interesting, thank you.. Now I am going to spend hours trying to figure out why exactly its beneficial to have larger nozzles in space.
When a gas expands, it cools down, as heat energy is converted into kinetic energy. The more it expands, the more of the heat gets converted into useful work.
In vacuum, an infinitely large nozzle would in theory give you 100% energy efficiency, and smaller expansion nozzles give you efficiencies roughly equal to the Carnot efficiency for the given exhaust temperature.
It further reduces the pressure of the gas flow to be closer to ambient (vacuum) which means it's more effecient for the reasons Scott described.
Thank you, that was helpful. By converting heat to kinetic energy, do you mean hitting the side of the bell, pushing the spacecraft?
So why is it that first stage nozzles are so thin? Is it, a tradeoff where it gets high thrust but at "low" efficiency?
***** Just think of the case where you have the engine on a static test stand. Then the kinetic energy I refer to is the kinetic energy of the gas in the reference frame of the test stand.
Regarding first stage nozzles, there are two reasons. First, smaller nozzles means you can fit more engines if the bottom of the rocket lacks space. I believe that the first stage merlin engines on the F9 have slightly smaller bells than optimal because of a lack of space.
The second issue is flow separation which Scott mentioned. If the nozzle is too big the flow stops sticking to the edge of the bell and becomes chaotic. If there is enough space to fit them, first stage engine nozzles are usually made as big as they can be made without hitting this flow separation limit.
First stage nozzles need to be smaller because at low altitude atmospheric pressure is higher than the exhaust pressure at the edges of a big bell, air is forced to creep into the nozzle and introduce turbulence in the exhausting flame.
Shuttle engines have a very high exhaust power which keeps the pressure inside the bell higher than the atmospheric pressure. So bigger bells need higher power at low altitudes to work.
YAY! Thank you for finally getting around to more science! I am studying physics and many of my classmates and I play KSP as well as watch your videos. We are all very excited anytime we can bring our passions for science and gaming together as you might imagine.
There was a study many years ago on the original doom, can't remember for just what. It ended with a line saying something along the lines of:
Thanks to [teacher] for letting me play doom as part of class - [name of author]
I love your science videos! I actually knew about engine nozzles before I started playing KSP (and before I understood orbital mechanics). I was asking for an option to tweak the nozzles of the engines and change the specific impulse. I could probably make a slider for it with no visual effects on the engines, but I would like to have the length of the nozzle change visually. Can someone make a mod for that?
That sounds like it'd be a fairly easy mod to make. I'd be a bit surprised if it doesn't already exist. Though it's a fairly niche, geeky-even-by-KSP-standards idea, so it may've been made for an older version and not been maintained...
***** I did not found it yet. If it would exist i'm pretty sure it would already be a part of realism overhaul.
Procedural nozzles which varies engine specs according to how you graphically design it. Brilliant idea.
Procedural parts has procedural SRBs with expanding nozzles so I assume it's possible
+kendokaaa Procedural parts srbs can only swich between vacuum and atmosperic nozzel. I would like to have a procedural engine with tweakable specs like the lenght of the nozzel and other stuff.
Fascinating as always, Scott. Consider this another strong show of interest in this type of video. Hurray for anyone doing public science education and science outreach.
very nice video thanks for explaining those things
Great jobs love your vids
Greetings from Germany
Just absolutely wonderful!
Which is not a surprise, as this channel delivers through and through ALWAYS!!!
Keep your brilliant work up, Scott. Much appreciated.
can we please get more videos like this? please!
Props for mentioning choking the flow, this is so critical to any form of supersonic flight propulsion. I would love to see a video explaining why propellers can't be used near mach 1 tied into why a choked flow behaves differently than a non choked flow when expanded making faster propulsion possible. So many people unfamiliar with this aspect of fluid dynamics don't connect the ideas together with the basic definition of a choked flow and the speed of sound to make a more complete understanding. Took me a while to wrap my head around it when i first learned about it, would have been better off with your videos!
Hey scott! Have anyone made a nozzle that expands as the pressure drops? or would that be too flexible and fall apart due to the engine pressure? Thinking of nozzles like those seen on jet fighters
+Martin Stensvehagen temperature more than pressure i would imagine is a problem.
I imagine it'd be really hard to make. Considering the surface finish of the nozzle is quite important - and like you've probably seen, the "nozzle" on a jet fighter engine is pretty rough looking. I think the gains would probably be outweighed by the losses.
Who knows. Maybe we can invent some magical material that is super resilient to heat, holds its shape perfectly, yet is able to be shrunk or expanded at will.
Besides, you want the nozzle to get bigger over time, not smaller.
Mainly weight.
if the engines can have multiple relights, then the extending nozzle design can first start out without it being extended, then shutdown at some point in flight, extend, then relight.
I don't know if that's too complicated or worth the extra ullage thruster's weight though...
All your informative videos get me wanting to go back to school for aerospace. This one especially; propulsion is so fascinating!
2:19 I wonder why they had to put that warning up
I remember watching this video 4 years ago when it came out, and now here I am about to do my fluids 2 exam, covering converging-diverging nozzles. Thanks Scott!
What about noodles?
k i go die
rip
rest in spagheddi
never forgheddi
Mom spaghetti
+Lord Waffle I hate when spaghetti drops from my pokets in the most uncomfortable moments
Brilliant start of the new series, please keep it up :)
Holy crap, that vinyl collection...
The man was a DJ in his muggle life. There are probably 3 rooms of nothing but LP records in his home.
No shit?! Now I'm really curious about his past lives.
Fascinating compression of detail, and great visual aids! I prefer these kinds of videos over your video game escapades (as fun as they are).
What's with the cool grandpa setting?
I'm a cool dad, not grandpa for a long time.
I like that avatar
i feel as though if you had a beard and a dressing gown you could pull of the cool grandpa look quite well.
It looks like ZeFrank's background.
+chris spencer Nah. Mustache and cigar would do it.
Excellent video, Scott. I hope there is more to come. Take care.
did he have a teleprompter?
I had a laptop with bullet points laid out.
ok the reason why i asked was it seamed at some points you were staring off the camera and were reading directly off a script
Don't forget he doesn't blink!
Yes! Please create more of these videos. I enjoy them immensely.
i loved the video and why dont you do your streams on youtube and only post them after the fact and only do them live on twitch
I highly highly anticipate the next part of the series! As other folks have said, I've gone back to school for engineering but kept playing KSP, so I'd love to know more about the gaps in my knowledge
It's amazing that I have spent more time paying attention to Scott Manley than I have my physics teacher.
Thanks for this video, I'm looking forward to the next ones you put out on this topic.
i'm too slow to invent a joke
Don't worry, your parents already did.
+Delta_STW5 lol
+Delta_STW5 Burnnn
Wow, I already knew you could 'burn' NatureHacker, although that doesn't take any skill whatsoever :P, but I didn't know you could 'burn' smarter people (Nearly anyone is smarter than NatureHacker)
Brayden Toth Oh hi Brayden ^^
Definitely like this idea of discussing the things you don't learn in KSP. I've been super interested in rocket science ever since I started playing and I can never get my hands on enough reading material! thank you Scott!
Does Scott read his comments?
YES
That's sad.
Sometimes.
+Scott Manley Love ur vids Scott! You made me buy ksp. Which btw is the best game ever.
+Hampus Karlsen same
Good video...I hope you make a whole series like this.
KSP is amazing, and more than anything can provide a layperson with the vocabulary to talk about rocket science. But I really do appreciate knowing where its accuracy is limited, so that I can better understand how the real world works.
They should make the game different by putting guns in the hands of the little soldiers the Kerbals are and change the name to modern kerbfare or something and make a battlefield type game in space, it's gonna be so cool harnessing the power of stars to 360 noscope other kerbals thats what this game is all about right?
and they should just take out all the rockets aswell because all they do is distract people from the real game
And who even needs kerbals
Thanks for another great science explanation Video. I love listening to you explain the science behind KSP and now the science that KSP does not teach us. Hopefully we will see more of those videos, because you make a really good teacher and always keep it interesting!!!
Greetings from Austria!
#fix_my_nozzles
I thoroughly enjoyed this video (as with all your other videos). Hope to see more of this series soon!
first
..to get raped.
+Guest91111 ♪♪♪ 'MYSTERY BISCUIT' ♪♪♪
Can't wait for the next season.
you can see the difference in the exhaust plume at different altitudes. aside from vectoring, bells create a thermal cushion yeah? like apollo 11 and the dark band of unburnt kerosene that causes the flame to stand off and i always wondered how that could be if combustion had already taken place, or was that just kerosene dumped around the bell (at turbine speeds) for cooling?
I love your videos Scott and my son does too, especially ones like this where you explain a practical rocketry concept with passion and excitement which rubs off on the viewer. Keep up the great work!
very cool video, hope to see more of this because while i have no plans to go into rocket science, it is cool to get a basic idea of some of the things they have to care about when designing and building rockets
I like the format of this video, hoping to see more in the future :)
Your voice is gold! Keep up the fantastic videos! Im an airline pilot and in love with KSP, with your vids on the background :D
I finally understand shock diamonds. There's always a great nugget of info in your videos that keeps me coming back.
Thank you!!! this was very educational! Please continue this series!!!
Great video, thank you for that. It would be nice to see more episodes and even deepen the science part of it a little. But still great job Scott!
Great video Scott, always like the way you make stuff easy to follow.
Great info and delivery, genuinely look forward to more of these!
That looks like a damn fine Vinyl collection you have there mate. That was good to listen to it filled in a few gaps in my own knowledge
Professor Manley! I love the video game stuff you do and seeing all this educational content on the same channel is blowing my mind!
PS get a teleprompter. It's so worth it for videos like this!
Great video. Love to see more rocketry information.
And thanks for explaining the "diamond exhaust". I always wondered what was involved in their formation.
Great idea for a series! I look forward to learning more in future.
Thanks for the interesting video Scott - looking forward to more videos in this series.
What I think is interesting is that at the end when he says that the poodle engine is smaller than the mainsail and that one day it may get fixed. I watched this literally the day after KSP 1.10 was released which added an option to change the poodle engine to a single nozzle that is much larger. Prediction 100 from 4 years ago.
God, but that clip of the shuttle's main engines igniting is the sexiest twelve seconds of footage on earth. The way the combustion builds and suddenly condenses into an organized thrust diamond, and then all three bells gimbal inward as the shuttle starts pushing against the launch clamps like an excited greyhound -- Gets me pumped for rocket science every time.
Rocket surgery: something similar-ish happened with one of the early Mercury test launches. The heat shield on the capsule was made a little bit too large to fit in the rocket, so they made a rig out of wood, bought a router from Sears, and just cut the heat shield about half an inch smaller around the edge.
Scott, one thing that might be of interest is augmented jet engine nozzle design. They use a convergent/divergent design that basically squeezes the exhaust gasses to achieve the same thing.
I really enjoyed this Video, keep the more "science-than-gameplay" Videos coming :)
I love the blue tape and scratch paper sign on the rocket nozzle saying "do not touch".
I would love to see more of this type of videos explaining rocket science that KSP don't cover. Very interesting.
I love this video series already. Can't wait for more!
I knew the nozzles on rocket engines were designed to compress and shape the burn of rocket fuel for maximum thrust but I didn't know they were also designed for efficient exhaust into different atmospheres....
Learn something new everyday, thanks Scott
Very cool video series. look forwards to your future episodes
Awesome as usual, great work. I really wanted to say i purchased ignition as an audiobook and thank you for recommending it.
I could listen to this for hours, can't wait for the next one!
This is awesome.
If you could make a proper serie out of this it would be so cool!
this was one of your best videos yet. I love the science centered videos.
Forgot to mention variable geometry, lot of jet fighters have "turkey feathers" on their engines. Not only compensating for pressure differential with change of altitude, but a whole range of thrust being used.
Love the video! I am planning to permanently move to Mars with my fiancé, and to make myself a more attractive candidate I am planning to go back to school in aerospace and then try to get a job at SpaceX. Your videos are very educational and interesting, and do a great job teaching some of the lesser-known rocketry and space principles.
I've never played Kerbal, but I watch almost every one of Scott's videos because of his excellent delivery and information.
scott, love the rocket science videos and all your ksp stuff!! I'm an amateur rocket nut, soon will be trying to fabricate my own solid rocket nozzles. There are a few good aerospike designs on TH-cam that I like. keep the science and rocket science vids coming mate
Hey Scott I'm majoring in aeronautical engineering and this video was really cool. Having you explain something I've already learned actually helped me understand it more. I know Kerbal Space Program is more rocket based, but I'm curious if you'd be willing to do a video on jet engines too. Thanks!
Thank you! I have been needing this for so long and never expected the hero of rocket science to do it!! I haven't even watched the video yet and I am so excited! thanks Scott
Hi Scott. Long time watcher. In fact yours is the second longest channel I've subscribed to. Love these educational videos. Thank you.
Really enjoyed this episode. Keep it up Scott!
This is going to be a really good series, I can feel it. I might suggest either drag forces (along with the area rule, etc) or n-body problems.
That was really cool to know Scott! So that's why Apollo's engine used in space had a HUGE nozzle! I didn't about these things, it's really interesting :)
Thanks Scott! Informative and interesting as always! Love your channel!
This is a great idea for a series. Cant wait to learn more