I built a rocket engine in my garage - it makes shock diamonds!!!
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- เผยแพร่เมื่อ 29 ก.ย. 2024
- This rocket engine is by far my most advanced propulsion project to date, being the first to consistently achieve supersonic exhaust. This project has been a great educational process as I learned about basic rocket science. I hope you can also learn something new as you follow me in this adventure of engineering and discovery!
Be sure to comment, like, and subscribe if you would like to see more rocket engine videos!
check out a related song on my other channel: • Let There Be Thrust
Seriously, hand shaping your proto nozzle for the win!
Awesome, next time you should use pure oxygen in gas. 🔥🔥🔥
Do you know @notmadrocketscientist1902's channel? He is doing a project similar to yours, his engines are getting better and better, but I think he doesn't use microcontrollers and that makes him progress slowly.
Better and better - well thank you. Yeah, slow progress but progress anyway.
here at 2.08k subs and 1.7k views
BRO! That liquid demonstration of nozzle expansion is AMAZING! holy shit
I'm super impressed with everything...this is crazy amount of skill and work!
beautiful work! I would love to see you make more engines of various designs.
Fantastic work!
Scientific approach, great measurement techniques and a pathway to improvement. Great job Ayden!
Are you in college, or home schooled?
I am currently studying mechanical engineering in college
Just entering middle school this fall 2024. LoL
Aerospike engines next!❤
Dude, my first bump into your channel, I love it! That is some badassery in motion. Scaled up, that would be a jaw dropper.
If you are having problems with unreliable ignition and/or unstable combustion when using a gaseous hydrocarbon fuel, you could possibly solve this to some extent by running the rocket motor in a fuel-rich condition. Not just slightly above stoichiometric either - the ideal hydrocarbon to oxygen ratio for a rocket is where the hydrogen component is oxidised to water vapour and most of the carbon component is oxidised to carbon monoxide rather than carbon dioxide. For the simplest possible example of CH4 + 2 O2 ---> 2 H2O + CO2 (complete combustion of methane), you would reduce the amount of oxygen used by exactly 25%. You can do equivalent calculations to find the ideal ratio of fuel to oxygen to achieve a similar outcome for other hydrocarbon fuels, such as the propane you were using here.
This has several beneficial effects:
(1). The most important effect is the reduction of the average molecular weight of the gases in the rocket exhaust. This is important for performance and efficiency, since lower molecular weight components are exhausted at higher velocity, for any given temperature. The higher the velocity of the exhaust components, the more thrust you get.
This is why any "hydrolox" rocket (hydrogen fuel, oxygen oxidiser) is always run as fuel-rich as possible, to get as much unburned hydrogen into the exhaust as possible - hydrogen is the lightest possible exhaust component, so has the highest possible exhaust velocity.
(2). It reduces the energy output of the reaction happening inside the combustion chamber of the rocket and therefore reduces the temperature of combustion, meaning lower thermal stress on the hottest parts of the rocket - injectors, combustion chamber and nozzle.
(3). Reducing the amount of oxygen the rocket has to carry will naturally increase the amount of fuel it can carry for any given total weight, which gives some extra range. This last one is of course not relevant to an experimental rocket motor on a test stand, but it would be relevant for an actual launch vehicle, if the rockets you are testing are eventually developed that far.
Nice!!! you could try those paintball tanks as air source. Some of them can handle more than 3000psi and the compressor to fill them are not that expensive ~300$. Instead of liquid oxygen you could try nitrous oxide like they use in hybrid rocket engine.
You will get massively increased isp with o2/butane, but that has other risks such as engine rich exhaust when your fuel/o2 ratio is lean.
Jesus christ. I hope I can be as smart as this kid when I grow up. I'm 45.
Nice work, could you pls tell me the cost of all of this and how you crafted the brass combustion chamber
This project cost about $300 and used a number of recycled parts. It would probably cost about $500 if everything was brand new and most of that would be in the brass pipe fittings. The brass nozzle was made using a 1" bar machined down on a lathe. It was then attached to a stainless steel chamber from a previous project
@@AydenWardellAerospace thanks alot, best of luck in your CFD in your Rotating Detonation Engine!
@@AydenWardellAerospace what machinery is required to make this? I've been planning on building an engine for half a year and have been working out pricing for materials and machine cost and I would like a realistic opinion on someone actually doing it
I mostly used basic hardware store tools to make this, however I did need a 3D printer for the adapters and to build my own lathe to make the final nozzle. You could also build one for cheap, but I know you can also get a much better mini lathe online or from harbor freight for a bit more money.
@@AydenWardellAerospace sounds good I wanted to work with aluminum so my original thought was to get a Tig welder an CNC and a lathe but if I can make something like that without most of that it would be awesome, I was looking at the machines alone and it would be 6 gs alone just for cheap stuff which is absolutely insane
Very impressive! Using only compressed air? If you switch to pure oxygen you will go far.
Integza watching this: 😥
*Shock Diamonds are how the F-14 TOM-CAT got it's name. From the rings in it's 'tail' (Exhaust Gas Diamonds) Wernher Von Braun helped design the final GE F110-400 engine that could do 1890 MPH (Unclassified speed - declassified 2024) It had 32,600 lbs. trust. That's 139 kNs of force at Mach 2.74*
13:14 btw the image of the explosion on the test stand is from NASASpaceFlight's SpaceX McGregor test site 24/7 live cameras
I'm really no expert
But I'd say the next step would be a better turbo pump to get your propellant pressure higher.
You talked about 100 psi peak, 90 psi with the 10% loss, right?
I'd try to get to 200 psi somehow and compare the results. The Engine should get more efficient by this, I'd be really interested in the ISP improvements you'd gain by this.
And yeah oxygen is dangerous. Way scarier than Propane or any other combustable gas.
Very cool :)
Nice work on this one! Have you considered using NOx a an oxidiser rather than O2? It liquifies at a much lower pressure and means that you can use latent heat for pressure in the same way you can for propane... If you want to continue using propane and start with NOx you can just inject liquid for both ;)
9:49 seems you got the camera too close to the rocket exhaust.
Did NASA ever have that problem too, I wonder???
go you a construction equipment rental company and rent a site compressor it will do 20-60cfm at 40+psi
We are living in fantastic times when we can do this stuff to satisify our tinkering natures. Great work.
did you just achive more in one video than integza in all his carreer? 💀💀💀
They are called MACH diamonds
Have you heard of a synonym?
I’m surprised you have so few subscribers.
Dude why are you not doing Rotating detonation engine?
I would love to help this project/channel out with some free CNC machined parts!
Thank you for the offer!
I am looking to machine an aerospike nozzle sometime soon, so e-mail me at awaspace@gmail.com if you would be interested in helping out.
Diamonds are girl's best friends...and jet engineers.
Wow
This is really impressive! Schlieren footage is incredible
dude this is a great video, its criminal that it only has 12k veiws
waw good job bro
i like to see your great job
Well done 👍🏴
Plastic Turbopump 👍1:10
Here before this blows up lmao
Backyard Mach diamonds 😎
If you could swap out any components with titanium, what would you swap out?
If it was possible to manufacture, I would have the chamber nozzle together as a single piece of titanium to withstand prolonged operation and not have any gasket failures.
nice big plasma torch
I should totally do this
Rocketry is hard.
this video has 1000 likes
The forbidden lighter
The thrust is reminiscent to the full power thrust of a Ramjet from the SR-71 Blackbird and YF-12. GREAT JOB 👍
I appreciate the volume warnings, but what was preventing you from just lowering the volume on post during those segments instead? Otherwise very cool video!
Very cool
nice! before jumping all the way to pure oxygen, you might try nitros oxide, which has a higher oxygen concentration than air, but is much safer to handle than pure oxygen.
hey we have the same name
If you don't blow yourself up with one of your experiments, you will probably achieve great things and work on very interesting projects. Impressive work!
Shock diamonds in rocket exhaust is supersonic, railguns are hypersonic, seems like there is lots of room for improvement of rocket engines using some type of MHD acceleration.
You are a genius! Holy moly!!!
I salute you young man. That is a mighty fine rocket. Thank you very much for allowing us to to see you do this
.. amazing that you can build hypersonic rocket. In your basement with stuff.. 1 to 10 I give it a 9.5 keep tweaking on it.❤ Congratulations this is my most favorite rocket on TH-cam at this time..
Nice.
Have you tried to make a ro cket engine that uses a solid rocket fuel there are ways to make surprisingly cheap solid rocket fuel that can get a decent amount of power ( for what it is ) even without a nozzle
I feel like the combustion chamber size could play a role and why the smaller tube worked better than a larger one. I believe the gas would lose speed and burn out completely before it reaches the nozzle. But idk.
eventually, add inside the chamber, just before the nozzle, a "wall" of tubes to reduce turbulences at the entry of the nozzle !
When launch?
What a great piece of work, both mechanically and design calculation. Looks like you will go far 😊
good vid
Гойда, брат!
nice
Congratulations to the proper mach diamond formation ! Very cool 😎
Seriously impressive stuff dude, keep up the good work!!
Forming the nozzle with the tubes is genius! I’ll have to do that when building mine
Shock diamonds are a sign of inefficiency.
How so? Not at all trying to hate, I have no qualifications at all, but aren't they just a sign of supersonic airflow?
@@opalmams9775 Shock diamonds form when the supersonic exhaust from a nozzle is slightly over-expanded, which are a sign of the exhaust being too pressurized.
But they're sick as fuck
@@janeczekdeliverservices7831 I agree with that
Sure, but they form if there is the slightest imbalance (you get them with aerospikes even, and they’re practically ideal case), so you’re not going to get rid of them
ive never seen such perfect mach diamonds at this scale
Super cool vid and Dam that logo is awesome
Deserves more views and subs, very well made video and jet
damn dude, living my dream
insane Mach diamonds! great job
Another extremely impressive video! Keep it up!
Integza would be proud!
WOW.. hats off to you sir…. Amazing video! Love the project, amount of hard work and research and explaining!! please keep up the amazing hard work. Can’t wait to see what’s next.
Those are some sweet Mach diamonds
i know what im doing tomorrow
That's rad.
Incredibly underrated
Impressive keep at it .
3:12 very nice imaging
Rad dude, just rad.
Thats awesome
Great video. Subbed...👍
Awesome, thank you!
Yea they're called "Mach Diamonds"
Dude this is awesome!
Very cool but for future videos keep the explanations to a minimum. No one really cares too much about the exact dynamics. There is many many videos for that already. Take integza for example. Keeps it super simple and gets big views. Most people just want to see fast shooty flames and loud noise
"I made a thermonuclear bomb in my garage, I am about to start the end of the world 😁"
Good job! Maybe try making an RDE engine (Rotating Detonation Engine) (most powerful engine ever discovered (accidentally discovered making the Saturn V))
I would personally attempt a pulse detonation engine first, like on the (modified) rutan long-EZ
@Integza