HOT FIRE TEST - Building a Liquid Rocket Engine 2.0. I test fired my bipropellant rocket engine!
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- Опубликовано: 5 апр 2023
- My name's Callum and I've test fired my homebuilt rocket engine!
This is the second video where I've been working on my rocket engine and the first where I finally get to test it out with a hot fire.
I've been working on the engine over the last few months, mainly looking at the valves and ignition system for reliable firing but a few weeks ago I finally got the chance to let it burn and IT WORKED!!!!
This is only my second proper RUclips video so I know there's a lot of improvements to be made, but thank you all for being so supportive as I balance my studies with this exciting project.
This is only the start of what I hope to be an ever improving series on rocket engines. I have so many ideas and all your support has boosted my drive for what this could become.
I hope you enjoy the Video, if you have any suggestions or want to get in touch please leave comments or send me through something on my socials that are linked on my RUclips home page.
Lots more to come - Thanks for watching :) 
Развлечения
![Natanael Cano x Oscar Maydon - Giza [Official Video]](http://i.ytimg.com/vi/eXCS6-MSQ_Y/mqdefault.jpg)
Seems like your fuel lines became fuel for the rocket themselves for a moment. Great work, you've done something that few people would dare try!
Here's an idea for a ignitor: Instead of having this screw thing on the side of the chamber, which has unwanted flow redirections (you can see in the fire test how it flows to the left side). Instead it like the soviets do with the Soyuz rocket: They took giant metal poles with the igniting agent and put it up into the combustion chamber, which ignited the engine and immediatly disintegrated. An oversized matchhead, basically. In your case, you can just 3D print some puny structure with a fancy matchhead that ignites the engine.
The injector plate doesn't look very balanced. You should have the big spray nozzle in the middle and the two LOX (liquid oxy) holes the left and right. Like that you'll have a more balanced combustion. Right now one half of the chamber might have unreacted fuel and the other side unreacted LOX. Problem is, the LOX might not react but it'll get hot from the combustion and real hot, pure oxygen doesn't go well with ... anything, really.
Currently the system runs on tank pressure which could get dangerous as the combustion might might get more powerful then the tank pressure so it will back flow. As a safety precussion you could add a monster relieve valve (or just a weak point at any point in the system) right at the tank so if disaster strikes, the back pressure will go into a dangerous, unlethal direction
Maybe do a regenerative cooling loop? Something real simple, just two bigger halfs of the chamber and nozzle screwed together to incase the actual chamber and nozzle. Also don't use the fuel or the oxidizer (not yet atleast) but rather use a really cold gas like liquid nitrogen to test it. If you continue further, cooling might get a real consideration. Also if you want to go overkill find a company to machine you a chamber and nozzle out of an "Inconel" (alloy)
YESSIR WE SPARKING UP TODAY
YESSSS INNDEEEEDDD !!!!
yo this is amazing keep at it and maybe get some check valves at the injector so you don't detonate your new fuel lines.
I love how your motivation for starting this project (mentioned in your first video) was getting rejected by aerospace companies. I just wanted to say I'm an intern with SpaceX and you definitely are more qualified with all this hands-on experience than I am. Also remember that building your own projects is usually more fun than taking orders from your boss :)
Wow mate congrats on that, and I think I agree with you on the last bit ;)
@@Callum-Long Pressure over area increase nozzle outlet a little and use swirl injection to cool chamber and a pintle or other flame holder to keep flame stable.
Would work to a degree but you would be better to go pulse detonation at that point and detonation is a real bitch when flowing through a constricting nozzle
@@Callum-Long 🔴 What Is Islam?
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🔵 It is the same message preached by Moses, Jesus and Abraham.
🔴 Islam literally means ‘submission to God’ and it teaches us to have a direct relationship with God.
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🔴 Becoming a Muslim is not turning your back to Jesus.
🔵 Rather it’s going back to the original teachings of Jesus and obeying him.
More ...
Check valves won't work. Increase Oxygen pressure or decrease chamber pressure. (And that also applies to the fuel side of things)
@12:05 That dude with the champagne is the OG for bringing that to the static fire test!
You actually made 2 rocket engines, the intended one, and the hybrid that used hydraulic hose for fuel! You might want to use hard-lines for the o2 in future!
Cool as hell though dude!
Looks like a Gas Generator for a Turbopump. So fuel rich. Super cool!
Maybe it will be one day 🤫
That was oxygen-pipe rich. Not good. I don't know why he's cheering soo much. The test seems a failure to me... Didn't even make measurements. Not like he could use that data to update predictions, cause he didn't make any calculations to begin with. *Angry know-it-all noises*
@@potatosalad68 no one asked, hater
@@potatosalad68 Being the devil's advocate here, but you don't need measurements to analyse what went wrong with that test and how to fix it
Having pressurised tanks so close is insane.
Wow! I love everything about this video. The concepts, the video editing, the enthusiasm and the very supportive family. Keep going!
Thanks for that mate means a lot
That was AMAZING! You can practically follow the oxygen getting pushed back as the exhaust becomes black due to incomplete combustion before blasting the connectors!
Fantastic job man! Really looking forward to your next video!
You are just like me 50yrs ago. Wanted to know how things worked and I knew I could also make them. PLEASE safety glasses and other safety equipment. Worked for GE then a large gas utility in MASS. Anything under pressure can takeoff. You could lose an eye or worse hurt someone else. Working with my hands gave me a great lifestyle and I believed I could make anything. This is why I watch these videos. Stay safe and never forget to be safe.
Amazing mate! 😮
Looks like you might need to increase the propellant pressure. Combustion chamber has greater pressure than the propellant injectors can deliver, pressure always flows from high to low.
I look forward to see what you do next. 👌
And not use rubber tubes for pure fucking oxygen piping.
No calculations about flow rate, chamber pressure, etc., the ignition system is based on plastic insulated wires, which I don't know how he expected to survive in the combustion chamber...
It's just soo reckless.
And I don't say making mistakes is bad, but I'm a nobody, with no degree, just a rocket enthusiast, and I was holding my head through the whole thing. No safety, No performance predictions, just being naively ecstatic while almost blowing themselves up. It's the stupid mistakes that are annoying. Acting first, thinking later...at best. If only you'd have acknowledged your mistakes, instead of ignoring the. But maybe in the next video. Anyways, good luck. Sorry for the ranting.
@@potatosalad68 yeah, the safety is.... Questionable, and I agree about doing a few calculations.
I would recommend looking into adding a pressure gauge to the combustion chamber, this can probably be achieved by attaching it to a length of steel pipe coming off the side and ensuring the pressure in the combustion chamber is not greater than the pressure of propellant injectors.
And definitely add some kind of flashback arrestor.
The ignition should be fine, as long as you can get sustained combustion.
Please stand waaaay further back.
Respect for doing it, mate.
@@WayneMetcalf Yeah, about the ignition system, I mean he said he wanted to make it reusable, to be able to re-ignite it multiple times, which I agree would be cooler and more practical, but not as simple as I first thought. I have a couple of ideas, but I wander how SpaceX does it.
@@potatosalad68 Here is an explanation of how rocket engines are ignated. ruclips.net/video/capiUBVd7EU/видео.html
If you are more interested in the details a good book that I recomment is Rocket Propulsion Elements by George Sutton.
@@potatosalad68 I think I read that SpaceX uses glow plugs, like the ones used in diesel engines.
Take a look for Integza on RUclips, he has made all sorts of rocket engines.
Excellent work mate! The oxygen line bursting had me worried for a second. Looking forward to further updates...
Me too I won’t lie :)
20:11 Great seeing all the team together! Fantastic work. Everybody!
this is the most wholesome engineering channel
I decided I was going to build an engine. Good to see others working on it
This channel is the new hotness. Literally.
That's so awesome! This got me realy hyped :D Technically you didn't only succed in building a liquid rocket engine! Those oxygen hoses acted like hybrid rocked engines in the end. ;) Can't wait for more :)
I'm hooked. Looking forward to the next video.
It's great to see someone else trying to make their own liquid rocket engines in the UK! I'm now a first year engineering student, and managed to make one, but have been trying (and failing) to scale it up a little for years. I'll try and get a video of the first (and only) successful test fire on youtube at some point. If you happen to need anything CNC lathed, send me a message :)
That was awesome !
love this Callum, this is inspiring!
What an amazing feat so far my friend!! Cheers!
Excellent work man! I appreciate your enthusiasm and that you keep pushing to get better, while allowing us to follow along. Your family is so supportive and it shows in these videos. Keep at it, and good luck!
Absoloute banger video. Keep up the grat work!
This is seriously cool! Can't wait for the next video.
You really, really need something that functions as a check valve. You've done great work. Looking forward to seeing what happens next.
That looked good. The only thing that let go was the pipe work… wicked fun to watch 👍👍👍
Hard work pays off!!!!!! I am so proud, great job❤️❤️❤️❤️
Nice job, Callum!! .... Dude, look up "flash back arrestors" ... That's what you need on your oxygen and fuel lines, so the flame doesn't travel up the hose (again) and blow up your oxy and/or fuel tanks. They are used by oxy/fuel welders. I'd recommend at least 2 of them on each line, spaced apart. Also, the pro flashback arrestors for welding are expensive and probably wont fit your application. However, you can nake your own ... BUT make sure you test the cr*p out of them before using them attached to any sizable tank. ... Nice job!!
Actually, lookup "HHO flashback arrestor testing" ... and "DIY flashback arrestor" ... Several RUclips videos on testing are worth watching... including ones from "YeahItWorks" and "Joko Energy" ... (not exactly sure of channel names, but those should be close) .... there are many more .... I'd recommend only following the directions of the ppl that actually show their design works by showing successful tests ... And, then scaling the design to your situation, which is much higher volune flow and much higher pressure .... So, you will need to make your flashback arrestors both bigger diameter and longer (im guessing) .... The main thing, as I understand it, is the dense metal mesh in the arrestor is drawing the heat out of the flame, so it cannot propagate back upstream.... So, possibly having your arrestors situated in ice water or dry ice might help them be more effective. Ive never seen that done before, but Id guess it would help your arrestors be more effective if they are kept chilled down ... Good luck!! Be careful!!
Whole video is really interesting . I really enjoyed the last burn and the exhaust sound , congrats and keep it up .
Great job! I'm excited to see more
that was soo cool! cant wait for future updates 💯
Back in the '60s I built a very small experimental rocket engine to test hypergolic reactions. The engine was tiny, just 1/2 inch in diameter, and was low pressure gas fed. My best combination was with Acetylene and Chlorine, and mad a very nice shock diamond. Only ran it for 1 or 2 seconds, as the combustion products are quite toxic, with carbon tetra chloride being one product.
that was sick mate, congratulations
Finally the next video!!! Long awaited and well made as ever
Thanks mate, too kind !!
This was awesome made me think of things i never thought of like hose pressure scaled up
Amazing engineering mate you are awesome
You're making great progress! This was very fun to watch. Keep us posted Callum👍🏻👍🏻
Amazing work! Congratulation on a great hot fire.
Very well done! Congrats! Keep up the good work!
Forza! Avante!
VERY fun to watch, I felt your victory with you...CONGRADULATIONS 🥳🥳🥳
I'm not kidding, with only 2 videos, this has become my favorite irl youtube channel. Complete, just... EPICNESS; a lovely, genuine guy, who takes the time to explain things (really well); amazing family; fantastic, sensical editing, ROCKETS... I could go on and on. It's really got it all.
I'm moving to sixth form next year (currently making a steam engine for GCSE Design Technology) and it really inspires me. Not saying that I'll likely get anywhere close to this level of epicness with my A-level project, but it's still so incredibly useful in oh so many ways. Keep safe Callumn. o7
Amazing man! I found a gem on RUclips!! I will wait for the next video! So super cool
Well done Callum, great effort 👍
Have you considered for future iterations using a oil burner electrode as it’s designed for the high temps and could be reusable.
Yep, as Henry (below) said, a check or anti-blowback valve would be a good idea. They use them on oxy-acetylene hoses.
good old engine rich combustion.
congratulations 🙂
subscribed
nice work!
Outstanding! Well done Callum 😃
Thanks mate 👍🏻
Amazing!!!!! I think it’s a big success!
Waiting for fixing the issues and next ignition 💪💪
Well done, Callum. You've earned another subscriber. Wishing you every success in the future.
Amazing project and good vid!
ayyyy.. keep it up !!,
love ur hammer in prev video
Your family is truly amazing!!!
Spectacular. There is something so comical about the scene where the rocket fires, stops, then belches a cone of black smoke
Comical looking back but was intense on the day I’m telling you ;)
That black smoke was the fuel lines.
Cool video!
Ever since watched the first video, been waiting for this one. Really great one!!!
Hope it was worth it :)
Very nice video. Good work 👍
Underated channel. keep going your incredible
Thats awesome dude, looking forward to seeing some mach diamonds next time 😁
Well Done mate. Great achievement!
such a good video
The video is really helpful for me , since I intend to build one but in really small size
That was super cool man.💪🏻💪🏻💪🏻 from 🇰🇪
I think you need an additional anti-backblast valve in your in-lines. These prevent fire/explosions to get into your hoses as it seems it did.
Not to take away from your build but just a little input. You should use plumbing and valves for a nitrous setup. Get rid of the pure oxygen, us3 NO2. Get rid of all that Aeroquip hose. It’ll kill someone. Need a proper test enclosure. Don’t try to reinvent the wheel. Repurpose what’s already available. You should look at the H2 O2 rocket motors from Apollo program, Saturn V and believe it or not , the Hydrogen peroxide propellant system of torpedoes. Stay safe, look forward to the next one. A good resource I found is the Tech Ingredients channel. The guy is brilliant and has a lot of ideas that you can adapt to your build. Keep Calm and Carry on!
Fully underrated RUclipsr...
U NEED more subs
This engine is beautiful man
Glad I found this guy. You sir have a new subscriber.
Now this is what you tube should be!
epic m8! i was watching everyday astronaut channel and was thinking to build something like this and here you are 4 days later :D i'll follow your adventure and learn from your mistakes
You're doing great man! Keep it up! Constructive criticism: Keep your audio consistent, it's the most important thing for a RUclips video (besides your good content!)
Will keep an eye on it mate
@@Callum-Long premier pro can set each clips audio level automatically to the correct level and make the background music the correct level too. does help for people listening with headphones. great video
So, quick suggestion for the ignition system. There has been a pretty big influx of chinese made gasoline 4-stroke scale model engines into the market over the last couple of years (see JohnnyQ90 on YT). With these engines comes really small proper spark plugs, and ignition systems for those spark plugs. They could be screwed directly into the combustion chamber (however many necessary, there are ignition systems for anything from 1 to 12 cylinder model engines). This would keep you from having to fiddle with wires in the combustion chamber, it could promote better flame propagation, and ultimately I'd think a better result potentially. On another note, regarding fuel, why gasoline specifically? And why a manual fuel valve?
I appreciate you doing the projects that have flown through my ADHD fueled brain but I'm far too lazy to undertake. And thank the algorithm for showing me your channel. Gotta sub for more!
I’ll have a look at that see what I can find that might work, thanks for the sub!!
this is amazing!
Glad you like it mate
I'll be that guy again. Build the pumps, test them on water (get yourself the pressure sensors along the lines), make the fuel atomizers and test them on water with new pumps, calibrate the mass flow of both propellants. That's how you succeed and be the first hobbyist on youtube who actually build the damn thing. Good luck, for real.
Incredible man! Can't wait for the day I can just built this stuff in my garage.
I hope you can one day mate, nothing more satisfying than building something yourself
I REALLY hope you become a giant youtuber, the things you build now are SO COOL. I just can't wait!
That’s would be great 🤞🏻
congrats for you first ignition, keep it up! will follow for sure!
That’s what I like to hear, so much more incoming my friend
Great job mate.
Thanks man !
Well Done Callum all the best for the future KEEP SAFE
Thank you, will do
amazing
Porfinn que emoción estos vídeos
wow dude this is so inspiring!! keep going!
Thanks man !!
Well done. Need some "Blow Back" arrestors, but this is great progress, Brother.
early! so glad and proud to follow this channel from the start ☺
I appreciate you doing so mate !!
@@Callum-Long thank you!
Nice!
that was amazing
Thanks mate :)
Well done Callum, another great video. Think you will need to step up the safety side for the next iterations, but it is going to be a great journey watching you develop the engine. Keep up the good work. Ad Astra! :)
Amazing job. You may want to lower the pressure in the combustion chamber or increase the pressure of the propellants because the burnt mixture is likely back-feeding into your lines.
Yeah I think your right, hopefully with some check valves we can start running some test and see where the sweet spot is!
@@Callum-Long Firstly, nice job on getting your hands dirty having a shot at it. Secondly, as others have suggested, don't just wing it with safety, you or someone else could be seriously hurt, definitely look into check valves.
Also have you considered somehow making a pre-mix chamber with a small spray nozzle into the main chamber? that way it would be a lot harder for the flame front to travel up into the internals like it did in this one.
Bro next upgrade to metal pipes and eliminate the ignition setup. it's cause to change the direction of exhaust gas and force.👍👍👍🎉.
Fix it and fire it 🎉🎉🎉.
We are waiting 🤩🤩
Woooo! Congrats! Can't wait to see the next. And yea, agree with you and others.... need to fix some issues and definitely need some improved safety. I've witnessed those tanks explode in person... you aren't back far enough.. seriously, take cover. Keep your o2 over pressurized of fuel. Ideally you need an inner tube or section to separate the chambers to keep o2 positive pressure and fuel negative.
Go on Callum!!!!
I want to give some advice -
1. The pressure of the fuel and oxygen injector should be grater than the combination pressure of the combination chamber.
2. Slowly rising the pressure in the combination chamber will increase the chances of proper ignition.
3. Some type of cooling system is needed for the walls of the combination chamber.
YES i've been waiting for this video
Hope you enjoyed :)
It is favorable to have a higher pressure on the oxygen line. You also need a better fuel head, a better igniter and, most importantly, regenerative cooling system for the nozzle. But I am quite sure you know all this yourself. So I just wish you all the best with the project, whichever direction you decide it to take. :)
Hey Callum, I'm a launch engineer working for Rocket Lab. One thing that might help you is to try and steer away from using rubber lines and run stainless steel high pressure tubes (can be 1/8" lines, quite affordable) since I saw that the back pressure split your lines. I can't see exactly where your igniting from but the way your machining the throat of the engine might make for an obvious failure point. Try your best at smoothing out the inside wall as the gases travel out fast. All in all, great starting point. Keep it up
Ok mate thanks for the advice, am already looking at some stainless pipes to use instead, should be a bit safer. Any jobs going over at rocket lab ;)
@@Callum-Long Always jobs and always looking for talent. Once you have it working we'll take a look at your CV ;)
Hey luke , can you throw some light on y in the first place the flame was able to travel back , I mean in all pressure fed engines we do not have check valve before the injector ......I m just asking y did it happen and what can be done to prevent the same .
@@thecros1076 A few things to note in his test fire is that black smoke bellowed from the nozzle then the oxy hoses failed. Black smoke is an indication of fuel/air mixture problems but albeit his test was to see how it goes. If a high pressure line (SS swagelock or something similiar) were in there then you could solve the hose problem with a check valve since it only delivers oxygen. If I were to take another shot at this, I would tap and thread a spark plug (yes, we use spark plugs on the Electron) for ignition and play with the fuel/air mixture in each test. I think you might run into problems with your throat though. You are on the right track though! Better injectors (really fine spray of fuel if you can), probably a safer stand so its rigid and SS lines and you might have a workable engine.
you could use ethanol as a fuel that evaporates quicker and therefore mixes better, also ethanol mixes with water so you can tune your ratios so your engine doesnt melt
Or you could just increase the fuel to oxidizer ratio to run the engine cooler
I love this! When part 3?
Your family is amazing friend. You have people on every side of you supporting you. You have a girlfriend who doesn't think you're nuts. Congrats in getting everything together this far. You've got a future. The world needs more people like you.