Hearing "Fire!" before combustion began cracked me up! I'm too used to SpaceX's launch sequence 😂 Congratulations on the test, I hope you gathered the data you were looking for
A perfect way to build enthusiasm for understanding rocket science. Imagine their pride when they first create Mach Diamonds. Great show. Wonderful sound. Space soon!
@@arturjogi2667if you are making a real rocket you want them. You want your first stage to be optimized in between sea level and vaccum to have reasonable efficiency throughout its burn, for example the Merlin engine has an exit pressure of about 0.7bar
@@arturjogi2667 well yes its true mach diamonds indicate low efficiency, but having supersonic exhaust speed is a big milestone for any project. Although I work with solid rockets im not an expert on the matter.
Well it happened. A forty second video where I actually wish there was a 5 minute intro explaining the project, the history of the people involved, and how skillshare can change my life. At least you showed the best part of this project: A giant flaming jet.
what i find really interesting is looking at the vapor/smoke in the lower left of the engine. when the engine fires, the exhaust flow seems to suck the smoke , even though it is not in the way of the flow
@@antonhojman18 this. The exhaust is a sizable amount of mass moving very quickly in to one direction, which pulls surrounding air with it, which creates a low pressure zone. That's btw. how they test rocket engines in a vacuum on earth, the engine's exhaust creates the vacuum for the chamber ;)
What is your nozzle made out of? What tipe of cooling system are you using, ablative layer of materials? I assume your engine is running at very high temperatures. I'm the propulsion leader of a undergraduate team that build rockets for events like Latin American Space Challenge and Spaceport America Cup. I'm interested to know more about your engine project if it's not a problem for you. By the way, congrats for the static test!
@@trendingreelsforyou9489 thank you for the compliment I guess... But honestly I'm just an ordinary student with one or two braincells dedicated to the rocketry area haha
@@Matshusco haha fine but still not everyone can 😂 able to work on this aerospace fields ( some may says anything can be possible by anyone but in reality isn't ( it's depends on various factors ikyk reality) ) just saw your comment randomly so wanted to interact so did the message , are you in telegram , reddit or some other social media I'm interested to keep in touch with you 😊 I want to self learn about rocket engine and rockets from scratch elementary level to upto how much I can
Do you have an estimate of how much it would cost to build this for recreational purposes? My initial estimate is $5,000, but I'm concerned that the expenses might increase significantly.
did you guys use graphite to maintain the temperatures inside the nozzle walls? It seems like it because there is a black exhaust at the very beginning of nozzle flame.
It sounded like the turbopump made some noise and then the flow was greatly reduced? Brilliant work, amateur rocketry is going to put a postdoc in orbit one of these days.
Agreed!! In the mean time, we have this: ruclips.net/video/aHgL5cvsIDA/видео.htmlsi=o8zP8ya5ZWeUxo3q. It's only x8 slowmotion but we still think its pretty cool! Check out 0:07 hehe
Welp, that skeleton didn't stand a chance! Y'all have any tips on getting into this student/hobbyist part of the industry? I've been looking to be a part of it for awhile.
Amazing, do you have open source schematics and a load capacity, range and ballistics computer? Looking to put 15 of them in a rack on my Toyota pickup truck for rapid weather observation.
Seriously impressive for a student project, little bit of combustion instability toward the end of the run but other than that looked like a very good test. Would be nice to see a presentation on the design and implementation. Looks to be burning very fuel rich, no doubt to keep camber temps down.
Hey, I was looking through the comments to see if someone could explain what that event was at the end.. Was that combustion instability? It made me raise my eyebrows because I havent seen that in the rocket videos I've watched.
@@notrelevant5834 Combustion instability is the dark areas in the exhaust as the engine runs, the fire ball at the end is caused by cutting oxygen just before fuel, this causes unburnt fuel to exit the engine and burn slowly creating a large fire ball. This is done to make sure a detonation does not occur as the engine shuts down.
Hey @@schrodingerscat1863, that's a great hypothesis, but not exactly what is happening here! So combustion instability is more closely defined by oscillating pressure fluctuations within the engine itself. What happened wasn't actually an intentional lox cutoff before fuel, but rather the pressurized nitrogen in the oxygen tanks being prematurely ingested in the engine. Our lox tanks are pressurized with nitrogen to force the propellant into the engine, and at the rather high gaseous flowrates, some of the nitrogen will diffuse into the liquid oxygen. This gets more fun when the nitrogen condenses into LN2 due to the cryogenic temperatures, and mixes with the LOX at the top of the tank. That made our last few seconds a bit messy. If you would like to see a more detailed slow motion of this happening, I invite you guys to check out this other video of the same test! We actually ran this twice back to back, and the same phenomenon occurred at the same moment, roughly 8s into the burn: ruclips.net/video/aHgL5cvsIDA/видео.htmlsi=6frKNz5yGlPBoVmv LN2 ingestion begins to occur at about 1:30s into the video. It's actually pretty cool to see the engine recover and restabilize even with inert freezing nitrogen being injected directly into the engine. Ideally, we would have larger tanks to have the full runtime with pure clean, but cost is always a controlling factor! That's actually what we're working on right now! We're glad you like the video! We've worked very hard to get here, and have learned a lot on the way!
@@SpaceConcordia agreed , but may be use helium to get rif of this issue. Cost would be very very high with compared to nitrogen gas but then u role of the possibility of mixing nitrogen gas into your oxidizer . Congratulations on the fire , the tanks would have to to be a way way High pressure for you guys to get this 40KN thrust . May be implementing a pump fed system would solve all the issues , ofcourse it takes a lot of time but thinking of going to orbit with this engine you would need a pump for sure . Always available for a fun rocket propulsion talk .
It does looks impressive and quite powerful, but it somewhat looks a bit like flamethrower which means it looses lot of thrust on just throwing fuel. But im not rocket scientist, im just throwing uneducated guesses here. 😀
That's a good observation! While we do burn quite fuel rich compared to most commercial rocket engines, I think the majority of what's contributing to the "flamethrower effect" might be the overexposure of this particular camera. We have another recording taken by a Fujifilm at 8x slowmotion that's significantly less exposed than this one that I think you might enjoy: ruclips.net/video/aHgL5cvsIDA/видео.htmlsi=o8zP8ya5ZWeUxo3q There's some pretty interesting phenomenon that occur right at the 8th second of the 2nd hotfire!
@@SpaceConcordia Does it burn rich? They burned some extra fuel in Saturn 1 engines to prevent it from melting, at least that is my impression of it. F1 engines do look a bit like flamethrowers.
@@tomminystrom Most cycles burn rich. Notable exceptions being some older Russian and engines and new LOX/methane engines like BE-4 that borrowed a lot of inspiration from them.
And here's a textbook example of someone putting down other people's accomplishments to make themselves feel better. It's a liquid btw. Even if it was a solid, no need to shit on their hard work.
Looks great team and extra thanks to Mr. Skeleton whose atomization has really put a smile on my face today.
It’d be more vaporization that atomization.
@@mondobigbongo Want true freedom? Come to Jesus Christ 👍😊
@_Siloam_This ain’t the time or place for religion mate.
I always wondered what made the Earth spin
Hearing "Fire!" before combustion began cracked me up! I'm too used to SpaceX's launch sequence 😂
Congratulations on the test, I hope you gathered the data you were looking for
Not disappointed in the RUclips algorithm today, this was awesome!
lmao not the skeleton who got absolutely obliterated
A perfect way to build enthusiasm for understanding rocket science. Imagine their pride when they first create Mach Diamonds. Great show. Wonderful sound. Space soon!
But you're not supposed to create mach diamonds...
@@arturjogi2667if you are making a real rocket you want them. You want your first stage to be optimized in between sea level and vaccum to have reasonable efficiency throughout its burn, for example the Merlin engine has an exit pressure of about 0.7bar
@@arturjogi2667 well yes its true mach diamonds indicate low efficiency, but having supersonic exhaust speed is a big milestone for any project. Although I work with solid rockets im not an expert on the matter.
Awestruck.. our future is going to be crrrrraaaazy!
Well it happened. A forty second video where I actually wish there was a 5 minute intro explaining the project, the history of the people involved, and how skillshare can change my life.
At least you showed the best part of this project: A giant flaming jet.
Skillshare 🤣🤣
@@Sales-ki7lx Want true freedom? Come to Jesus Christ 👍😊
what i find really interesting is looking at the vapor/smoke in the lower left of the engine. when the engine fires, the exhaust flow seems to suck the smoke , even though it is not in the way of the flow
It's because of underpressurized air
@@antonhojman18 this.
The exhaust is a sizable amount of mass moving very quickly in to one direction, which pulls surrounding air with it, which creates a low pressure zone.
That's btw. how they test rocket engines in a vacuum on earth, the engine's exhaust creates the vacuum for the chamber ;)
Any data on the thrust produced? Quite impressive!
40kN
= 4 ton, or 8800 lbs
Any ant nest on the ground probably:
"I guess we'll just stop existing now"
What is your nozzle made out of? What tipe of cooling system are you using, ablative layer of materials? I assume your engine is running at very high temperatures. I'm the propulsion leader of a undergraduate team that build rockets for events like Latin American Space Challenge and Spaceport America Cup. I'm interested to know more about your engine project if it's not a problem for you.
By the way, congrats for the static test!
😅🙏 hi professor
@@trendingreelsforyou9489 thank you for the compliment I guess... But honestly I'm just an ordinary student with one or two braincells dedicated to the rocketry area haha
@@Matshusco haha fine but still not everyone can 😂 able to work on this aerospace fields ( some may says anything can be possible by anyone but in reality isn't ( it's depends on various factors ikyk reality) ) just saw your comment randomly so wanted to interact so did the message , are you in telegram , reddit or some other social media I'm interested to keep in touch with you 😊 I want to self learn about rocket engine and rockets from scratch elementary level to upto how much I can
Can you show the skeleton after it got blasted away? (If you ever found it again.)
Do y’all use kerolox
Do you have an estimate of how much it would cost to build this for recreational purposes? My initial estimate is $5,000, but I'm concerned that the expenses might increase significantly.
did you guys use graphite to maintain the temperatures inside the nozzle walls? It seems like it because there is a black exhaust at the very beginning of nozzle flame.
How many km would that rocket fly?
You get like 1 frame of Mr. Skeleton being vaporized
It looks great
Damn!! That looks like a Space-Shot Engine ✨ (karman line is calling) 🔥
I think I found the real world equivalent of the RockoMax 24-77 engine from Kerbal Space Program - same thrust, probably the same size. Nicely done!
Is this a pressure fed kerlox engine?
"Yes I do want my body to be used for science"
The science:
It sounded like the turbopump made some noise and then the flow was greatly reduced? Brilliant work, amateur rocketry is going to put a postdoc in orbit one of these days.
Please invite TheSlowMoGuys and let them record the next test!
Agreed!! In the mean time, we have this: ruclips.net/video/aHgL5cvsIDA/видео.htmlsi=o8zP8ya5ZWeUxo3q.
It's only x8 slowmotion but we still think its pretty cool! Check out 0:07 hehe
Welp, that skeleton didn't stand a chance!
Y'all have any tips on getting into this student/hobbyist part of the industry? I've been looking to be a part of it for awhile.
What the spider sees when I take out the blowtorch:
how much horsepower is that?
Those damned orange cones are everywhere.
хочу себе такой огнемет. Где взять?
How did you're university approve you using Kerosine, also are you open source ?
Whoever shouted FIRE understood the assignment
When you want to prank your friend by setting his lighter up to maximum flame
That's so sick!
how do u make a rocket engine
What fuel & fuel cycle are you using? That thing looks badass!
We use kerosene-liquid oxygen, pressure-fed cycle!
@@AK_381 Helium pressurization or autogenous? How (if at all) are you cooling the thrust chamber and nozzle?
@@tomasbeblar5639 LN2
@@tomasbeblar5639 Nitrogen surprisingly
love that "FIRE"
You hope it is secured well enough to stay mounted. That is an emergency if it shears free, holy shit, what force!
Can I get a light?
Amazing, sounds and looks awesome. Invite Gavin from slow mo guys next start up. Would look amazing on that camera. Especially that start up.
That's the dream! In the mean time check out our 240 FPS slo-mo of this hotfire ;)
Thousandth subscriber!
Loved how the skeleton got obliterated by the launch LOL
Amazing, do you have open source schematics and a load capacity, range and ballistics computer? Looking to put 15 of them in a rack on my Toyota pickup truck for rapid weather observation.
Has the after sound of a pulse jet.
That boulder disappeared too!
Seriously impressive for a student project, little bit of combustion instability toward the end of the run but other than that looked like a very good test. Would be nice to see a presentation on the design and implementation. Looks to be burning very fuel rich, no doubt to keep camber temps down.
Hey, I was looking through the comments to see if someone could explain what that event was at the end.. Was that combustion instability? It made me raise my eyebrows because I havent seen that in the rocket videos I've watched.
@@notrelevant5834 Combustion instability is the dark areas in the exhaust as the engine runs, the fire ball at the end is caused by cutting oxygen just before fuel, this causes unburnt fuel to exit the engine and burn slowly creating a large fire ball. This is done to make sure a detonation does not occur as the engine shuts down.
Hey @@schrodingerscat1863, that's a great hypothesis, but not exactly what is happening here!
So combustion instability is more closely defined by oscillating pressure fluctuations within the engine itself.
What happened wasn't actually an intentional lox cutoff before fuel, but rather the pressurized nitrogen in the oxygen tanks being prematurely ingested in the engine. Our lox tanks are pressurized with nitrogen to force the propellant into the engine, and at the rather high gaseous flowrates, some of the nitrogen will diffuse into the liquid oxygen. This gets more fun when the nitrogen condenses into LN2 due to the cryogenic temperatures, and mixes with the LOX at the top of the tank. That made our last few seconds a bit messy.
If you would like to see a more detailed slow motion of this happening, I invite you guys to check out this other video of the same test! We actually ran this twice back to back, and the same phenomenon occurred at the same moment, roughly 8s into the burn:
ruclips.net/video/aHgL5cvsIDA/видео.htmlsi=6frKNz5yGlPBoVmv
LN2 ingestion begins to occur at about 1:30s into the video. It's actually pretty cool to see the engine recover and restabilize even with inert freezing nitrogen being injected directly into the engine.
Ideally, we would have larger tanks to have the full runtime with pure clean, but cost is always a controlling factor! That's actually what we're working on right now!
We're glad you like the video! We've worked very hard to get here, and have learned a lot on the way!
@@SpaceConcordia Ok that make sense, pressurised feed from the tanks removes the need for pumps greatly simplifying the engine design.
@@SpaceConcordia agreed , but may be use helium to get rif of this issue. Cost would be very very high with compared to nitrogen gas but then u role of the possibility of mixing nitrogen gas into your oxidizer . Congratulations on the fire , the tanks would have to to be a way way High pressure for you guys to get this 40KN thrust . May be implementing a pump fed system would solve all the issues , ofcourse it takes a lot of time but thinking of going to orbit with this engine you would need a pump for sure . Always available for a fun rocket propulsion talk .
Is this liquid. Fuel engine
No
Nvm it actually is check description
I need to get this for my ground squirrel infestation
Biblically accurate shrimp booster
Oh can you see, by the dawns early light...
When you find the ground nest of hornets...
the forbidden leafblower
Didn’t think the skeleton would have the guts
Skellington nooooooo 😢
Poggers
It does looks impressive and quite powerful, but it somewhat looks a bit like flamethrower which means it looses lot of thrust on just throwing fuel.
But im not rocket scientist, im just throwing uneducated guesses here. 😀
That's a good observation! While we do burn quite fuel rich compared to most commercial rocket engines, I think the majority of what's contributing to the "flamethrower effect" might be the overexposure of this particular camera. We have another recording taken by a Fujifilm at 8x slowmotion that's significantly less exposed than this one that I think you might enjoy: ruclips.net/video/aHgL5cvsIDA/видео.htmlsi=o8zP8ya5ZWeUxo3q
There's some pretty interesting phenomenon that occur right at the 8th second of the 2nd hotfire!
@@SpaceConcordia Does it burn rich? They burned some extra fuel in Saturn 1 engines to prevent it from melting, at least that is my impression of it. F1 engines do look a bit like flamethrowers.
@@tomminystrom yup, exactly! you seem to have this rocket science stuff pretty down, you should join the team ;)
@@tomminystrom Most cycles burn rich. Notable exceptions being some older Russian and engines and new LOX/methane engines like BE-4 that borrowed a lot of inspiration from them.
That would sure come in handy to disperse those "just stop oil" idiots sitting in the road.
it didnt launch until the intense yell forced it to!!
kerbal rocket
CNBC
fire kabommmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
Taco bell jokes in 3... 2...
WTF BRO
mr bones is g o n e
Has to be on a FBI watch list now right?
Who isn't?
What would Greta Thurnberg say,! 😮 How dare you! Are you going to give the Palatinians the plans?
Скелет сдуло!
Well that's dumb! Rocket engines need to be light weight, and a 9,000 pound rocket engine is not light weight! ...... 🤣
Ok ....liquid .....no vortex ......or pulse jet......cheers
Student... so building a rocket isn't exactly rocket science
Students use science.
Bravo.....solid propellant.......no liquid.....I smell carbon fiber nosel.....cheers
It’s not hard when your school has money.
Trying to feel better about your failing life?
That’s a very crude solid rocket motor fuel with zero tech in it. Not impressed. They literally just know materials science. Cool.
John, this was a very rude and ill-informed comment. First off, it's a liquid - they say as much in the description.
And here's a textbook example of someone putting down other people's accomplishments to make themselves feel better. It's a liquid btw. Even if it was a solid, no need to shit on their hard work.
What have you done in your life
How do we get downvotes to show?