I built a PULSED ROCKET ENGINE

Printers I used

#rocket #engine #3dprinted

[kipschnitzel]

Video idea: make a rocket test stand that properly measures the thrust it produces! Beats a kitchen scale and it would be a fun project to watch.

Tomatoes are disgusting!

[andreasmuench]

Video Idea: 3D print some rocket powered toy cars and race them against each other (as a way of measuring the thrust of the rockets)

[Nighthawkinlight]

Never mind, don't ball mill ammonium perchlorate. Forgot how bad an idea that is. K nitrate will work much better if milled though.

[cptcrazyfingers]

Wow, your explanation of how a de Laval nozzle works was simple and effective. The visual aid was very helpful.

[priuxls]

Video idea: create a launchpad for 3d printed rockets and measure how high they will fly using different rocket nozzle designs+

And: Tomatoes are disgusting🍅🍅🤢

[Project-Air]

Testing until it explodes? - This gets a thumbs up from me!

[marsgizmo]

The progress on the rocket engines is increasing exponentially and always entertaining 👏😎 Looking forward to the next one! 😉

[Kraang]

Integza, you could try spiraling the fuel grain instead of having it be a straight bore, that might help it burn less chaotically.

I'm wondering if you could 3d print a multi-tool, it would be interesting to see what kind of an edge you could put on a ceramic 3d printed blade.

[wouldntyaliktono]

after you've nitrated the cotton, dissolve it in a solvent and reconstitute it. The surface area will be lower, so the burn rate will be more manageable.

[tiagooliveira]

5:15 It's my understanding that the gas heats up in the chocking point, it can't gain speed so the energy goes into heating up the gas, when you expand the nozzle the gas is able to expand and the speed increses.
ScottManly explains this very well on his Hypersonic wind tunnel video, go check his channel, I think you may like it

[johnkrazns]

Video Idea: Try to make APCP as a printable propeller, this would create much much higher thrust. Then insert the printed rocket motor in a 3d printed shuttle model like this you could create a semi accurate test flight of a miniature shuttle.

[paulgleason]

Video idea: Mostly for visuals, use an old school kitchen scale with an analog interface. You could see the movement in real time. Most have a clock like interface.

[PotatoLover]

Integza, thanks for using my battleship nozzle idea, and the cause of the pulsing and under performance of the engine is because the engine is getting chocked, either by inefficient burning causing residue to block the nozzle ( which may be fixed by having the nozzle side down ) or by the nozzle being over constricted ( which I believe is what caused the sputtering )

[mtoo]

Hey Integza, I make rockets every year (Guy Fawkes) in the same way commercial ones are made. The sugar KNO3 works fine (a small addition of sulphur helps) in a card tube. The grain is also the combustion chamber. I use builder's plaster filler to make the nozzle by laying it over a former. A tube shaped whole works well. I use a metal rod as a former.
Those oscillations in your burn were caused by two things, 1) the shape could be slightly inconsistent and 2) Up to a certain limit the rate of burn is proportional to the pressure in the chamber. So everything gets exaggerated.

The boosters for the shuttle are much the same. They use rubber and aluminium powder as the fuel with perchlorate as the oxidiser. The core is a simple tube. P.S. Have you heard the story about the boosters and the size of a roman horse's butt? let me know...

[PlasmaChannel]

NASA would like you to stop lurking around their website Joel. They already have been one upped by SpaceX, and an IntegzaX would break the cat. Sick video brother!

[andrewhopper]

Cannot believe I'm finding this channel just now, this is by far my favorite engineering channel now.

[travismasters]

Video Idea - Since all of us love rockets and some of us have 3D printers, your followers should try designing rocket nozzles (and try them out if they dare) and submit them to you somehow to see which rocket nozzle performed the best! Heck maybe a tomato shaped rocket nozzle would be the winner 😉

[InvestmentJoy]

Very cool. From what I've researched, I think in general it's just going to be a problem until you can find out the perfect mix of oxidizers and fuels that can be printed because I know that they typically moderate ammonium perchlorate with other chemicals to control the Burn Speed and I'm sure that NASA has multiple documents on it they use a couple different kinds of plasticizers that also have moderation capability

[blindsniper]

Add aluminum powder to the mix. That should improve the performance. Perchlorate, aluminum and rubber is a solid rocket fuel. So you would have perchlorate aluminum and resin should perform decently if you can get it to print.

[Derpyforderpy]

Idea for some of your older projects? Husky high performance blow gun with ultimate flow tip. Look this up. That tip can nearly double the output when air is blown through it. Maybe it can be used on some of you're previous projects to increase thrust. The higher the output, the stronger the thrust.