Best Long Burn Rocket Motor Yet!

In this video I test the rocket motor I made again, but this time with fuel formula 79% AP, 15% Epoxy, and 6% Aluminum. I tried this formula before, but the motor failed (as seen in a previous video). This time I made sure to pack the fuel in much tighter, the nozzle was slightly (very minimal amount) wider, and the weld for the nozzle was much better. I am still not exactly sure what caused it to explode last time, and it may have been multiple things that all led to failure. However, what I did this time worked and I am happy about it. The thrust appeared to be higher overall as well, which is why I am going to put the motor in a rocket for the next test. About the voice-over: I am just doing it for fun this video but am not planning to do it in other videos unless many people want me to.

[MrHichammohsen]

Okay the Lox video was cool but this is sick! I used to make rocket motors but never got that much burn time.

[I___]

seemingly a very low rate of exit of gases, and hence the pressure in the chamber. it looks like the pressure is 2-3 atmospheres, not more. Not enough for a rocket. If you raise the pressure 10 times, then it will burn out in 8 seconds. It suits you?

[skyprop]

Basically what you have there is a very cool reusable(?) Road Flare for the same reason Igoo stated here. However Very cool Nonetheless!

[jerwilllefevers]

Applause, that would make a great high altitude multistage(most likely 2, maybe 3) motor if attempted! Wink wink wink wink

[wesleybowles]

Woah real nasa film colorized. Could I purchase some original film from you.

[EdisonWong]

Nice long burn motor! But that motor casing is getting red hot! According to NFPA 1125 (1125-16), the motor casing shouldn't get more than 200C (392F) for motors under 160 N-s of total impulse and not more than 220C (428F) for motors over 160 N-s of total impulse. And looking at your motor, it seems way more than 392F/428F. I would be a bit careful putting this into a rocket without (A. Better insulation between the motor casing and the grains, or B. reducing the burn time, (both of which will reduce the temperature of the casing)), because that will absolutely melt/set fire your (probably) cardboard/plywood/plastic motor mount on your rocket. Good luck!