APCP Rocket Motor Test with Data. DIY Composite Rocket Motors

2:18 Oh damn, you got a mach diamond there!

Man I am still loving the rocket stuff. The shock diamonds or whatever they're called are sweet looking. Also random people reading this comment you should join the patreo so you can have early access to videos and be that annoying guy who leaves "first" comments. I also still find it wild you found the random tab welder video I have. I was thinking about that randomly last night and what the odds were of that and how I made that video for the AvE subs then found you through AvE (suggested video on the side) then a few months later you comment on that video. Tiny world here on youtube.

So same test meaning still over-expanded :) I saw the diamonds! Can't wait to see this thing with a tiny bit choked down nozzle for that sweet spot.

I love this channel so much. It's totally me deep down inside. Thanks for keeping me on track. It's easy to get distracted by every day hassles. It's nice to be relieved 😊 by raw science

Its awesome to watch you work. It shows that anyone can create these projects with self education and work. Will love to see a larger motor lift off. Best wishes to you and your family.

Haven't been back on this channel in a while and wow! APCP! So cool! Loved your sugar motors but I also was waiting to see you try APCP

I do a fair amount of epoxy casting and my go to parting agent is paste wax. A bit of taper on the rod would help a bunch also

Oh, man... I still love these shock diamonds... Keep it up, you've got amazing content! (In your videos, you do exactly, what i love doing in my backyard! ;D )

Hell yeah! Love the rocketry stuff on your channel. Can't wait to see bigger and thrustier engines ;)

And now you’re on a list! You were on a list before, but that was a different list. Keep it up! W00t!

Could you maybe do a multi-stage motor where the launch stage is a sugar motor and the second stage is one of these?

Also, to get better release you may want to look into making the central rod of your core mold out of either teflon or POM (polyoxymethylene, Delrin). Both are very slippery and nothing really adheres well to them. You can also 3d print POM.

another beautiful burn, very cool to see the data

Cant wait to see some of this in a rocket and not just a test on the pad. That will be awesome!

@ElementalMaker Just subscribed to you on Patreon, my first ever. THIS is the type of content I have been searching/waiting for friend! I have a goal of reaching level 3 NAR cert at some point (i'd like in the next 10 years), and to be able to do it with 100% from scrap material (if that is allowed). Everything rocketry interests me so keep it coming!

Love the rocket experiments!

Seems like this might be a good candidate for a second stage motor

have you considered a star core at the top to increase your initial boost? tiz just a thought ;)

If you're having trouble finding Mann400 (check Grainger's,) you can wrap the mandrel with Teflon plumber's tape, then peel it out after the grain cures. The ends of your grain failed to ignite, yielding a very progressive burn profile. Rough grain ends can be... problematic. To yield a more neutral thrust curve, you will want to promote a full Kn start. Cast your grains a bit too long, then trim to length, with both ends flat for a single grain motor, or very slightly concave for a multiple grain motor. And you don't want to "over-stuff" your case. You want tiny little gaps between the fwd closure, the grain, and the nozzle. To allow the ends to ignite. BTW... I've been making this stuff for twenty years. In case you're wondering...

awesomeness dude, now the next logical step is stacking 3 bates grains,