Nozzleless BP rockets

[Bobosan]

I have several rolls of Kapton tape that I'm going to experiment with as a piping. We used it to insulate surrounding SMD components from hot air rework heat when repairing PCB's. It doesn't melt at 800F.

 

The masking tape is the cheaper route though.

[Bobosan]

Tried some Kapton fuse piping today. It worked ok but probably need to spiral wrap the visco with it since the seams curled apart on one end.

 

http://youtu.be/C2sfWpscOds

 

http://youtu.be/Q4C1vE5aZRM

[Juiceh]

How you fuse your nozzless BP rockets really depends on the speed of your BP. With insanely fast 75-15-10 balsa BP I light mine at the base of the grain like a whistle motor. Lit this way my 1Lb motors launch 4 inch ball shells with ease. I have not tried top core lighting mine. I will once I can afford a test stand to measure the results. I have a feeling top core lighting might = CATO with these.

 

Here is a 75-15-10 Balsa BP Nozzless made on H/U tooling from Wolter. Accidentally pressed at 20,000 PSI on the grain, was shooting for 10,000psi but screwed up, performance at 10,000psi is pretty much the same. No oil or binder. Shell on top is a 4 Inch 3x WASP wrapped BP coated rice hulls shell with no stars or break booster.

http://www.youtube.com/watch?v=PaTyaPIeZpQ&feature=share&list=UUKwER9QXUzr7aB-_7vmB6kQ

 

 

Here is a 75-15-10 Balsa BP(same batch of fuel as above) Nozzless made on Wolter BP tooling, pressed at 10,000psi, no oil or binder. Shell on top is a 4 Inch 2x WASP wrapped BP coated rice hulls shell with no stars or break booster.

http://www.youtube.com/watch?v=OXCbw5tWhqw&feature=share&list=UUKwER9QXUzr7aB-_7vmB6kQ

 

Here is a pic of fusing of the UT nozzless motor in the vid above:

http://imageshack.us/a/img814/6369/nozzlelessfusing.jpg

[Bobosan]

Interesting. Very nice rockets and BP salute breaks. Were the rice hulls coated with the Balsa 75/15/10?

[Juiceh]

The rice hulls in the shells were coated with BP made with ordinary airfloat charcoal.