Originally Posted by madmentos

Never,

its just bp, i will store indefinatley,


to make some:

make some bp, very very fine grade, mix up a little dextrose and water, mix with this.

get a film cannister, a g clamp a pencil, and this mixture.

pour in mixture, put in pencil, put in g clam, tighten pretty tight and leave over night out side,

Originally Posted by asilentbob

I seriously doubt that that film can design would develop enough thrust for much of anything.

Basic black powder rockets haven't changed much in design in hundreds of years... and beyond that the changes really weren't that great either. Its simple to make and works. There are countless tutorials on it all over the net and in reputable pyrotechnic publications.

Strong tube + rammer + hammer. Clay, BP/charcoal, any delay mix, more clay optional, header, then very carefully carving an exhaust hole with an ID between 1/4th and 1/3rd of the ID of the tube that its in in the plug and to a depth 1/4" less than the depth at which the motors cato... using a drill bit and rotating it between your fingers carefully...

Or... The same, but using a preformed spindel and hollow rammers instead of having to drill into the core... This is what 99% of hobbiests do. Rocket tooling is relativly cheap and available online, as are superb quality paper tubes... Or it can be turned on a lathe, there are schematics online... somewhere.

Or... The old way of doing chocked rocket nozzels... which is basically using a spindel, but deforming the paper into the shape of the nozzel and tying it inplace with strong string and glue, instead of using clay.