With these rocket motor kits you can build the big brother version of the hobby store motors. Spindles are made from stainless steel. The "A" rammer is also made of stainless steel (except in the 4 and 6 pound sizes, which are aluminum). The kit comes complete with spindle, base combo, two rammers, puller, and instructions.
Fuel is ball milled black powder. If the fuel needs a little extra kick, 4F can be added. Whistle mixes may also be used as fuel. If whistle mix is being used as a fuel, the rocket motors must be pressed.
