HYBRID BLACK POWDER ROCKETS - by Steve La Duke. In this 100-minute seminar, Steve demonstrates black powder rockets that whistle! See the traditional black powder tail, get the expected snort, but now discover the secret to making them whistle. Steve shows you his special nozzle material, how to avoid _ram jam”, make anti-stick spindles. Learn how to figure stick length and an easy-to-make header tube.
Price:
$19.95
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