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WHISTLING PROPELLANT #2

SOURCE: John Steinberg

COMMENTS: Whistle rockets must be made in the same way as a standard firework whistle, in the sense that it must be pressed very firmly for it to produce a whistling effect. The catalyst can be any metal oxide, though the usual ones used are titanium dioxide, copper oxychloride, and red iron oxide.

DANGER/CAUTION
Whistle compositions should NEVER be rammed. They must be pressed, or an explosion may result.   

PREPARATION (parts by weight):

CHEMICALPERCENT/PARTSAMOUNT
Potassium perchlorate
0.730
Potassium benzoate OR sodium benzoate
0.260
Catalyst
+1
Petroleum jelly  +2.5%
Total


NOTE: +2.5% is 0.025 x batch weight
(For example: 0.025 x 200 g = 5)