Mindphreak Posted June 26, 2009 Posted June 26, 2009 Alright, so I've had some good bp rockets as well as bad using different nozzel hole widths. As a question, what is the reccomended (starting point) width of the hole? I read 1/2 the I.D. somewhere but that does not seem quite right, as the holes look too big. Also, if my I.D. is X centimeters, should my nozzle extend X centimeters into the rocket?Lastly, if my bp is already powdered, how long should I mill it for before using it in a rocket? I know rocket grade bp is low, but should 2 hours work? I want to develope consistant results with these rockets.Thanks for your help, I had trouble finding the exact nozzle dimensions.
Mumbles Posted June 26, 2009 Posted June 26, 2009 Core burners generally start a 1/3 ID, and core burners at 1/4 ID. The nozzle should be 3/4 to 1 ID thick. Most people don't mill the comp for core burners, and for end burners, I'd recomend making with whatever your normal lifting/bursting BP is.
Mindphreak Posted June 26, 2009 Author Posted June 26, 2009 Core burners generally start a 1/3 ID, and core burners at 1/4 ID. Alright that works. In your first sentence did you mean end burners?
Mumbles Posted June 26, 2009 Posted June 26, 2009 Opps, I mistyped. Core burners start at 1/3 ID, END burners at 1/4 ID.
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