Model Rocket Engines, Theory and Design

E. J. Clinger and Wesley D. Smith 

ABSTRACT: A semi-empirical theory is presented for the design of model rocket motors that use Black Powder for fuel. By choosing the values of a few adjustable parameters, a hobbyist can construct motors that perform satisfactorily without extensive or dangerous trial and error. Formulas are given for calculating the nozzle diameter, the combustion chamber height, and such performance descriptors as specific impulse and average thrust for any size of model rocket motor.

Keywords: model rocketry, Black Powder, rocket propulsion theory

Ref: JPyro, Issue 5, 1997, pp1-7

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