Common
Model rocket motor classification
Motors for model rockets and high-powered rockets (together, consumer rockets) are classified by total impulse into a set of letter-designated ranges, from 1⁄8A up to O. The total impulse is the integral of the thrust over burn time. P T = ∫ 0 t F t h r u s t ( t ′ ) d t ′ = F a v e t . {\displaystyle P_{T}=\int \limits _{0}^{t}F_{thrust}(t^{\prime })dt^{\prime }=F_{ave}t.} Where t...
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