KevinT
Well-Known Member
Working on my L3. My rocket is 130" long, 5.5" diameter with 3 fins. When I run the design in Rocksim it calculates a Cp of 100.4" using the Rocksim Stability Equations, and in RASAero it calculates 95.4" using the Roger's modified Barrowman equations. This is roughly a caliber in difference. The motor is an AT M1939W . Does anyone have any recommendations on which is a better predictor of Cp.