18 years ago
Utilizing RockSim in my current project; a "toy-bashed" Mini Crayon
rocket I've noticed a significant difference in the CP calc performed
by the proprietary RockSim method and the classical Barrowman. In my
design, with an Estes E9-6 loaded, Barrowman yields a CP with a static
margin of -.04 while RockSim yields a static margin of 1.64. On a
short stubby rocket such as this (10.5 " x 2.5") we're talking about
the difference between instability and a comfortable margin of safety.
Who should I believe?
I've glanced at a few RockSim files and this discrepancy does seem to
be most pronounced on such short stubby rockets. Am I right here?
Thanks in advance...
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