On 08/20/2014 04:45 PM, Carl Tedesco wrote: > I am starting the process for getting a class 3 waiver for a rocket > launch. Most of the FAA required documentation looks straight forward. > One piece of information they require is "The dynamic stability > characteristics for the entire flight profile." A static stability > analysis is straight-forward, but I have never done a dynamic stability > analysis. > It appears that what is required is not dynamic stability but simply variation of CP and CG throughout the flight. At least that is what the example from Tripoli provides. Rocksim can plot many dynamic stability parameters if you really want to examine them. You probably should even if the FAA doesn't require it. -- David W. Schultz http://home.earthlink.net/~david.schultz Returned for Regrooving