After reading that superb report of the latest static test, it seemed appropriate to cross-post this link that just showed up on the arocket list. Great single-page source for some document downloads on issues that are quite topical for our current phase of development and testing. http://www.rasaero.com/dl_solid_motor.htm My intent in posting this is not in the least to be critical. Au contraire, I have nothing but kudos for our testing program and team. This is just some very interesting reading that's worth saving in a MOTOR_DESIGN folder somewhere in a hard disk archive. "Departures from Ideal Performance", for example, seems relevant to our quest of trying to maximize the performance of our <cough> inherently mediocre fuel <cough, cough, grin> Enjoy! Mark L. DC