In a message dated 11/18/02 8:33:25 PM, [EMAIL PROTECTED] writes: << The relatively loosely packed foam discs are probably the element of the system most easily impacted by dynamic effects.
Have you fired the engine in the vehicle with it restrained, and had it run smooth there, only to run rough when it is unrestrained? >Yes, it always seems fine on the test stand. During the KISS2 flights, it ran smooth for various times (1-2 seconds) initially, then went into 'rough' mode (+/- 3 G oscillations during a 4G acceleration). On one of the KISS3 flights, it did a similar thing, but on the other flight it seemed to oscillate the entire time. Note we probably can't fully trust the accelerometer data, but we do hear a 'chugging' sound during ascent. You had it run rough in a blow-down flight, then run smooth on the test stand afterwards? >Yes, but I usually had to add in one layer to make up for settling/shrinkage after each firing sequence (either test stand or flights). >I can't quite imagine how this pattern would initiate itself, given the pressure drop through the catpack. We are going to try and reproduce this effect during a static test, then attempt to fix with a homemade CV. >Dan John Carmack >> _______________________________________________ ERPS-list mailing list [EMAIL PROTECTED] http://lists.erps.org/mailman/listinfo/erps-list
