Keith: > Uh, I think you're missing something here -- there's no change in any > acceleration values across apogee; the rocket trajectory is ballistic > precisely because the only large force acting on it is gravity, which is > constant. Your're right. :-) I really don't understand what the accelerometers are reporting. I assumed that the accel would detect the de-acceleration as the rocket reached apogee, reach a point of zero acceleration and then start accelerating back toward Earth. In retrospect, this is the vertical velocity vector. Since it is a vector and the rocket is pitching over the calculation requires some interpretation of the direction that the rocket is pointing. If the software is not integrating the direction of rocket, how do you estimate apogee by acceleration alone? Craig
_______________________________________________ altusmetrum mailing list [email protected] http://lists.gag.com/mailman/listinfo/altusmetrum
