On Thu, 26 Jan 1995, Jon Poland SE Sun St Louis wrote: > I do think it would be interesting to put a microprocessor into a model > rocket but haven't found a good application that justifies this method over > other telemetry methods. Other telemetry methods? What other telemetry methods? I suppose you can measure the angle of ascension and do the trig to find altitude, but that never seems to be very accurate. You can also measure it's time of flight, but this is only as accurate as the person doing the timing and gives you the average. A microprocessor (and appropriate pressure sensors) could give you accurate altitude, airspeeds, acceleration profile, etc.