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ST015 - 1D/16C/.5B/.375N/335P

A project log for High Power Experimental Rocket Platform

Experimental high power rocket with active stabilization, live telemetry, autonomous GPS guided recovery and HD video

j-m-hopkinsJ. M. Hopkins 07/26/2015 at 14:110 Comments

The image of this static is with a lot of morning backlight which drowns out the image a bit.

This was the second test on my new thrust measuring stand and I received some good data this time.

This data gives a 91% H motor, classified as H367. This seems a little low and might be due to stand calibration issues. I was expecting more of a lower to mid level I class. The graph shows thrust in pounds to clarify any confusion.

The progressive burn rate was expected, but the larger regressive side was a bit interesting as I was expecting more of a sudden drop off.

This thrust characteristic might also be due to longer ignition time causing the bore to burn more fuel at the top of the motor prior to full bore ignition. This would allow a tapered erosive burn profile to occur which would match the graph.

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