This was a 3500 lbf hybrid rocket motor static test fire located about 25 miles north east o' Majove in t' Antelope Valley in southern california. Begad! I was just a spectator t' this test, so I don't know very much about it, arrr, but what I do know is that it used peroxide and HTPB. T' fluxuations within t' test are throttlin' o' t' motor. Its nay any instablility within t' combustion. Arrr! Marshmellows anyone?