Test 2019-6

This was a 4-grain 54mm Everclear motor using a #32 nozzle. Ignition was with one 45-cal pyrodex pellet on an e-match, on Sunday at the Tripoli Colorado Spring Fling event near Hartsel.

The grains used were from the 21 May 2019 batch:

• 21 May grain 1
• 21 May grain 5
• 21 May grain 11
• 21 May grain 10

Small profile o-rings were used between grains, leaving the grains still slightly "loose" in the case. The buna-n o-rings on the nozzle and forward closure were lightly greased, and the liner exterior was heavily greased.

Results

Test stand data in 2019-05-26-serial-3634-flight-0030-5.eeprom.

About a 2.5 second burn. Sadly, we only got pressure and not load cell data, so no real characterization.

No liner burn-through, no discernable throat erosion, nozzle end o-rings were fairly cooked but no evidence of blow-by.