Test 2019-5

This was my second flight with "Everclear".

5 grain 54mm Everclear motor with #36 nozzle, using one 45-cal pyrodex pellet on an e-match for ignition. Flown at Tripolo Colorado Spring Fling 2019 on Sunday morning.

The grains used were from the 21 May 2019 batch:

• 21 May grain 6
• 21 May grain 3
• 21 May grain 16
• 21 May grain 8
• 21 May grain 2

Used abou 16.75" of ARR liner. 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

PFND.

Tiny bit of liner burn-through at the junction between grains 6 and 3 (one grain forward of the nozzle). The buna-n o-rings were pretty cooked on the nozzle end, but no evidence of blow-by.

Forgot to get pre-flight masses. The post-flight mass of the airframe and motor was 4140g. That's complete except for maybe 3-5g in the ejection charges, and of course the propellant consumed.

Flight data in 2019-05-26-serial-1257-flight-0018.eeprom shows 9170 ft GPS apogee.