3 4 grain 54mm sorbitol motor flown in Robert's "High Voltage" airframe at
4 a Tripoli Colorado launch in Hartsel on 21 May 2017.
6 With a 13.250" liner, 8.9mm nozzle throat, buna-n o-rings, simulation says
7 this is a 39% J-597, 1050 Ns, with about a 1.5 sec burn
9 * Grain 2017-01-05, 187.9g gross, ?g net
10 * Grain 2017-01-06, 188.3g gross, ?g net
11 * Grain 2017-01-02, 187.8g gross, ?g net
12 * Grain 2017-01-09, 191.0g gross, ?g net
16 On site, we recorded this as a perfect flight with no damage. However, once
17 home, when we tried to pull the motor out of the airframe, it wouldn't come
18 out. Turns out we had a near-CATO. The forward closure pushed the forward
19 snap ring about 25% out of the groove, mushrooming the front of the case in
20 the process. We discarded the forward snap ring and will need to trim and
21 re-groove the case, but the nozzle and forward closure seem fine.
23 Flight data logged as TeleMetrum sn 2163, flight 7.