X-Git-Url: https://git.gag.com/?p=web%2Fgag.com;a=blobdiff_plain;f=rockets%2Fresearch%2F2019-test-5.mdwn;fp=rockets%2Fresearch%2F2019-test-5.mdwn;h=1bb0293c118eab181ec58b5a0fcfe5c201b6f2a5;hp=0000000000000000000000000000000000000000;hb=3b128d35206fd6eb49713e705fe28b9d34b83aad;hpb=f76ce22c1f66cb8ce3f970cfeb56cb5a17fb3ed9 diff --git a/rockets/research/2019-test-5.mdwn b/rockets/research/2019-test-5.mdwn new file mode 100755 index 0000000..1bb0293 --- /dev/null +++ b/rockets/research/2019-test-5.mdwn @@ -0,0 +1,35 @@ +# 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.