From: Bdale Garbee Date: Mon, 27 May 2019 18:29:40 +0000 (-0600) Subject: capture skeletal data from latest tests X-Git-Url: https://git.gag.com/?p=web%2Fgag.com;a=commitdiff_plain;h=3b128d35206fd6eb49713e705fe28b9d34b83aad capture skeletal data from latest tests --- diff --git a/rockets/research/2019-test-3.mdwn b/rockets/research/2019-test-3.mdwn new file mode 100755 index 0000000..e4b095f --- /dev/null +++ b/rockets/research/2019-test-3.mdwn @@ -0,0 +1,21 @@ +# Test 2019-3 # + +Re-starting the process of characterizing "Everclear" now that we have a new +1600psi pressure sensor on the test stand. + +This was a 2-grain 54mm Everclear motor using a #24 nozzle. Ignition was +with one of Terry's igniters, on Saturday at the Tripoli Colorado Spring +Fling event near Hartsel. + +The grains used were from the 21 May 2019 batch: + +* 21 May grain 4 +* 21 May grain 12 + +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 2019-05-25-serial-3634-flight-0029.eeprom. diff --git a/rockets/research/2019-test-4.mdwn b/rockets/research/2019-test-4.mdwn new file mode 100755 index 0000000..af9931c --- /dev/null +++ b/rockets/research/2019-test-4.mdwn @@ -0,0 +1,24 @@ +# Test 2019-4 # + +This was a 3-grain 54mm Everclear motor using a #24 nozzle. Ignition was +with one of Terry's igniters, on Saturday at the Tripoli Colorado Spring +Fling event near Hartsel. + +The grains used were from the 21 May 2019 batch: + +* 21 May grain 5 +* 21 May grain 14 +* 21 May grain 7 + +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 2019-05-25-serial-3634-flight-0030-4.eeprom. + +There was a fairly significant liner burn-through in the middle of the first +grain near the nozzle, burned-looking area was dime-sized, with maybe 1/4" +"hole" in the middle. Some extra ash on case there, but no obvious signs of +weakening of the case. Not sure what that was caused by? 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. diff --git a/rockets/research/2019-test-6.mdwn b/rockets/research/2019-test-6.mdwn new file mode 100755 index 0000000..a27072f --- /dev/null +++ b/rockets/research/2019-test-6.mdwn @@ -0,0 +1,23 @@ +# 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 2019-05-25-serial-3634-flight-0030-5.eeprom. + +No liner burn-through, no discernable throat erosion, nozzle end o-rings +were fairly cooked but no evidence of blow-by. diff --git a/rockets/research/index.mdwn b/rockets/research/index.mdwn index c3ddb9b..6ce0de7 100755 --- a/rockets/research/index.mdwn +++ b/rockets/research/index.mdwn @@ -11,10 +11,15 @@ ### 2019 ### -* [2019 batch 01](2019.01.07.html) - 7 January 2018 - 4 54mm Everclear APCP grains -* [2019 batch 02](2019.01.08.html) - 8 January 2018 - 4 54mm Everclear APCP grains -* [2019 test 01](2019-test-1.html) - 28 April 2018 - 2-grain 54mm Everclear on test stand -* [2019 batch 03](2019.05.21.html) - 21 May 2018 - 16 54mm Everclear APCP grains +* [2019 batch 01](2019.01.07.html) - 7 January 2019 - 4 54mm Everclear APCP grains +* [2019 batch 02](2019.01.08.html) - 8 January 2019 - 4 54mm Everclear APCP grains +* [2019 test 01](2019-test-1.html) - 28 April 2019 - 2-grain 54mm Everclear on test stand +* [2019 test 02](2019-test-2.html) - 4 May 2019 - first flight using Everclear +* [2019 batch 03](2019.05.21.html) - 21 May 2019 - 16 54mm Everclear APCP grains +* [2019 test 03](2019-test-3.html) - 25 May 2019 - 2-grain 54mm Everclear on test stand +* [2019 test 04](2019-test-4.html) - 25 May 2019 - 3-grain 54mm Everclear on test stand +* [2019 test 05](2019-test-5.html) - 26 May 2019 - second flight using Everclear +* [2019 test 06](2019-test-6.html) - 26 May 2019 - 4-grain 54mm Everclear on test stand ### 2018 ###