From: Bdale Garbee Date: Fri, 21 Jun 2019 23:19:18 +0000 (-0600) Subject: add test file skeleton for 11-grain KNSB cato, add new KNSB batch X-Git-Url: https://git.gag.com/?p=web%2Fgag.com;a=commitdiff_plain;h=f5c484819d67705a592793717bd4f6c498c49e4c;ds=sidebyside add test file skeleton for 11-grain KNSB cato, add new KNSB batch --- diff --git a/rockets/research/2019-test-7.mdwn b/rockets/research/2019-test-7.mdwn new file mode 100755 index 0000000..cb58753 --- /dev/null +++ b/rockets/research/2019-test-7.mdwn @@ -0,0 +1,16 @@ +# Test 2019-7 # + +This was a 11-grain 54mm KNSB motor using a #? nozzle. Ignition was +with one 45-cal pyrodex pellet on an e-match, on Friday at NCR North +on Mile High Mayhem weekend. + +The grains used were from the ? batches: + + +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 ## + +CATO. diff --git a/rockets/research/2019.06.21.mdwn b/rockets/research/2019.06.21.mdwn new file mode 100755 index 0000000..fdf191d --- /dev/null +++ b/rockets/research/2019.06.21.mdwn @@ -0,0 +1,46 @@ +# Batch 2019.06.21 # + +A total of 12 3" KNSB grains for 54mm cases. These were cast in two batches +that each consisted of a two 9" casting tubes, one each with 0.5 inch steel +and 0.625 inch Delrin cores. One batch was pure KNSB, the other was my usual +mixture with RIO and Polystep-B1 surfactant. Simple pour, insert coring rod, +top off grain. No vacuum processing or vibration. + +The 54mm casting tube I'm using weighs 1.9g per inch. + +The purpose of casting these grains is to do test stand burns of identical +motors in each of the two propellant variants, so I can tell how much the +RIO is affecting ignitability and burn rate. + +These grains were cast on 2019-06-21. + +## Results ## + +The batch size was pretty good, there was a bit of excess propellant in each +batch so we can make density and burn rate measurements after cure. The excess +weighed in at g after cure. + +Grains were cut, core drilled to 0.625", and sanded more or less ala Terry's +process. In the data below, lengths are a bit approximate due to imperfectly +squared ends, gross masses are precise using my new 600g by 0.01g scale! + +Batch with RIO: + +* Grain 1, " long, g gross, g casting tube, g net +* Grain 2, " long, g gross, g casting tube, g net +* Grain 3, " long, g gross, g casting tube, g net +* Grain 4, " long, g gross, g casting tube, g net +* Grain 5, " long, g gross, g casting tube, g net +* Grain 6, " long, g gross, g casting tube, g net + +Batch without RIO: + +* Grain 7, " long, g gross, g casting tube, g net +* Grain 8, " long, g gross, g casting tube, g net +* Grain 9, " long, g gross, g casting tube, g net +* Grain 10, " long, g gross, g casting tube, g net +* Grain 11, " long, g gross, g casting tube, g net +* Grain 12, " long, g gross, g casting tube, g net + +The mass per unit length was within ?g/inch. + diff --git a/rockets/research/index.mdwn b/rockets/research/index.mdwn index 6ce0de7..a237996 100755 --- a/rockets/research/index.mdwn +++ b/rockets/research/index.mdwn @@ -20,6 +20,8 @@ * [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 +* [2019 test 07](2019-test-7.html) - ? - 11-grain 54mm KNSB CATO at NCR North +* [2019 batch 04](2019.06.21.html) - 21 June 2019 - 12 54mm KNSB grains, half with RIO ### 2018 ###