test results from Hartsel launch

[web/gag.com] / rockets / research / 2017-test-02.mdwn

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+# Test 2017-02 #
+
+4 grain 54mm sorbitol motor burned on the test stand at
+a Tripoli Colorado launch in Hartsel on 21 May 2017.
+
+With a 13.250" liner, 8.9mm nozzle throat, buna-n o-rings, simulation says
+this is a 39% J-597, 1050 Ns, with about a 1.5 sec burn
+
+* Grain 2017-01-16, 189.1g gross, ?g net
+* Grain 2017-01-04, 185.8g gross, ?g net
+* Grain 2017-01-07, 186.7g gross, ?g net
+* Grain 2017-01-15, 186.9g gross, ?g net
+
+## Results ##
+
+We forgot to remove the protective stop, so no useful load cell data was
+collected.  Pressure data looks fine, and shows a burn that's more regressive 
+than expected.  There was significan slag accumulated on the forward closure 
+and in the pressure line.  For the future, we'll pack grease in the forward
+closure explicitly when building motors for test stand burns.
+
+Flight data logged as TeleFireOne sn 3634, flight 3.
+