## Results ##
-* Grain 1, ?g gross, ?g net
-* Grain 2, ?g gross, ?g net
-* Grain 3, ?g gross, ?g net
-* Grain 4, ?g gross, ?g net
-
-* Grain 5, ?g gross, ?g net
-* Grain 6, ?g gross, ?g net
-* Grain 7, ?g gross, ?g net
-* Grain 8, ?g gross, ?g net
-
-* Grain 9, ?g gross, ?g net
-* Grain 10, ?g gross, ?g net
-* Grain 11, ?g gross, ?g net
-* Grain 12, ?g gross, ?g net
-
-* Grain 13, ?g gross, ?g net
-* Grain 14, ?g gross, ?g net
-* Grain 15, ?g gross, ?g net
-* Grain 16, ?g gross, ?g net
+* Grain 1, 176.1g gross, ?g net
+* Grain 2, 187.8g gross, ?g net
+* Grain 3, 187.6g gross, ?g net
+* Grain 4, 185.8g gross, ?g net
+
+* Grain 5, 187.9g gross, ?g net
+* Grain 6, 188.3g gross, ?g net
+* Grain 7, 186.7g gross, ?g net
+* Grain 8, 181.3g gross, ?g net
+
+* Grain 9, 191.0g gross, ?g net
+* Grain 10, 190.3g gross, ?g net
+* Grain 11, 189.2g gross, ?g net
+* Grain 12, didn't weigh, burned in open air as a test grain
+
+* Grain 13, 184.5g gross, ?g net
+* Grain 14, 188.6g gross, ?g net
+* Grain 15, 186.9g gross, ?g net
+* Grain 16, 189.1g gross, ?g net
With a 13.250" liner, 8.9mm nozzle throat, buna-n o-rings, simulation says
this makes a 39% J-597, 1050 Ns, with about a 1.5 sec burn
-## Observations ##
-
## Results ##
+They didn't work. The basic problem is that the pyrogen on the Chinese
+e-matches is aggressive enough that they blow the end of the epoxy fire
+cylinder apart without igniting the rest of the igniter. Might be worth
+trying again using home-made bridge wires on shooter wire ends instead of
+starting with a commercial e-match?
+
## Observations ##
A 10g batch was just enough to make up 6 igniters, and the pot life seemed
--- /dev/null
+# Test 2017-01 #
+
+4 grain 54mm sorbitol motor flown in Robert's "High Voltage" airframe 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 2017-01-14, 188.6g gross, ?g net
+* Grain 2017-01-13, 184.5g gross, ?g net
+* Grain 2017-01-11, 189.2g gross, ?g net
+* Grain 2017-01-08, 181.3g gross, ?g net
+
+## Results ##
+
+Perfect flight, no damage.
+
+Flight data logged as TeleMetrum sn 2163, flight 6.
--- /dev/null
+# 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.
+
--- /dev/null
+# Test 2017-03 #
+
+3 grain 54mm sorbitol motor burned on the test stand at
+a Tripoli Colorado launch in Hartsel on 21 May 2017.
+
+With a 10.250" liner, 8.9mm nozzle throat, buna-n o-rings, simulation says
+this is a 25% J-432, 763 Ns, with about a 1.6 sec burn
+
+* Grain 2017-01-01, 176.1g gross, ?g net
+* Grain 2017-01-03, 187.6g gross, ?g net
+* Grain 2017-01-10, 190.3g gross, ?g net
+
+## Results ##
+
+Good data collected. Also a more regressive looking burn than expected. Still
+had slag accumulation, but was much easier to clean up thanks to grease in
+the forward closure pressure port.
+
+Flight data logged as TeleFireOne sn 3634, flight 4.
--- /dev/null
+# Test 2017-04 #
+
+4 grain 54mm sorbitol motor flown in Robert's "High Voltage" airframe 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 2017-01-05, 187.9g gross, ?g net
+* Grain 2017-01-06, 188.3g gross, ?g net
+* Grain 2017-01-02, 187.8g gross, ?g net
+* Grain 2017-01-09, 191.0g gross, ?g net
+
+## Results ##
+
+On site, we recorded this as a perfect flight with no damage. However, once
+home, when we tried to pull the motor out of the airframe, it wouldn't come
+out. Turns out we had a near-CATO. The forward closure pushed the forward
+snap ring about 25% out of the groove, mushrooming the front of the case in
+the process. We discarded the forward snap ring and will need to trim and
+re-groove the case, but the nozzle and forward closure seem fine.
+
+Flight data logged as TeleMetrum sn 2163, flight 7.
* [Richard Nakka's Site](http://www.nakka-rocketry.net/)
* [Scott Jolley's Site](http://ajolleyplace.com/scott.html)
-* [Scott Fintel's Site](http://www.thefintels.com/aer/rocketindex.htm)
+* [Scott Fintel's Site](http://www.thefintels.com/aer/rocketindex.htm) - defunct?
* [James Yawn's Site](http://jamesyawn.net/index.htm)
-## Test Log ##
+## Activity Log ##
### 2017 ###
+* [2017 test 04](2017-test-04.html) - 21 May 2017 - 4-grain 54mm KNSO flight
+* [2017 test 03](2017-test-03.html) - 21 May 2017 - 3-grain 54mm KNSO on test stand
+* [2017 test 02](2017-test-02.html) - 21 May 2017 - 4-grain 54mm KNSO on test stand
+* [2017 test 01](2017-test-01.html) - 21 May 2017 - 4-grain 54mm KNSO flight
* [2017 batch 02](2017-batch-02.html) - 17 May 2017 - 6 epoxy fire igniters
* [2017 batch 01](2017-batch-01.html) - 15 May 2017 - 16 54mm KNSO grains
projects / web / gag.com / commitdiff