From f8ddf86eb701ba78484d5049b5acbbc53c031e17 Mon Sep 17 00:00:00 2001 From: Bdale Garbee Date: Mon, 22 May 2017 17:19:23 -0600 Subject: [PATCH] test results from Hartsel launch --- rockets/research/2017-batch-01.mdwn | 40 ++++++++++++++--------------- rockets/research/2017-batch-02.mdwn | 6 +++++ rockets/research/2017-test-01.mdwn | 18 +++++++++++++ rockets/research/2017-test-02.mdwn | 23 +++++++++++++++++ rockets/research/2017-test-03.mdwn | 19 ++++++++++++++ rockets/research/2017-test-04.mdwn | 23 +++++++++++++++++ rockets/research/index.mdwn | 8 ++++-- 7 files changed, 114 insertions(+), 23 deletions(-) create mode 100755 rockets/research/2017-test-01.mdwn create mode 100755 rockets/research/2017-test-02.mdwn create mode 100755 rockets/research/2017-test-03.mdwn create mode 100755 rockets/research/2017-test-04.mdwn diff --git a/rockets/research/2017-batch-01.mdwn b/rockets/research/2017-batch-01.mdwn index 2e1538c..2abc436 100755 --- a/rockets/research/2017-batch-01.mdwn +++ b/rockets/research/2017-batch-01.mdwn @@ -22,28 +22,26 @@ Liner should be cut to 13.25" long for a 4-grain reload. ## 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 ## - diff --git a/rockets/research/2017-batch-02.mdwn b/rockets/research/2017-batch-02.mdwn index faabcef..9825e38 100755 --- a/rockets/research/2017-batch-02.mdwn +++ b/rockets/research/2017-batch-02.mdwn @@ -41,6 +41,12 @@ These igniters were made on 17 May 2017. ## 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 diff --git a/rockets/research/2017-test-01.mdwn b/rockets/research/2017-test-01.mdwn new file mode 100755 index 0000000..f5f332c --- /dev/null +++ b/rockets/research/2017-test-01.mdwn @@ -0,0 +1,18 @@ +# 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. diff --git a/rockets/research/2017-test-02.mdwn b/rockets/research/2017-test-02.mdwn new file mode 100755 index 0000000..6d1bfdb --- /dev/null +++ b/rockets/research/2017-test-02.mdwn @@ -0,0 +1,23 @@ +# 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. + diff --git a/rockets/research/2017-test-03.mdwn b/rockets/research/2017-test-03.mdwn new file mode 100755 index 0000000..0c04dc0 --- /dev/null +++ b/rockets/research/2017-test-03.mdwn @@ -0,0 +1,19 @@ +# 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. diff --git a/rockets/research/2017-test-04.mdwn b/rockets/research/2017-test-04.mdwn new file mode 100755 index 0000000..14014a4 --- /dev/null +++ b/rockets/research/2017-test-04.mdwn @@ -0,0 +1,23 @@ +# 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. diff --git a/rockets/research/index.mdwn b/rockets/research/index.mdwn index 7f47669..e0e819a 100755 --- a/rockets/research/index.mdwn +++ b/rockets/research/index.mdwn @@ -4,13 +4,17 @@ * [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 -- 2.30.2