From 7b3e268527a3c8214f810a2a625fddd792e99fde Mon Sep 17 00:00:00 2001 From: Bdale Garbee Date: Sat, 3 Jun 2017 22:22:45 -0600 Subject: [PATCH] more info about flights at MHM --- rockets/research/2017-test-03.mdwn | 7 ++++++- rockets/research/2017-test-06.mdwn | 3 +++ rockets/research/2017-test-07.mdwn | 29 +++++++++++++++++++++++++++++ 3 files changed, 38 insertions(+), 1 deletion(-) create mode 100755 rockets/research/2017-test-07.mdwn diff --git a/rockets/research/2017-test-03.mdwn b/rockets/research/2017-test-03.mdwn index 0c04dc0..45f788f 100755 --- a/rockets/research/2017-test-03.mdwn +++ b/rockets/research/2017-test-03.mdwn @@ -4,7 +4,12 @@ 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 +this is a 25% J-432, 763 Ns, with about a 1.6 sec burn: + + +
54mm 3-grain Sorbitol
Rating:25% J-432Max Pressure:7.04 MPa (1021 psi)
Total Impulse:763 NsSpecific Impulse:135 s
Max Thrust:557 NVolume Loading:71%
Average Thrust:432 NFuel Mass:578 g
null
+ + * Grain 2017-01-01, 176.1g gross, ?g net * Grain 2017-01-03, 187.6g gross, ?g net diff --git a/rockets/research/2017-test-06.mdwn b/rockets/research/2017-test-06.mdwn index 4c65608..fd26ef0 100755 --- a/rockets/research/2017-test-06.mdwn +++ b/rockets/research/2017-test-06.mdwn @@ -20,4 +20,7 @@ Total of 110.8g propellant, vs 122g simulated. ## Results ## +Flown in Robert's Madcow Little John at NCR's Mile High Mayhem on 3 June 2017, +PFND. Used two Twiggy igniters wired in parallel. + Flight data logged as ? sn ?, flight ?. diff --git a/rockets/research/2017-test-07.mdwn b/rockets/research/2017-test-07.mdwn new file mode 100755 index 0000000..9d5a50c --- /dev/null +++ b/rockets/research/2017-test-07.mdwn @@ -0,0 +1,29 @@ +# Test 2017-07 # + +6 grain 29mm erithritol motor + +With a 10.4" liner, 14/64" nozzle throat, buna-n o-rings, simulation says +this reload will be a 43% H-162, 216 Ns, with about a 1.2 sec burn: + +

+ +
29mm 6-grain Erythritol #14
Rating:43% H-162Max Pressure:5.92 MPa (859 psi)
Total Impulse:216 NsSpecific Impulse:133 s
Max Thrust:206 NVolume Loading:70%
Average Thrust:162 NFuel Mass:165 g
null
+ +

+ +* Grain 2017-03-01, 26.57g gross, 25.44g net +* Grain 2017-03-02, 26.63g gross, 25.50g net +* Grain 2017-03-03, 26.65g gross, 25.52g net +* Grain 2017-03-04, 26.01g gross, 24.88g net +* Grain 2017-03-05, 26.51g gross, 25.38g net +* Grain 2017-03-06, 26.75g gross, 25.62g net + +Total of 152.34g propellant, vs 165g simulated. + +## Results ## + +Flown in Robert's Madcow Little John at NCR's Mile High Mayhem on 3 June 2017, +PFND. Used two Twiggy igniters wired in parallel. Lit the motor fine, but +it took a long time to come up to pressure... + +Flight data logged as ? sn ?, flight ?. -- 2.30.2