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Mixing Date
Serial Numbers
Site
Result
9-29-201798-PT #1, #217-110First two 98 mm grains mixed. Improper equivalent weight calculation lead to soft cure.
11-7-201798-PT #317-110Mixing to characterize EZ-Cast. Used old mixer.
11-12-201798-PT #417-110Used old mixer. Improvements to casting process. Slightly lower solids loading
11-14-201798-PT #5-717-110First mixing with new mixer. 3 characterization grain for characterization testing.
11-22-201798-PT #8-1017-1103 grains for characterization testing. Stopped using EZ-Cast.
11-28-201798-PT #11, #1217-110Used finalized casting procedures
12-6-2017OW-152 #1, #217-110First 6 inch grains. Densities were consistent with the 98mm grains used for characterization.
12-8-2017OW-152 #3-517-110Next 3 6 inch grains. 2 dogbones were also cast. Results pending.
12-20-2017OW-152 #6-8, OW-98-FIN117-110The "MegaMix"
1-30-2018OW-152 #9-1217-110Grains 1-4 for the Full Scale test motor. Each grain had a 1.7" core.
2-2-2018OW-152 #13-1617-110Grains 5-8 for the Full Scale test motor. Core diameters were 1.7" (2), 1.9" (1), and 2.25" (1)
3-??-2018OW-152 #17-2017-110Grains 1-4 for 8G motor test.
4-1-2018OW-152 #21-2417-110Grains 5-8 for 8G motor test.
5-17-2018OW-152 #25-2817-110Final mix of the school year, made four grains for a flight motor.

 

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Motors

Test #
Date
Site
Result
Characterization Static Fire #1November 25, 2017Crow IslandNozzle Failure
Characterization Static Fire #2November 25, 2017Crow IslandNozzle Failure
Characterization Static Fire #3November 25, 2017Crow IslandMotor success, pressure transducer failure
Characterization Static Fire #4November 25, 2017Crow IslandMotor success
Characterization Static Fire #5December 2, 2017Crow IslandMotor Success! Highest pressure to date: 695 psi
Characterization Static Fire #6December 2, 2017Crow IslandSuccess, excellent BATES curve
OW-152-4G #1Janurary 14, 2018Crow IslandFull Duration. First Try.
OW-152-4G #1Janurary 27, 2018Crow IslandSuccess
OW-98-FIN1 #1Janurary 27, 2018Crow IslandSuccess of a very angry motor
OW-152-8G #1Feburary 24, 2018Crow IslandFull Impulse. Thrust and Pressure higher than expected. Nozzle cracked.
OW-152-8G #2April 7, 2018Crow Island

Liner Burnthrough at T+3

OW-152-4G #3July 21, 2018FARSuccess. First Flight Motor.

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