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This system was placed on a 3 in motor. The casing for the HEI (the unlabeled black thing outside the HEI grain) is 1/8th inch phenolic. It is easy to crack. In this case, the o ring grooves cannot be even slightly over the diameter listed in the Parker O ring guide. This will result in snapping the casing. It is also difficult to cut. We use a miter saw and found that the best method is to go slowly and have lots of extra stock because it cannot handle shear stresses well.
Pictures
Tests
| Test | Location | Date | Notes |
|---|---|---|---|
| HEI Only Test | Bldg. 37 Blast Chamber | April 2019 | Success! |
| Friends of Amateur Rocketry | July 6, 2019 | Very Successful! | |
| HEI Only Test | Bldg. 37 Blast Chamber | July 2022 | Failure - loss of pressure |
| Static Fire | Crow Island Airfield | July 2022 | Failure - loss of pressure |
| HEI Only Tests | Bldg. 37 Blast Chamber | September- October 2022 | Mostly successes, some struggles with ignition |
| Static Fire | Crow Island Airfield | October 2022 | Success! |