Summary
This was a successful test that used 0.2 grams of black powder in the piston and 3x 6-32 shear pins. Following the test, we also performed a tug-test on the parachute, the results of which are summarized below.
Black Powder Calculations
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- Admittedly this math is sensitive to the volume, which we only estimated.
- The BP calculator assumes an ideal gas, which isn't true.
Media
Video of test: Ground Test 10-2.MOV
The black powder did not travel very far up the bore of the piston (the approximate demarcation is dotted in the image above–note that some of the residue past the demarcation is permanent discoloration from previous tests).