Summary
This was a successful test that used 0.2 grams of black powder in the piston and 3x 6-32 shear pins.
Black Powder Calculations
This ground test used 0.2 grams of black powder, which was calculated in the following manner:
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Step 4: Determine PSI inside the piston necessary to achieve required force
Using this black powder calculator and the previous quantities, we determined that 0.2 grams of black powder would be necessary to achieve 360 lb-f.
Step : Evaluate Assumptions
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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.