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Of course, an additional constraint on piston radius is the allowable space inside the Avionics Bay Coupler. The Team previously found that 6491K254, which had a 1in radius, was large and provided little room for Avionics to house its hardware, especially the batteries. Thus, a logical conclusion is to restrict the new piston geometry to radii below 1in1 in, which will provide an even larger safety factor on premature separation due to a pressure differential.
Geometry
Given the allowable bore-radius range of 0.092 in → 1.51 in (and more accurately, a 1 in upper limit), we opt to initially select a radius of 0.50 in, which is roughly in the middle.
Resources:
The following resources are useful materials for learning about pressure vessel and piston theory:
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