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Tom West's Custom PC77 PumpMaster Classic Short Rifle

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Sure you could - Provided you choose a short enough initial linear stroke.

August 6 2012 at 2:45 PM

Steve in NC  (Login pneuguy)
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Response to At twice the piston area, I don't think I could get the handle pushed in. n/t

With your piston area of 0.83sq_in, you'd get 25lbs of force at a pressure 30psig, which is a compression ratio of 3:1, or an initial stroke of about 5.67".

So possible geometry would be: 5.67" of linear stroke, followed by 2.83" of lever-assisted stroke, for a 3:1 improvement in leverage and mechanical advantage.


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