New advances in hand pumps

Cannons powered by pneumatic pressure (compressed gas) using a valve or other release.
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Lentamentalisk
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you cant get to 350psi with a 3/4" tube unless you put 154lbs of force on your plunger... the 1/2" pipe would only need 68lbs of force, and the 1/4" can get to 1000 with only 50lbs of force... I dont know where you are getting your numbers, but it seems like it would be very hard to pump your pumps...
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Do not be troubled about the future, for it has not yet come;
Live life in the present, and make it so beautiful that it will be worth remembering.
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bluerussetboy
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154 lbs of downward force when you weigh 220 lbs really isn't problem for myself. or even a proper lever setup would help. might i suggest a gym membership :P

bluerussetboy runs past the nerd kicking sand in his face.
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Lentamentalisk
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its not strength per se... more that I weigh less than 154lbs
Do not look back, and grieve over the past, for it is gone;
Do not be troubled about the future, for it has not yet come;
Live life in the present, and make it so beautiful that it will be worth remembering.
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Hawkeye
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I'm getting my numbers based on measuring the psi attained with said pump. I weigh 170 so it really isn't that much trouble.
When someone runs they strike the ground with up to triple their body weight so a slight bounce at the bottom of the pump stroke can greatly ease the pumping.
I think you are trying to make it effortless when it really isn't that hard.
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