Thread: Archimedes screw throttle
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Old 08-27-2008, 12:42 AM   #20 (permalink)
johnmyster
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Quote:
Originally Posted by dcb View Post
imagining a 1" square piston in a suitable "cylinder", it can lift 20 lbs
20 inches of mercury isn't anything close to 20 psi. 20 inches is (ballpark) 2/3 of an atmosphere, so roughly 10 psi.
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