If it was smaller and lighter, would these work as a crank pump??
http://en.wikipedia.org/wiki/Archimedes_screw
Archimedes Screw, New Crank Pump?
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Re: Archimedes Screw, New Crank Pump?
I guess it could be made to work, though I don't really see any advantages over the traditional pump.
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Re: Archimedes Screw, New Crank Pump?
Less force. Also, If you were to use it via stream/river, it could be a stream QFD. I don't know yet.
Re: Archimedes Screw, New Crank Pump?
While good for lifting water up slopes, since the screw is, in a sense, an open channel, if you try pressurizing a PC with is, you'll eventually end up just pushing water back down through the screw towards the lower-pressure reservoir. I don't believe one can really get that sort of system to build up the pressure needed to create a good stream.
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Re: Archimedes Screw, New Crank Pump?
Took the words out of my mouth. Gravity just won't make enough pressure, I'm afraid.
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