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From: "Marvin Kaye" <marv@lancaironline.net>
Subject: Re: [FlyRotary] Re: Water_pump Curves
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Date: Mon, 18 Nov 2002 22:30:24 -0500
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Posted for Charlie and Tupper England <cengland@netdoor.com>:


>With regards to the power input. The motor was an electric 1-HP motor 
>from my table saw. It is a synchronous motor, that tries to always run 
>at 3450 rpm. To vary the speed of the pump, I varied the pulley 
>diameter. the motor will run at 3450 rpm at no load, and continue with 
>only small variations up until you exceed its ability. I don't think 
>that I was anywhere close to causing major slippage. The current the 
>motor draws varies with the load.

Bill,

It would be useful to know the current & voltage feeding the motor during the 
tests. I think I have an inexpensive clamp on ammeter. If you're interested, 
email me your mailing address & I'll be happy to loan it to you so we can see 
some actual power-required numbers for the pump.

Charlie England

cengland@netdoor.com