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post #35 of Old 12-18-2012
Maine Sail
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Re: overpropped vs underpropped

Originally Posted by Oaksail View Post
Hi TQA, I can't scan my text books but this might work

Try this link Downloads & CDs
You can get to it through ITT Bell & Gossett website, click on "Online Calculators" scroll down and click on 'Flow / Head - Variable Speed Pumping Wizard" and try it out.

Start at 5 gpm at 10 ft of head and then look at what happens to flow at different speeds. Directly proportional.

Try 5000 gpm at 10, 100, or a 1000 ft of head.
Directly proportional.

I test small pumps and i test BIG pumps. I test them at different speeds.

This is very easy to see with centrifugal bilge pumps. Drop the voltage and the output is also cut. It can be pretty dramatic...

-Maine Sail / CS-36T

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