Join Date: Jan 2003
Location: Maine Coast
Thanked 270 Times in 207 Posts
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Re: overpropped vs underpropped
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.
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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