X-Mozilla-Keys:                                                                                 
Fredmoreno@aol.com wrote:

I have worked with pumps and fluid flow devices for years.  Most reliable
flow meter is a bucket, a scale, and a stop watch.  One never has a flow
meter with the right capacity, it seems.  A gallon weighs 8.33 pounds, and
there are 231 cubic inches in a gallon or 7.5 gallons per cubic foot.
Calculate the volume of the bucket or put it on a scale, flow water into it
for a known number of seconds, weigh the result (or calculate its volume) and
you have flow rate.

 For pump experiments, I suggest a garbage can filled with water for the
inlet, and a bucket at the outlet measuring the result.  These experiments
work best with a hose that allows you to put the bucket and the scale on the
driveway so you can dump the water since you will be doing it again and again
to get you data plots.  Figure at least 4 points across the flow rate range
at each RPM.  Wear galoshes.   :-)

Fred Moreno

 
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