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Old June 21st 07, 04:07 PM posted to rec.aviation.homebuilt
GeorgeB
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Posts: 42
Default Air Compressor Horsepower/Wattage/Amperage

On Wed, 20 Jun 2007 14:17:58 -0700, "RST Engineering"
wrote:

Lessee now, lets go to the 100% (one horse) column and we find at 115 volts
a PF of 79, 66% efficiency, and 15.4 line amps.


I think you slipped a column ...

100% 13.4A (115V), 0.66 eff, 0.72 PF ... 732 watts

One horse is 750 watts and
at the one horse level this rascal is sucking 1770 watts, or an efficiency
of 42%. But the table shows a 66% efficiency. Hmmm ... cos (79°) = .2 but
that factor of out of phase isn't going to get me into the ballpark, nor is
the sin at .98 going to get me anywhere either.

Hmmmm ...

Jim