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#25
June 21st 07, 04:07 PM
posted to rec.aviation.homebuilt
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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 
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