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> Just got a CH 60 gallon upright. 7HP (so they say).
This is the least reliable specification. A more accurate horsepower 
rating could be calculated by taking the steady-state ampere rating from 
the motor plate. Volts time amps gives you watts, and a conversion table 
(mine's not handy) gives you horsepower. My recollection is that there 
are 700-odd watts to the horsepower.
Most electric compressors produce around four cfm (cubic feet per 
minute) per horsepower, usually measured at around 80 or 90 psi.
- Bill Rabel
   Wet Spot Garage
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