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Re: Compressors, 110/220vac, misc

Subject: Re: Compressors, 110/220vac, misc
From: "W. R. Gibbons" <>
Date: Mon, 1 Jul 1996 11:16:14 -0400 (EDT)
On Sat, 29 Jun 1996 wrote:

> Now for the other thing I was just reminded of by a ad for a sears 5HP
> oil-less compressor:
> many of the compressor companies (starting w/ campbell-hausfeld) use a
> different rating system for motor horsepower than used to be "standard": they
> give "input" horsepower, not what the motor puts out.  AC induction motors
> are around 50% efficient, so a "5HP" motor (That draws 15a@220v or 30A@115v)

It figures.  I was attracted by a low price on a new Sears 5 HP 
compressor.  I wrote down the cfm ratings at 40 and 90 psi, and found 
they were only slightly higher than the ratings on my old Sears 2 HP 

   Ray Gibbons  Dept. of Molecular Physiology & Biophysics
                Univ. of Vermont College of Medicine, Burlington, VT
        (802) 656-8910

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