On Mon, 07 Mar 2011 12:56 -0500, "Olin Lathrop" wrote:

> > lets say 8000 engine RPM
>=20
> OK.
>=20
> > I divide by 60 to get the frequency 8000/60=3D133.33
>=20
> Where to begin.  First 8000 RPM is a frequency.  Second, 133.33 is
> clearly
> not a frequency since frequency has units of 1/time.
>=20
> What you apparently mean is 133Hz.  Pay attention to details.  They
> matter.

I think you are being confusing. Both are frequency, one is "per minute"
and the other is "per second".

The only error he had was because the rotor runs half engine speed.

Cheers,

Bob

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