[Milsurplus] Hig frequency power

[J. Forster]

There is a good reason for higher frequencies in Gyros. Generally you want the
rotor to spin very fast to maximize the rotor's angular momentum.. You cannot
get an AC motor to run faster than synchronous speed, 3600 RPM for 60 Hz; 24,000
RPM for 400 Hz. Hence the higher operating frequency,
-John



William Donzelli wrote:

> > I once had a power control unit which said it was designed for 1600 Hz
> > and was 3 phase, but I have no idea where it was used.  Always
> > wondered about that.
>
> Perhaps a gyrocompass? Sometimes thay use really odd line frequencies
> (Armas used 233 Hz, I think some Sperrys 240 Hz). Like most things gyro,
> there is probably a perfectly valid reason for using these, known by four
> people in the whole world (and only two of them understand why).
>
> William Donzelli
> aw288 at osfn.org