"Tim Ward" wrote in message
...

"Tarver Engineering" wrote in message
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"richard riley" wrote in message
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On Wed, 11 Feb 2004 12:28:32 -0800, Jim Weir wrote:

:I love it when people without a clue jump on your questions that you
asked me.
:
:It can be done. I'm not sure how trivial the mod would be, but if
you
are
:talking about powering 115v/400Hz. gyros, as I recall you will need
three
phase.

Most of the 115v/400 hz gyros out there are 3 phase, but not all. I
have one that isn't - it's not working and it's not worth rebuilding.
I'd guess 90% or more are three phase.

Most airplane instrumentation is devided by phase, gyros being one of
the
most critical pieces of instrumentation for IFR operations.

Mechanical INS are three phase, but they have battery back up.

Cool! Where do they get those 3-phase batteries?

Perhaps weir can provide you with a schematic for a three phase batter
charger.