It's almost certainly part of the flight stability / autopilot system,
as suggested privately by another time-nut.
The gyros spin up nicely and run quietly, so sounds like the bearings
are fine.
I was using an old Yamaha amplifier I had around for the 400Hz drive. I
think I'm going to go the audio amp route. The biggest problem I'm
having with replacing it is that I haven't found a small amp yet that
has enough output voltage. I'm going to breadboard up something tonight
- simple phase-shift oscillator driving a pair of FETs in class B
configuration with a low-pass filter to clean things up. It actually
doesn't have to be all that clean. The gyros are electromechanical
devices after all, they're just little split-phase AC motors.
As for what I'm going to do with it, why, the same thing we do with our
time and frequency related projects - play with it. :) My goal is to get
the electronics package fully functional. Fortunately, everything is
analog using transistors you can actually see and quad 741 op-amps in
real dip packages, and even better, only double-sided pc boards.
On 03/27/2013 11:16 PM, [email protected] wrote:
Is this part of an HSI (horizontal situation indicator), ADI (attitude
director indicator), INS (inertial navigation system), or autopilot? Are
the bearings dust?
Sounds like fun to play with though. What do you plan to do with it?
--
Bill Ezell
----
They said 'Windows or better'
so I used Linux.
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