----- Original Message -----
Sent: Wednesday, April 02, 2008 12:09
PM
Subject: Re: [PSUBS-MAILIST] Gyro
Compass
Hi Dan,
I really do not have a good source for an
electrical gyro. I have in the past purchased items from Wag-aero with good
success. They have rebuilt items but they are still $600-700.
I also found a couple used on ebay, but they are
also vacuum driven.
I have some friends at the airport who might have
an idea and I will check into it. more.
I did talk to one friend who had good luck with
wentworth aircraft as salvage yard. I think they are in
minnesota.
If I learn more I will let you know.
Best Regards,
Jim K
----- Original Message -----
Sent: Wednesday, April 02, 2008 7:15
AM
Subject: [PSUBS-MAILIST] Gyro
Compass
I'm looking for help.
Aviation guys and surplus hunters!
I've been playing around with a vacuum powered
gyro compass to install in my sub. The compass works great but the
vacuum pump has it's problems.
I rigged a vacuum pump to a 12VDC motor to try
it. For continuous use, the motor needs to be large to supply
sufficient vacuum. It's a continuous 12amp draw. The pump is
also noisy, although much of that can be dampened by creating a continuous
loop with a return air line and sound abatement padding. Also, the
bulky pump unit is cumbersome in a tight sub.
The solution is a electrical driven
compass. From my understanding, they are replacing the older vacuum
units in small aircraft. I'm told they are available, aircraft
certified, for around $1200. That's to steep for the small amount of
time I will actually use it, and I sure don't need it
certified.
I was wondering if anyone out there can
point me to a source for yellow tagged or red tagged units that will
still operate, and at a better price then a new one. If
It could keep a heading within 30 degrees for twenty minutes, it's all
I need and would be far better then the magnetic compass I have
now.
Thanks, Dan H.
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