Vertical Compass

The primary and most obvious advantage of the dry PAI-700 Vertical Card Magnetic Compass over the fluid compass is the Easy to Steer By presentation! With a glance at the Aero design lubber line on the lens, you see the complete 360^o dial in proper relation to your aircraft heading, or the reciprocal thereof, presented the way you think. The Directional Gyros and ADF Indicators were the first to utilize this type of presentation; now the PAI-700 Vertical Card Magnetic Compass does! Columbus never had it so good!

In a fluid compass, the sensing magnets, with dial card attached, are a balanced and pendulous assembly sitting on a pivot point in a cup jewel. Although the compass is filled with fluid to act as a damper, this design is extremely unstable in turbulence and reacts to any aircraft movement. When you level flight your aircraft, you must wait for the pendulosity of the sensing magnet assembly to overcome the actions and reactions of the other forces present to level the dial card before taking a reading, generally an averaged reading.

The PAI-700 Vertical Card Magnetic Compass utilizes a sensing magnet which is NOT pendulous! It is free to rotate only in a fixed horizontal plane in relation to the compass housing, hence the aircraft. When you level flight your aircraft, take a reading!

Another advantage of the PAI-700 Vertical Card Magnetic Compass is its inherent stability. A contributing factor to this stability is the utilization of eddy current damping which is a natural phenomenon aided by the basic design. Overswing is greatly minimized or eliminated.

While, as in any magnetic compass, the PAI-700 Vertical Card Magnetic Compass will be subject to lead, lag, turn error, acceleration error, etc., the actions and reactions of the PAI-700 Vertical Card Magnetic Compass will be reduced due to the absence of pendulosity.

The PAI-700 Vertical Card Magnetic Compass comes with the customer’s choice of lighting: 5 volt, 14 volt, or 28 volt.

The PAI-700 Vertical Card Magnetic Compass is manufactured exclusively by Precision Aviation, Inc. under authorization by the U.S. Department of Transportation, Federal Aviation Administration, citing FAR-21 and TSO C7c Type 1, Direction Instrument, Magnetic, Non-Stabilized Type.

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