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Instrument Rating Study Guide
Covers ground school topics right out the Jeppesen Guided Flight Discovery textbook.
12
Aviation
04/02/2013

Term
 Rigidity in space
Definition
 The principle that a wheel with a heavily weighted rim spun at high speeds tends to remain fixed in the plane in which it is spinning.
Term
 What are the three gyroscopic instruments?
Definition
 The attitude indicator, heading indicator, and turn coordinator.
Term
 Precession
Definition
 When an outside force tries to tilt a spinning gyro, the gyro responds as if the force had been applied at a point 90 degrees further around in the direction of rotation.
Term
 Instrument tumbling
Definition
 When the gimbals of older indicators hit their limits, the gyros precess rapidly, or tumble from their plane of rotation.
Term
 Standard rate turn
Definition
 3 degrees per second.
Term
 Basic formula for determining the required bank for a standard rate turn.
Definition
 Angle of bank= [True airspeed in knots / 10] + 5
Term
 Inclinometer
Definition
 The part of the turn coordinator that contains the fluid and ball.
Term
 Slip
Definition
 When the rate of turn is too slow for the angle of bank.
Term
 Skid
Definition
 When the rate of turn is too great for the angle of bank.
Term
 Variation
Definition
 The angular difference between true and magnetic north.
Term
 Deviation
Definition
 Errors due to magnetic interference with metal components in the aircraft, as well as magnetic fields from aircraft electrical equipment.
Term
 Magnetic dip
Definition
 Magnetic dip exists because the magnet in the compass tries to point three dimensionally toward the earth's magnetic north pole, which is at a point deep inside the earth. Magnetic dip is responsible for errors during turns and acceleration.
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