Oxford, Air Navigation
Gyroscopes: DGCA Air Navigation questions
Every attitude and heading instrument rests on two properties of a spinning rotor. Rigidity keeps its axis fixed in space, and precession makes it answer a push in an unexpected direction.
There are 9 questions, mostly definitions: what rigidity depends on, precession against rotor speed, topple and drift, real and apparent wander, degrees of freedom and electric rotors. DGCA exam sessions have set 2 of these.
Two pairs of terms get swapped. Topple is spin axis movement in the vertical plane, drift in the horizontal. For wander, ask whether the axis truly moved in space or the Earth turned beneath it. Here, degrees of freedom are counted about axes other than the spin axis.
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Question 1 of 5
Rigidity of a gyroscope depends on:
Question 2 of 5
A force is applied to deflect a gyroscope. If the rpm of the gyro is then doubled, the precession rate will:
Question 3 of 5
In gyroscopic theory the term topple is defined as:
Question 4 of 5
A force applied to the spinning axis of a rotor is precessed:
Question 5 of 5
Real wander of a gyro can be caused by:
4 more questions in this chapter
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