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Discussion

Match each instrument in List I with the quantity it indicates in List II.

List I

A. Attitude indicator

B. Directional gyro

C. Turn coordinator

D. Slip indicator

List II

1. Pitch and roll relative to the horizon

2. Heading held against a set reference

3. Rate of turn, with roll rate on entry

4. Whether the turn is balanced

Select the correct match.

  • A.A-4, B-2, C-3, D-1
  • B.A-1, B-2, C-3, D-4
  • C.A-2, B-1, C-3, D-4
  • D.A-1, B-3, C-2, D-4

Answer: B

Correct answer: A-1, B-2, C-3, D-4

Each instrument answers a different question. The attitude indicator gives pitch and roll relative to the horizon; the directional gyro holds a heading against a reference set from the compass.

The turn coordinator gives rate of turn, with roll rate showing on entry because of its canted gimbal. The slip indicator shows whether the turn is balanced. Three are gyroscopic and one is a ball in a tube - which is the distinction worth carrying through this topic.

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