Discussion
Assertion (A): The attitude indicator shows errors during turns and accelerations.
Reason (R): Its erection sensor responds to the resultant of gravity and any applied acceleration.
Select the correct answer from the options below.
Answer: D
Correct answer: Both A and R are true, and R is the correct explanation of A
Both are true and the second is the common cause of both errors. The erection system finds the vertical by pendulous means, and a pendulum aligns with the resultant of gravity and any applied acceleration.
Forward acceleration tilts that resultant aft, giving a false nose-up indication; a prolonged turn tilts it outward through centrifugal force, giving errors in bank and pitch. Erection is deliberately slow to limit both, which is why the errors are small and transient.
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