Discussion
Assertion (A): T-tailed aircraft with rear-fuselage engines are commonly fitted with stick pushers.
Reason (R): At extreme angles of attack the wing and nacelle wakes can blanket a fin-mounted tailplane.
Select the correct answer from the options below.
Answer: A
Correct answer: Both A and R are true, and R is the correct explanation of A
Both are true and the reason is the hazard the pusher guards against. At extreme angle of attack the wing wake rises and, with rear-fuselage nacelles adding their own disturbance, can blanket a fin-mounted tailplane.
The elevator then lacks the authority to lower the nose, and the stall becomes self-sustaining. Because recovery may be impossible, certification for such configurations turns on prevention: a stick shaker to warn and a stick pusher to force the nose down before the critical angle is reached.
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