aerodynamicsFAA-published sample question (PAR, Aug 2021)
In what flight condition are torque effects more pronounced in a single-engine airplane?
A
Low airspeed, high power, high angle of attack.✓ Correct Answer
B
Low airspeed, low power, low angle of attack.
C
High airspeed, high power, high angle of attack.
Explanation
The left-turning tendencies grouped as 'torque' in PHAK Ch. 5 are strongest with high power, a high angle of attack and low airspeed, as on takeoff or in a climb. High power increases torque reaction and slipstream, a high angle of attack increases P-factor, and at low airspeed the rudder has less airflow to counter these effects. At low power and low angle of attack the effects are small, and at high airspeed the controls easily overpower them.
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