Drag Horizontal Stabilizer Torque 
Pilot Institute
OCTOBER 12, 2024
The turbulent air hits the horizontal stabilizer, which causes a vibration that can be felt throughout the aircraft. Watch out for torque effect (especially if you are in high-powered aircraft) since the increase in power can cause the nose to yaw to the left. While takeoff flaps improve performance, they also add unwanted drag.
Plane and Pilot
OCTOBER 3, 2024
Another advantage of the counter-rotating props is the elimination of torque roll. This is the tendency to dig in the left tip float during takeoff while countering engine torque. The airfoil is a Harry Riblett shape, giving modernized flow separation on the leading edge for a soft stall yet with good lift and drag performance.
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