Pilot Institute

FEBRUARY 20, 2025

Adverse yaw is a side effect of aileron use, countered by rudder input. The rotational force thats needed to move an object about an axis is called torque. The simplest formula for torque is: Torque = F x L L is the distance between the object and the axis of rotation, also called the moment arm. What Is an Aileron?

Aileron 90

Aileron Weight-Shift-Control Rudder Longitudinal Axis 90

Pilot Institute

APRIL 12, 2025

The complication with helicopters is that the main rotor is driven by an engine that applies a twisting force (torque) to spin it. This is called torque reaction, and if its left unchecked, the helicopter fuselage will spin in the opposite direction of the main rotor. These rotors create equal and opposite torques that cancel out.

Lift 52

Lift Torque Thrust Aileron 52

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. An elegantly simple rope system inside the fuselage raises and lowers the Gweduck’s water rudder mounted inside the base of the main rudder (right).

Airplanes 77

Airplanes Rudder Knot Aileron 77