05 Flight - Trimming Controls

The purpose of a trim tab is:

• To assist the pilot in initiating movement of the controls.

• To zero the load on the pilots controls in the flight attitude required.

• To provide feel to the controls at high speed.

• To increase the effectiveness of the controls.

A control surface may be mass balanced by:

• Fitting a balance tab.

• Attaching a weight acting forward of the hinge line.

• Fitting an anti-balance tab.

• Attaching a weight acting aft of the hinge line.

An aircraft has a tendency to fly right wing low with hands off. It is trimmed with a tab on the left aileron. The trim tab will:

• Move up, causing the left aileron to move up and right aileron to move down.

• Move down, causing the left aileron to move up, right aileron remains neutral.

• Move down causing the left aileron to move up, and right aileron to move down.

• Move up causing the left wing to move down, ailerons remain neutral.

The phenomenon of flutter is described as:

• Rapid oscillatory motion involving only rotation of the control surfaces, associated with the shock waves produced around the control surfaces.

• Oscillatory motion of part or parts of the aircraft relative to the remainder of the structure.

• Rapid movement of the airframe caused by vibration from the engines.

• Reversal of the ailerons caused by wing torsional flexibility.

The purpose of a differential ailerons is to:

• Increase the yawing moment which opposes a turn.

• Reduce the opposite yawing moment when making a turn.

• Induce a pitching moment to prevent the nose from dropping in the turn.

• Improve the rate of roll.

Which flying control surface(s) give(s) longitudinal control?

• The rudder.

• The ailerons.

• The elevator.

• The flaps.

Yawing is a rotation about:

• The normal axis controlled by the rudder.

• The lateral axis controlled by the rudder.

• The longitudinal axis controlled by the ailerons.

• The normal axis controlled by the elevator.

To trim an aircraft which tends to fly nose heavy with hands off, the top of the elevator trim wheel should be:

• Moved forward to raise the nose and this would cause the elevator trim tab to move down, and the elevator to move up.

• Moved backwards to raise the nose, and this would cause the elevator trim tab to move down, and the elevator to move up.

• Moved backwards to raise the nose, and this would cause the elevator trim tab to move up, and the elevator to move up.

• Moved backwards to raise the nose, and this would cause the elevator trim tab to move up and cause the nose to rise.

The primary and secondary effects of applying the left rudder alone are:

• Left yaw and left roll.

• Left yaw and right roll.

• Right yaw and left roll.

• Right yaw and right roll.

The respective primary and secondary effects of the rudder control are:

• Yaw and pitch.

• Pitch and yaw

• Roll and yaw.

• Yaw and roll.