9 Quiz CONTROLS

You are commencing your take-off roll on runway 03 with a northerly wind at 22 knots. Ignoring other potential sources of yaw, which rudder pedal do you need to press in order to keep aligned with the runway centerline?

• Left rudder pedal
• Neither - use of aileron will be sufficient to maintain the centreline
• Right rudder pedal
• Neither - differential braking is used to control this on take-off

When an aeroplane wing’s angle of attack is increased, downwash causes the horizontal tailplane to experience…

• an initial lower angle of attack which then increases.
• a lower increase in angle of attack.
• the same increase in angle of attack.
• a higher increase in angle of attack.

The use of ailerons induces adverse (aileron) yaw. This occurs as a result of the…

• up-going wing producing more drag than the down-going wing.
• down-going wing producing more drag than the up-going wing.
• up-going wing being subjected to more aerodynamic damping than the down-going wing.
• up-going wing having a higher rate of roll when compared to the down-going wing.

In general, control forces are reduced by:

• a servo tab, spring tab and mass balancing.
• a balance tab, forward shift of the CG and a servo tab.
• a horn balance, servo tab and spring tab.
• mass balancing, a trim tab and spring tab.

A horn balance in a control system has the following purpose:

• to decrease the static longitudinal stability of the aeroplane.
• to prevent flutter.
• to obtain mass balancing.
• to decrease stick forces.

Which statement is correct? I. On fully hydraulic powered flight controls there is no need for mass balancing. II. On fully hydraulic powered flight controls there is no need for trim tabs.

• I is correct, II is correct.
• I is correct, II is incorrect.
• I is incorrect, II is correct.
• I is incorrect, II is incorrect

Q feel systems need inputs from:

• Pitot and static pressures
• Ambient and dynamic pressures
• Dynamic and static pressures
• Pitot and dynamic pressures

In straight flight, as speed is increased, whilst trimming to keep the stick force zero:

• the elevator is deflected further downwards and the trim tab further upwards.
• the elevator is deflected further upwards and the trim tab further downwards.
• both elevator and trim tab are deflected further downwards.
• the elevator and trim tab do not move.

When a jet transport aeroplane takes off with the CG at the aft limit and the trimmable horizontal stabiliser (THS) is positioned at the maximum allowable nose up position for take-off:

• there will be a tendency to under-rotate.
• rotation will require higher than normal stick force.
• rotation will be normal using the normal rotation technique.
• early nose wheel raising will take place.

Aileron reversal can occur at…

• at high speeds, when the wing with the down-going aileron twists. reducing that wing's Lift Coefficient.
• low speeds when wing with the up-going aileron exceeds that wing’s critical Angle Of Attack.
• high speeds when the wing with the up-going aileron causes sufficient drag, leading to adverse yaw.
• low speeds when the wing with the down-going aileron twists, increasing that wing’s camber.