POF - Straight and Level

The forces acting on an aircraft in straight and level flight are:

• Weight, Lift, Thrust, Drag, Slipstream

• Weight, Lift, Drag, Torque

• Weight, Lift, Thrust, Drag

• Weight, Lift, Thrust, Drag, Torque

The lift and weight forces form a couple:

• True. A nose down couple

• False

• True. A nose up couple

• Whats a couple

What forces create a nose up pitching moment?

• Thrust and weight

• Lift and Drag

• Lift and Thrust

• Thrust and Drag

What is the purpose of the tail plane

• Balance the passengers incase one is much heavier

• Balance residual rolling moments

• Balance residual pitching moments

• Hold the elevator on

In a low wing aircraft lowering flap will cause:

• The change in the thrust/drag and lift/weight couples both cause a nose down pitching moment

• The changes in the lift/weight couple causes a nose up pitching moment

• The change in the thrust/drag and lift/weight couples both cause a nose up pitching moment

• The changes in the thrust/drag couple cause a nose up pitching moment

Select all the correct statements regarding gear:

• Raising and lowering the gear will cause a nose up moment

• Raising and lowering the gear will cause a nose down moment

• Raising the gear will cause a nose up moment

• Raising the gear will cause a nose down moment

• Lowering the gear will cause a nose down moment

To maintain S&L flight, if the speed increases:

• The AoA must be increased

• S&L cannot be maintained if speed is increased

• The AoA must be decreased

• Flaps must be lowered

The power required formula can be simply said to be:

• Power = Thrust x TAS²

• Power = Drag/TAS

• Power = TAS/Thrust

• Power = TAS x Drag

Consider points A and B. Will the power required to maintain S&L flight be the same at both points.

• Yes because drag is the same

• No the power required will be greater at A

• No the power required at B will be greater

• Yes

Considering this power available vs power required graph:

• An increase in altitude would cause the Pr curve to move down. The Pa curve would move up.

• An increase in altitude would have no effect

• An increase in altitude will cause the Pr curve to move up and the Pa curve to move up

• An increase in altitude will cause the Pr curve to move up and the Pa curve to move down