Straight and Level & Curves Flashcards
What happens when power is increased during straight and level flight?
When the power is increased during S&L, the airspeed will increase, resulting in more lift being produced. To Remain in equilibrium (in S&L) at the fast speed, the nose must be lowered.
What happens when flap is lowered on a high wing aircraft?
On a high wing aircraft, lowering flap will increase the dragline, which is situated below the thrust line. This will result in a nose pitch up. Due to the increase in lift due to flap being lowered, the aircraft will also balloon.
What does Power + Attitude = Performance
To maintain straight and level performance, an increase in power means that attitude must be decreased.
Conversely, if power is reduced, an increase in attitude must occur to remain in level flight.
L= IAS x AOA
Explain the difference between thrust and power?
Thrust is a force generated by the propeller disk accelerating air rearwards. Thrust will be at its greatest when the aircraft is at rest, as the thrust available will be at its maximum.
Power is the rate at which work is done. It takes velocity into account.
What is the equation for Power Required?
Power Required = Thrust req (drag) x TAS
What happens to power available and Thrust with increasing TAS?
Thrust available will decrease as TAS is increased, as the engine is less able to accelerate air rearwards with increasing velocity.
Power available will increase slightly, due to greater efficiencies such as lower exhaust pressures and RAM air.
What is the effect of increasing weight on power required and power available
Increasing weight will move the power required curve move upwards and slightly to the right.
The minimum level flight speed/stall speed will in increased. The maximum level flight speed will also be slightly reduced. This is because a higher AOA is needed to generate sufficient lift. Therefore drag is also increased. Pr = TAS x Drag.
What is the effect of increasing altitude on power required and power available?
Power available decreases due to the decrease in air density.
Power required will increase as PR= TAS x Drag, and TAS will increase with altitude.
