ch3 aerodynamics pt2

What is the relationship of lift, drag, thrust, and weight when the airplane is in straight-and-level flight?

• lift=weight, thrust=drag

• lift+weight = thrust+drag

• lift=thrust, weight=drag

What must a pilot be aware of as a result of ground effect?

• • Wingtip vortices increase creating wake turbulence problems for arriving and departing aircraft.

• • Induced drag decreases; therefore, any excess speed at the point of flare may cause considerable floating.

• • A full stall landing will require less up elevator deflection than would a full stall when done free of ground effect.

When are the four forces that act on an airplane in equilibrium?

• during unaccelerated flight

• during high accelerated flight

• when airplane is at rest on the ground

Wingtip vortices created by large aircraft tend to

• sink below the aircraft generating turbulence

• rise into the traffic pattern

• rise into the takeoff or landing path of a crossing runway

What is the purpose of the rudder on an airplane?

• To control roll

• To control overbanking tendency

• To control yaw

Wingtip vortices are created only when an aircraft is

• operating at high airspeeds

• developing lift

• heavily loaded

What force makes an airplane turn?

• The horizontal component of lift

• Centrifugal force

• The vertical component of lift

The greatest vortex strength occurs when the generating aircraft is

• heavy, dirty, and fast

• heavy, clean, and slow

• light, dirty, and fast

What is one purpose of wing flaps?

• To decrease wing area to vary the lift

• To relieve the pilot of maintaining continuous pressure on the controls

• To enable the pilot to make steeper approaches to a landing without increasing the airspeed

When landing behind a large aircraft, the pilot should avoid wake turbulence by staying

• below the large aircraft's final approach path and landing before the large aircraft's touchdown point

• above the large aircraft's final approach path and landing before the large aircraft's touchdown point

• above the large aircraft's final approach path and landing beyond the large aircraft's touchdown point