Chapter 3

Changes in the center of pressure of a wing affect the aircrafts?

Aerodynamic balance and controllability.

Which statement relates to bernoulli's principle?

Air travels faster over the curved upper surface of an airfoil causes lower pressure on the top surface.

Ground effect is most likely to result in which problem?

Becoming airborne before reaching recommended takeoff speed.

During a spin to the left, which wing(s) are stalled?

Both wings are stalled.

An airplane has been loaded in such a manner that the CG is located aft CG limit. One undesirable flight characteristic a pilot might experience im with this airplane would be?

Difficulty in recovering a stall.

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

During unaccelerated flight.

One of the main functions of flaps during approach and landing is to?

Increase angle if descent without increasing the airspeed.

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

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

Loading an airplane to the most aft CG will cause the airplane to be?

Less stable at all speeds.

Floating caused by the phenomenon of ground effect will be most realized during an approach to land when at?

Less than the length of the wingspan above the surface.

The four forces acting on an airplane in flight are?

Lift, weight, thrust, and drag.

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

Lift=weight and thrust=drag.

In what flight condition is torque effect the greatest in a single engine airplane?

Low airspeed, high power, and high angle of attack.

The left turning tendency of an airplane caused by p factor is the result of the?

Propeller blade descending in the right producing more thrust than the ascending blade on the left.

The angle of attack at which an airplane wing stalls will?

Remain the same regardless of gross weight.

An airplane said to be inherently stable will?

Require less effort to control.

The amount of excess load that can be imposed on the wing of an airplane depends upon the?

Speed of the airplane.

During approach to a stall an increased load factor will cause the airplane to?

Stall at a higher airspeed.

In what flight condition must an aircraft be placed in order to spin?

Stalled.

What are the four flight fundamentals involved in maneuvering an aircraft?

Straight and level flight, turns, climbs, and descents.

Angle of attack

The angle between the chord line and the relative wind.

What causes an airplane (except a T tail) to pitch nose down when power is reduced and controls are not adjusted?

The downwash on the elevators from the propeller slipstream is reduced and elevator effectiveness is reduced.

What force makes the airplane turn?

The horizontal component of lift.

What determines the longitudinal stability of an airplane?

The location of the CG with respect to the corner of lift.

Ground effect

The result of the interference of the surface of the earth with the airflow patterns about an airplane.

Which basic flight maneuver increases the load factor in an airplane as compared to straight and level flight?

Turns.

When does p factor cause the airplane to yaw to the left?

When at high angles of attack.