Aerodynamics app

When does a typical aircraft exhibit reduced longitudinal stability?. With the center of gravity (CG) near the aft limit. With the center of gravity (CG) near the forward limit. With the center of gravity (CG) at a midrange location.

Upon which factor does wing loading during a level coordinated turn in smooth air depend?. Rate of turn. Angle of bank. True airspeed.

Identify the type of stability if the aircraft attitude tends to return to its original position after the controls have been neutralized: Positive dynamic stability. Positive static stability. Neutral dynamic stability.

What is the safest and most efficient takeoff and initial climb procedure in a light, twin-engine airplane? Accelerate to: Best engine-out, rate-of-climb airspeed while on the ground, then lift off and climb at that speed. V (MC), then lift off at that speed and climb at maximum angle-of-climb airspeed. An airspeed slightly above V (MC), then lift off and climb at the best rate-of-climb airspeed.

What is the purpose of an anti-servo tab?. Move the flight controls in the event of manual reversion. Reduce control forces by deflecting in the proper direction to move a primary flight control. Prevent a control surface from moving to a full-deflection position due to aerodynamic forces.

By changing the angle of attack of a wing, the pilot can control the airplanes: Lift, gross weight, and drag. Lift, airspeed, and drag. Lift and airspeed, but not drag.

What is a purpose of flight spoilers?. Increase the camber of the wing. Reduce lift without decreasing airspeed. Direct airflow over the top of the wing at high angles of attack.

Which direction from the primary control surface does an elevator adiustable trim tab move when the control surface is moved?. Same direction. Opposite direction. Remains fixed for all positions.

What is the relationship of the rate of turn with the radius of turn with a constant angle of bank but increasing airspeed?. Rate will decrease and radius will increase. Rate will increase and radius will decrease. Rate and radius will increase.

For significant benefit, wing sweep must be at least: 30 to 35 degrees. 45 to 50 degrees. 55 degrees or more to substantially delay compressibility effects.

What adverse flight characteristics could result from operating an aircraft with the center of gravity (CG) beyond the published forward limitations?. The flight control forces may become very light. It could be difficult or impossible to flare for landing. It could be difficult or impossible to recover from a stall.

How can an airplane produce the same lift in ground effect as when out of ground effect?. The same angle of attack. A lower angle of attack. A higher angle of attack.

What is the movement of the center of pressure when the wingtips of a sweptwing airplane are shock-stalled first?. Inward and aft. Inward and forward. Outward and forward.

For a given angle of bank, the load factor imposed on both the aircraft and pilot in a coordinated constant-altitude turn: Increases with an increase in airspeed. Remains constant regardless of airspeed changes. Decreases with an increase in airspeed.

What could cause a turbine engine hot start?. Lack of airflow due to insufficient turbine RPM. Inlet and compressor airflow imbalance. Insufficient fuel in the combustion chamber.

What effect does extending leading edge slats have on an airplane's wing?. Increases the pitch up moment of an airfoil. Increases the camber and CL(MAX). Allows for earlier airflow separation.