Section 1 - Aerodynamic Principles

An airplane said to be inherently stable

• will not spin
• is difficult to stall
• requires less effort to control

What determines the longitudinal stability of an airplane?

• The location of the CG with respect to the center of lift
• The effectiveness of the horizontal stabilizer, rudder, and rudder trim tab
• The relationship of thrust and lift to weight and drag

What is the direct cause a stall?

• Exceeding the critical angle of attack
• Flying below the minimum required airspeed
• Flying with the aircraft overloaded
• All of the above

In what flight condition are the torque effects more pronounced in a single-engine airplane?

• Low airspeed, high power, high angle of attack
• Low airspeed , low power, low angle of attack
• High airspeed, high power, high angle of attack

The left-turning tendency of an airplane caused by P-factor is the result of the

• clockwise rotation of the engine and the propeller turning the airplane counter-clockwise
• propeller blade descending on the right, producing more thrust than the ascending blade on the left
• gyroscopic forces applied to the rotating acting 90 degrees in advance of the point the force was applied

If an airplane weighs 2,300 pounds, what approximate weight would the airplane structure be required to support during a 60 degree banked turn while maintaining altitude?

• 2,300 pounds
• 3,400 pounds
• 4,600 pounds

If an airplane weighs 3,300 pounds, what approximate weight would the airplane structure be required t support during a 30 degree banked turn while maintaining altitude?

• 1,200 pounds
• 3,100 pounds
• 3,800 pounds

If an airplane weighs 4,500 pounds, what approximate weight would the airplane structure be required to support during a 45 degree banked turn while maintaining altitude?

• 4,500 pounds
• 6,400 pounds
• 7,200 pounds

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

• position of the CG
• speed of the airplane
• abruptness at which the load is applied

What force makes an airplane turn?

• The horizontal component of lift
• The vertical component of lift
• Centrifugal force