PRIVATE PILOT EXAM - ASA CHAPTER 1
BASIC AERODYNAMICS QUESTIONS &
ANSWERS
/. Airfoil - Answer-is a structure or body which produces a useful reaction to air
movement. Airplane wings, helicopter rotor blades and propellers are airfoils.
/.Chord Line - Answer-is an imaginary straight line from the leading edge to the trailing
edge of an airfoil. Changing the shape of an airfoil will change the chord line
/.relative wind - Answer-is the wind relative to the airfoil. it is created by the movement
of air past an airfoil, by the motion of an airfoil through the air, or by a combination of the
two.
/.angle of attack - Answer-is the angle between the chord line of the airfoil and the
relative wind. By manipulating the aircraft controls, the pilot can vary the angle of attack
/.angle of incidence - Answer-is the angle at which a wing is attached to the aircraft
fuselage. The airplane pilot has not control of the angle of incidence
/.lateral axis - Answer-is an imaginary line from wingtip to wingtip for an airplane
/.pitch - Answer-is the rotation around the lateral axis, and is controlled by the airplane's
elevators, or by pushing the yoke forward or pulling it backwards
/.longitudinal control or longitudinal stability - Answer-is the rotation along the lateral
axis, or pitch
/.longitudinal axis - Answer-is an imaginary line from the nose to the tail of the airplane.
/.Roll - Answer-is the rotation around the longitudinal axis and is controlled by use of the
ailerons
/.lateral control or lateral stability - Answer-is the rotation along the longitudinal axis
/.Vertical axis - Answer-is an imaginary line extending vertically through the intersection
of the lateral and longitudinal axes
/.Yaw - Answer-is the rotation around the vertical axis and is controlled by the rudder
BASIC AERODYNAMICS QUESTIONS &
ANSWERS
/. Airfoil - Answer-is a structure or body which produces a useful reaction to air
movement. Airplane wings, helicopter rotor blades and propellers are airfoils.
/.Chord Line - Answer-is an imaginary straight line from the leading edge to the trailing
edge of an airfoil. Changing the shape of an airfoil will change the chord line
/.relative wind - Answer-is the wind relative to the airfoil. it is created by the movement
of air past an airfoil, by the motion of an airfoil through the air, or by a combination of the
two.
/.angle of attack - Answer-is the angle between the chord line of the airfoil and the
relative wind. By manipulating the aircraft controls, the pilot can vary the angle of attack
/.angle of incidence - Answer-is the angle at which a wing is attached to the aircraft
fuselage. The airplane pilot has not control of the angle of incidence
/.lateral axis - Answer-is an imaginary line from wingtip to wingtip for an airplane
/.pitch - Answer-is the rotation around the lateral axis, and is controlled by the airplane's
elevators, or by pushing the yoke forward or pulling it backwards
/.longitudinal control or longitudinal stability - Answer-is the rotation along the lateral
axis, or pitch
/.longitudinal axis - Answer-is an imaginary line from the nose to the tail of the airplane.
/.Roll - Answer-is the rotation around the longitudinal axis and is controlled by use of the
ailerons
/.lateral control or lateral stability - Answer-is the rotation along the longitudinal axis
/.Vertical axis - Answer-is an imaginary line extending vertically through the intersection
of the lateral and longitudinal axes
/.Yaw - Answer-is the rotation around the vertical axis and is controlled by the rudder
