CPAER General Knowledge - Sharper Edge
Questions and Answers Verified
Chord - ANSWER Straight line joining leading edge to the trailing edge
Camber line - ANSWER Line which runs midway between upper and lower surfaces of
the airfoil joint the trailing and leading edge.
Camber - ANSWER The measure of the curvature of the airfoil.
Expressed as a percentage
Angle of attack - ANSWER The angle between the chord of the wing and the relative
airflow
Centre of pressure - ANSWER Lift and drag act through the centre of pressure of the
wing. The centre of pressure moves with a change in the angle of attack.
Centre of gravity - ANSWER The point through which the resultant of the weight of all of
the components on the aircraft can be considered to act.
The centre of ____ is ahead of the centre of _____. - ANSWER Gravity, pressure.
Axes of rotation - ANSWER Three axes which rotate about the aircrafts centre of gravity
Lateral axis associated with... - ANSWER Pitch
, Longitudinal axis associated with... - ANSWER Roll
Vertical axis associated with.... - ANSWER Yaw
Lift acts... - ANSWER Perpendicular to relative airflow
Weight acts... - ANSWER Towards the centre of earth (gravity)
Thrust acts... - ANSWER Along the longitudinal axis in the direction of motion
Drag acts... - ANSWER Parallel to relative airflow
Aspect ratio - ANSWER The measure of the slenderness of a wing.
The ratio of the wing span to the wing chord.
Wings with a ___ aspect ratio are more efficient and aerodynamic. Why? - ANSWER
High because they produce less induced drag.
Laminar flow wings - ANSWER Keep the airflow laminar much further back along the
wing reducing drag.
Maximum thickness of the wing occurs much further back.
Disadvantage of laminar flow wings? - ANSWER Abrupt stall behaviour
Questions and Answers Verified
Chord - ANSWER Straight line joining leading edge to the trailing edge
Camber line - ANSWER Line which runs midway between upper and lower surfaces of
the airfoil joint the trailing and leading edge.
Camber - ANSWER The measure of the curvature of the airfoil.
Expressed as a percentage
Angle of attack - ANSWER The angle between the chord of the wing and the relative
airflow
Centre of pressure - ANSWER Lift and drag act through the centre of pressure of the
wing. The centre of pressure moves with a change in the angle of attack.
Centre of gravity - ANSWER The point through which the resultant of the weight of all of
the components on the aircraft can be considered to act.
The centre of ____ is ahead of the centre of _____. - ANSWER Gravity, pressure.
Axes of rotation - ANSWER Three axes which rotate about the aircrafts centre of gravity
Lateral axis associated with... - ANSWER Pitch
, Longitudinal axis associated with... - ANSWER Roll
Vertical axis associated with.... - ANSWER Yaw
Lift acts... - ANSWER Perpendicular to relative airflow
Weight acts... - ANSWER Towards the centre of earth (gravity)
Thrust acts... - ANSWER Along the longitudinal axis in the direction of motion
Drag acts... - ANSWER Parallel to relative airflow
Aspect ratio - ANSWER The measure of the slenderness of a wing.
The ratio of the wing span to the wing chord.
Wings with a ___ aspect ratio are more efficient and aerodynamic. Why? - ANSWER
High because they produce less induced drag.
Laminar flow wings - ANSWER Keep the airflow laminar much further back along the
wing reducing drag.
Maximum thickness of the wing occurs much further back.
Disadvantage of laminar flow wings? - ANSWER Abrupt stall behaviour
