Flight Controls Flashcards
primary flight controls
ailerons, elevator, rudder
secondary flight controls
wing flaps, leading edge devices, spoilers, trim systems
a shape capable of producing lift
with relatively high efficiency
airfoil
a straight line joining the centers of curvature of the leading edge and trailing edges of an airfoil
chord line
distance between the leading edge and trailing edge measured along the chord line
chord
a line joining the leading edge and trailing edge of an airfoil, equidistant from the upper and lower surfaces
mean camber line
maximum distance of the mean camber line from the chord line
maximum camber
expressed as a percentage of chord, with its location as a percentage in tenths of the chord aft of the leading edge
maximum camber
When the camber line lies
above the chord line, it is said to have a ______.
positive camber
When the camber line is
below the chord line, it is said to have _______.
negative camber
A __________ has no camber because the chord line and camber line are co-incidental.
symmetrical airfoil
the maximum thickness or depth of an airfoil section expressed as a percentage of chord, with its location as a percentages of the chord aft of the leading edge
thickness/chord ratio
has a great influence on the airflow characteristics of airfoil section
thickness and thickness distribution
the radius of curvature of the leading edge
leading edge radius
Its size can significantly affect the initial airflow characteristics of the airfoil section.
leading-edge radius
