Terms in this set (34)
A structure or body that produces a useful reation to air movement.
An imaginary straight line from the leading edge to the trailing edge of an airfoil.
The wind felt by an 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
Angle bewteen the chord line of the airfoil and the relative wind. This can vary by the manipulation of the aircraft controls.
Angle of Incidence
The angle at which a wing is attched to the aircraft fuselage. The airplane pilot has no control over this angle.
Imaginary line from wing tip to wing tip for an airplane.
Rotation around the lateral axis. It's controlled by elevators and is used in descents and climbs.
The control of an airplane's pitching about the lateral axis.
An imaginary line from the nose to the tail.
Rotation around the longitudinal axis. This is controlled by ailerons.
The controlled rotation of the ailerons.
An imaginary line extending vertically through the intersection of the lateral and longitudinal axes.
Rotation around the vertical axis.
The rotation of the Yaw, which is controlled by the rudder.
Center of Gravity
The imaginary point where all weight is concentrated. The point at which an airplane would balance of it were suspended at that point.
Downward acting force which is overcome by the lift.
Rearward acting force which must be overcome by the thrust.
Forward acting force which overcomes the drag.
Upward acting force which overcomes the weight.
As the velocity of fluid (gas or liquid) increases, it's pressure decreases.
The resistance of the air produced by any part of an airplane that does not produce lift.
The by product of lift. It cause a rearward component of lift.
The inherent ability of an airplane to return, or not return, to its original flight condition after being disturbed by an outside force, such as rough air.
Positive Static Stability
The initial tendency of an aircraft to return or not return to its original position.
Positive Dynamic Stability
The tendency of an oscillating airplane (with positive static stability) to return to its original position relative to time.
The force (imposed stress) that must be supported by an airplane structure in flight.
Refers to the pull of gravity.
A force generated which acts towards the outside of the curve any time an airplane is flying a curved path (turns, climbs, or descents).
When turbulence over the upper wing surface decreases lift so drastically that flight can not be sustained.
Critical Angle of Attack
The angle at which a stall occurs.
Occurs when flying within one wingspan or less above the surface.
What an aircraft leave behind. Prop or jet blast, and wing-tip vortices.
When a wing is flown at a positive angle of attack, a pressure differential is created between the upper and lower wing surfaces, and the pressure above the wing will be lower than the pressure below the wing.
This is created when attempting to equalizes pressure, air moves outward, upward, and around the wing tip.
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