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A part or surface, such as a wing, propeller blade, or rudder, whose shape and orientation control stability, direction, lift, thrust, or propulsion.
Angle of Attack
The acute angle between the direction of the relative wind and the chord of an airfoil.
The tail assembly of an aircraft, including the horizontal and vertical stabilizers, elevators, and rudder.
Control surfaces attached to the trailing edge of the wing extending outward from the fuselage to the midpoint of each wing. Flaps can increase the lifting efficiency of the wing and decrease stall speed.
The force that attracts a body toward the center of the earth or toward any other physical body having mass.
An airfoil (usually at the back of an airplane) that resists up and down changes in motion.
Newton's 1st Law
Objects at rest stay at rest and objects in motion stay in motion unless an external force is applied. It is known as the law of inertia.
Newton's 2nd Law
The relationship among an object's mass (m), acceleration (a), and an applied force (F), is Force equals mass times acceleration (F= ma).
An airfoil mounted on a revolving shaft. It creates low pressure in front of it, thereby moving an aircraft forward because of the high pressure area behind the propeller.
The means by which aircraft and spacecraft are moved forward. It is a combination of factors such as thrust (forward push), lift (upward push), drag (backward pull) and weight (downward pull).
An engine that can operate only when moving at high speed since it has no moving parts and no device for drawing in air.
Protrusions from the leading edge of a wing that, when combined with the flaps, result in a significant increase in lift.
A force applied to a body to propel it in a desired direction. The force which moves an aircraft through the air.
A vertically oriented airfoil at the back of an airplane that resists left and right movements.
The force generated by the gravitational attraction of the earth on the airplane. Lift must be equal to weight in order to sustain flight.
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