Descending flight with engine and propeller stopped.

The difference in angular settings [Angles of Attack] of the wings of a biplane or multiplane.

With respect to the operation of aircraft, the height at which point a decision must be made during an instrument approach to either continue the approach or to execute a missed approach [abort].

A triangularly-shaped aircraft wing having a low aspect ratio, a sharply-tapered leading edge, a straight trailing edge, and a pointed tip.

SEE RADIO NAVIGATION

A stall in the takeoff configuration with power.

The error of a Magnetic Compass due to inherent magnetic influences in the structure and equipment of an aircraft.

SEE AIR DEFENSE IDENTIFICATION ZONE

The acute angle, usually upward, between the wing of an airplane and a horizontal cross-section line. Opposite of ANHEDRAL.

A panel instrument providing a gyroscopic reading of an aircraft's compass heading.

Distance Measuring Equipment, a radio navigation device that determines an aircraft's distance from a given ground station, as well as its groundspeed and time to/from the station.

A lateral fin/rudder extension on the top of a fuselage.

The air deflected perpendicular to the direction of movement of an airfoil.

The resisting force exerted on an aircraft in its line of flight opposite in direction to its motion. Compare THRUST.

A wire designed to resist drag forces, usually running from a forward inboard point to an outboard aft point.

The angle between the heading of an aircraft and its Track, or flight path, over the ground as affected by winds.

The weight of an engine exclusive of any fuel, oil, and coolant.

Originally a tradename for a wrought aluminum-copper alloy created by Bausch Machine Tool Co, now fallen into generic use as any aluminum alloy containing 3.0-4.5% copper, 0.4-1.0% magnesium, and 0.1-0.7% manganese. Alcoa's version is commonly referred to as "Duraluminum," popularly used in aircaft manufacture.