light annunciator
51Cruciform tail — BAe Jetstream 31 with cruciform tail The cruciform tail is an aircraft empennage configuration which, when viewed from the aircraft s front or rear, looks much like a cross. The usual arrangement is to have the horizontal stabilizer intersect the …
52NACA cowling — Curtiss AT 5A Hawk with NACA cowling at the Langley Memorial Aeronautical Laboratory, October 1928 …
53Panel switch — The panel switching system was an early type of automatic telephone exchange, first put into urban service by the Bell System in the 1920s and removed during the 1970s. The Panel and Rotary systems were developed in parallel by Bell Labs before… …
54Course Deviation Indicator — (CDI) is an avionics instrument used in aircraft navigation to determine an aircraft s lateral position in relation to a track. If the location of the aircraft is to the left of course, the needle deflects to the right, and vice versa. Contents 1 …
55Dog-tooth — For other uses, see Dogtooth (disambiguation). Dog tooth ornament A dog tooth or dogtooth pattern , in architecture, is an ornament found in the moldings of medieval work of the commencement of the 12th century, which is thought to have been… …
56Deicing boot — The black rubber deicing boot on the wing of a Bombardier Dash 8 Q400 passenger aircraft is inflated with air, producing ridges to crack and dislodge any accumulated ice …
57Oleo strut — An oleo strut is an air–oil hydraulic shock absorber used on the landing gear of most large aircraft.[1] It cushions the impacts of landing and while taxiing[2] and damps out vertical oscillations …
58Radar altimeter — A radar altimeter, radio altimeter, low range radio altimeter (LRRA) or simply RA measures altitude above the terrain presently beneath an aircraft or spacecraft. This type of altimeter provides the distance between the plane and the ground… …
59Deceleron — A U.S. Navy A 6E Intruder approaches for a landing on the USS Dwight D. Eisenhower (CVN 69) in 1980, with its decelerons and tail hook deployed. A deceleron, or split aileron, was developed in the late 1940s by Northrop originally for use on the… …
60Dead centre — For the lathe tool, see lathe center. In a reciprocating engine, the dead centre is the position of a piston in which it is farthest from, or nearest to, the crankshaft. The former is known as top dead centre (TDC) while the latter is known as… …
