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Delta Connection
Delta Connection is Delta Air Lines' regional airline brand, under which partner carriers Endeavor Air, Republic Airways, and SkyWest operate flights using Delta's DL code.
Delta wing
The delta wing is a triangular, highly swept, low-aspect-ratio aircraft wing planform named for the Greek letter Δ, which became the standard shape for supersonic aircraft.
Denel Rooivalk
The Denel Rooivalk, or Rooivalk, is a South African attack helicopter that entered South African Air Force service in 1999 and first saw combat in the Congo in 2013.
Density altitude
Density altitude is the altitude in the standard atmosphere at which air density matches the air at a given point, used by pilots as an index of aircraft performance.
Denver International Airport
Denver International Airport is the primary airport for Denver, Colorado, opened in 1995 on a 53-square-mile site, now the fourth-busiest airport in the United States.
Departure (TV series)
Departure is a Canadian-British thriller drama television series created by Vincent Shiao, starring Archie Panjabi as aviation investigator Kendra Malley, with Christopher Plummer in his final role.
Depth charge
A depth charge, also called a depth bomb, is an anti-submarine weapon dropped from ships or aircraft that detonates at a preset depth to destroy submerged submarines.
Derwitzer Glider
The Derwitzer Glider was a hang glider built by Otto Lilienthal in 1891, flown near Derwitz in Brandenburg and seen as the beginning of successful human flight.
Desert Air Force
The Desert Air Force, also known as the Western Desert Air Force, was the RAF formation supporting the Eighth Army in North Africa and Italy from 1941 to 1945.
Designated Pilot Examiner
A Designated Pilot Examiner (DPE) is a private individual, not an FAA employee, appointed by the FAA to conduct pilot certificate and rating practical tests, roughly 124,000 in fiscal 2024.
Detroit Metropolitan Airport
Detroit Metropolitan Wayne County Airport, also called Detroit Metro Airport or DTW, is an airport in Romulus, Michigan, about 15 miles south of Detroit, and Michigan's busiest.
Dewoitine D.520
The Dewoitine D.520 was a French single-seat fighter of World War II, the most capable fighter of the French Air Force in 1940, though too few reached squadrons in time.
DFS Deutsche Flugsicherung
DFS Deutsche Flugsicherung (DFS) is the German air navigation service provider, a State-owned company that controls all IFR flights in German airspace from four control centers.
DHL Aviation
DHL Aviation is the air transport arm of DHL Express, a group of owned and partner cargo airlines flying more than 295 freighters through hubs on three continents.
Diamond DA62
The Diamond DA62 is a twin-engine, seven-seat light aircraft built by Diamond Aircraft Industries, certified by EASA in 2015 and powered by two Austro Engine AE330 jet-fuel piston engines.
Diana Sailplanes Diana
The SZD-56 Diana, also called the Diana 2, is a Polish high-performance racing sailplane in the FAI 15-meter flapped class, first flown in its modern form in 2005.
Dick Rutan
Richard Glenn "Dick" Rutan was an American aviator and Air Force pilot who, with Jeana Yeager, flew the first nonstop, unrefueled flight around the world in 1986.
Didier Delsalle
Didier Delsalle, born in 1957, is a French experimental test pilot for Eurocopter who landed a helicopter on the summit of Mount Everest on 14 May 2005.
Dieter Dengler
Dieter Dengler (1938–2001) was a German-born US Navy pilot shot down over Laos in 1966 who escaped after five months as a prisoner and received the Navy Cross.
Direction générale de l'Aviation civile
The Direction générale de l'Aviation civile (DGAC) is the French state administration responsible for civil aviation safety, air traffic management, and market regulation, created by decree in 1976.
Directorate General of Civil Aviation (India)
The Directorate General of Civil Aviation, or Indian DGCA, is the regulatory body for civil aviation in India, primarily responsible for safety and headquartered in New Delhi.
Dive bomber
A dive bomber is a combat aircraft that drops its bomb in a steep dive for accuracy, used most by the US Navy in World War II.
DJI
DJI (大疆创新, Dajiang Innovations), Shenzhen-based private company founded 2006 by Frank Wang, is the world's largest drone maker with over 70% global market share, maker of Phantom, Mavic, Matrice, AGRAS, and Osmo products.
DJI Air
DJI Air, originally Mavic Air, is a series of folding camera drones made by DJI, running from the 2018 Mavic Air to the Air 3S of 2024.
DJI Matrice
The DJI Matrice is a series of enterprise quadcopter drones made by DJI, spanning the developer-oriented Matrice 100 of 2015 to the industrial Matrice 350 RTK.
DJI Mini
DJI Mini, known as the Mavic Mini at its 2019 launch, is a DJI series of folding camera drones built to weigh under 250 grams, exempting them from FAA registration.
DO-160
DO-160, titled Environmental Conditions and Test Procedures for Airborne Equipment, is an RTCA standard, first published in 1975, for environmental testing of civil aircraft equipment.
DO-254
DO-254, Design Assurance Guidance for Airborne Electronic Hardware, is a 2000 RTCA guideline for assuring complex custom airborne electronic hardware such as ASICs, PLDs, and FPGAs.
DO-365
DO-365, the RTCA standard Minimum Operational Performance Standards for Detect and Avoid systems, defines how unmanned aircraft detect traffic, alert remote pilots, and remain well clear of other aircraft, first published in 2017.
Dogfight
A dogfight is a close-range aerial battle between fighter aircraft, each maneuvering to gain a firing position on the other, a practice dating from the First World War.