See also
 | This disambiguation page lists articles associated with the title Delta 4. If an internal link led you here, you may wish to change the link to point directly to the intended article. |
Delta 4 or variant may refer to:
| | This disambiguation page lists articles associated with the title Delta 4. If an internal link led you here, you may wish to change the link to point directly to the intended article. |
A delta wing is a wing shaped in the form of a triangle. It is named for its similarity in shape to the Greek uppercase letter delta (Δ).
DDD or Triple D may refer to:
Alexander Martin Lippisch was a German aeronautical engineer, a pioneer of aerodynamics who made important contributions to the understanding of tailless aircraft, delta wings and the ground effect, and also worked in the U.S. His most famous designs are the Messerschmitt Me 163 rocket-powered interceptor and the Dornier Aerodyne.
The DFS 194 was a rocket-powered aircraft designed by Alexander Lippisch at the Deutsche Forschungsanstalt für Segelflug.
Alexander Lippisch's Delta IV was a continuation of his work on delta wing designs pioneered in his Delta I, Delta II and Delta III aircraft.
The DFS 40 was a tail-less research aircraft designed by Alexander Lippisch in 1937 as a follow-on to his Delta IV aircraft. In construction, the DFS was closer to a flying wing than its predecessor, and was built as an alternative to that aircraft.
The Lippisch P.13a was an experimental ramjet-powered delta wing interceptor aircraft designed in late 1944 by Dr. Alexander Lippisch for Nazi Germany. The aircraft never made it past the drawing board, but testing of wind-tunnel models in the DVL high-speed wind tunnel showed that the design had extraordinary stability into the Mach 2.6 range.
The Lippisch P.13b was a World War II German ramjet powered fighter aircraft designed by Alexander Lippisch. Designed in December 1944, the P.13b was a further development of the similarly delta-winged Lippisch P.13a, which was also a ramjet fighter. The cockpit was located in the nose of the fuselage, and was mounted forward of the delta wing, which featured downturned wing tips. Main landing gear comprised a retractable skid, while the rear of the aircraft would rest on the reinforced wing tips.
The Akaflieg Darmstadt/Akaflieg München DM1, also called the Lippisch DM-1, was a single-seat research glider that was designed and built in Germany from 1944.
A tailless aircraft has no tail assembly and no other horizontal surface besides its main wing. The aerodynamic control and stabilisation functions in both pitch and roll are incorporated into the main wing. A tailless type may still have a conventional vertical fin and rudder.
The Pobjoy R is a British seven-cylinder, radial, air-cooled, aircraft engine designed and built by Pobjoy Airmotors. Introduced in 1926 it was a popular engine for ultralight and small aircraft in the 1930s. A notable feature of the Pobjoy R was the propeller reduction gear which allowed the small engine to operate at more desirable higher speeds.
Weltensegler G.m.b.H. was a German aircraft company formed by Friedrich Wenk, who became its Technical Director.
The DFS 193 was a planned experimental German aircraft of the 1930s planned by Deutsche Forschungsanstalt für Segelflug (DFS). Designed by Professor Alexander Lippisch and a DFS employee named Roth, it resembled Lippisch's Storch IX and the Gotha Go 147.
The RFB X-113 Aerofoil Boat was an experimental ground effect vehicle intended to work over water. It was one of three such aircraft designed by Alexander Lippisch in the 1960s and early 1970s. The X-113 first flew in 1970; only one was built.
The Collins X-112 was an experimental two seat ground effect vehicle, designed by Alexander Lippisch in the United States in the early 1960s to test his thick reverse delta wing concept.
The RRG Storch V was the only member of Alexander Lippisch's Storch series of tailless aircraft to be powered. It flew successfully in 1929.
The RRG Delta I was a German experimental tailless aircraft flown in the early 1930s first as a glider and then powered. It was one of the first delta wing aircraft.
The Fieseler F 3 Wespe ("Wasp") was a German aircraft developed in the early 1930s by Gerhard Fieseler. Little history of the aircraft remains due in part to destruction of records and documents during World War II.