One of a new range of helicopters being produced for the light training market, the D2 is produced by Delta Development Co of Tonah in Queensland and is a diesel-engined powered light helicopter with a skid landing gear.

In the early 1980s Delta Technology in the United States produced a number of ultralight aircraft of high-wing configuration with conventional tail surfaces on a monoplane wing, the ailerons and elevators being operated by a control stick, the rudder being operated by pedals.

Development Technology Aero (DTA) later known as Delta Trikes Aviation) was founded in France in 1990 by Jean-Michel Dizier to produce a range of trikes and machines were developed to meet aerial work requirements, including agriculture, territorial tracking and pipeline work.

Denney Aircraft Co was formed in 1985 in Boise, Idaho, to build a two-seat ultra-light aircraft, and this received the name Kitfox, being available in kit form, and 21 kits were delivered to constructors during the first year.

Armand Deperdussin, who founded the Societe pour les Appareils Deperdussin in 1910, obtained the services of Mr Berchereau as chief designer to develop a series of aircraft.

The Desoutter series of aircraft was produced in two models by the Desoutter Aircraft Co Ltd at Croydon Aerodrome, Surrey.

The LS-8 series of high-performance gliders emanated from Germany and was designed in 1994 to meet the requirements of some operators to have an engine for sustaining flight to prevent out-landings and sometimes damage to the aircraft.

The prototype DH.60 (G-EBKT – c/n 168) was flown for the first time on 22 February 1925 by Geoffrey de Havilland

In the late 1920s de Havilland was looking at building its own engine for its light biplanes and to this end produced the Gipsy engine initially rated at 75-kw (100-hp) designed by Major F B Halford

In the late 1920s de Havilland was working towards the development of a light-four-cylinder in-line engine for aviation use and in 1931 designed a new variant of the upright Gipsy III engine which ran inverted

The DH.61 was produced by de Havilland in 1927 as a “six-eight passenger machine for Australia”

In 1925 de Havilland designed a large biplane powered by three air-cooled radial engines known as the DH.66.

The DH.71 Tiger Moth was built in secrecy at Stag Lane in 1927 for high-speed research, mainly to act as a flying test-bed for a new series of engines being designed by Major F B Halford

The DH.75 Hawk Moth was an attempt by de Havilland to develop an aircraft which provided the comfort one usually associated with a ‘good motor car’.

The prototype of the Puss Moth, the DH.80, with the test registration E-1 (later G-AAHZ – c/n 396) flew for the first time at de Havilland’s aerodrome at Stag Lane on 9 September 1929.

The design of the DH.82 emanated from the DH.60 series. Basically, the DH.82 was developed from the DH.60T Tiger Moth, which was a DH.60 with a Gipsy 3 engine, re-positioned centre-section struts ahead of the front cockpit, and an altered centre of gravity achieved by giving the mainplanes a 48-cm

Designed by A E Hagg as a low-cost, light transport, the prototype DH.83 Fox Moth (G-ABUO – c/n 4000) flew for the first time in March 1932.

The DH.84 Dragon was introduced to the de Havilland range of light aircraft in 1933, the prototype (E9 - c/n 6000 – later G-ACAN) having flown for the first time on 12 November 1932, later going to Hillman Airways Ltd as Maylands. Designed by A E Hagg, it was a

Leopard Moth appeared in 1933 as a successor to the DH 80 Puss Moth. The prototype was flown for the first time at Stag Lane, Edgeware, UK, on 27 May 1933 with Class B marking E1, later becoming G-ACHD (c/n 7000), and it became the personal aircraft of Capt de

The DH-86 (known as the Express Air Liner) was designed and built in four months in 1933 to meet a specification produced by the Australian Government for a fast, economical ten-passenger airliner to serve the route from Australia to Singapore.

The DH.87, which was designed and built in 1937 as a replacement for the DH.60 Gipsy Moth series, had a Gipsy Major engine and side-by-side seating.

The story of the DH.88 Comet series of racing aircraft is well known and has been told many times.

In 1933 de Havilland designed a faster and more comfortable version of the DH.84 Dragon and, when the prototype (E-4, later CH-287, HB-ARA, HB-APA – c/n 6250) was flown at Stag Lane by Hubert Broad on 17 April 1934, it was known as the DH.89 Dragon Six.

The Dragonfly, the prototype of which (E-2 c/n 7500 – later G-ADNA) was first flown on 12 August 1935, was designed as a twin-engine business and executive transport seating five.

Designed as a successor to the Moth biplane series of light aircraft, the Moth Minor had a similar performance to the Tiger Moth, although it had far less power.

The Devon was a development of the de Havilland Dove for military operation, the prototype of the Dove (G-AGPJ) having first flown at Hatfield on 25 September 1945 in civil guise.

The Dove was designed and the end of World War II to replace the superseded DH-89 Dragon Rapide.

The Boomerang is a fairly new aircraft to the Australian scene, being developed by the D & C Aircraft Company of Glamorganvale, QLD

The Dart Kitten monoplane was built by Dart Aircraft Limited in 1936 and the sole Mk I (G-AERP) flew for the first time on 15 January 1937

In the 1960s France and Germany worked together to jointly develop and produce an advance jet trainer, with a light attack variant, for service with their air forces and this involved the production of 200 aircraft for each service

The Falcon 10, which was also known as the Mystere 10, first appeared in 1969 as a scaled-down Falcon 20

In 1961 Dassault entered the business-jet market with the design of the Mystere, which is known as the Falcon in the USA

The Falcon 50 was a larger development of the Mystere/Falcon 20 series of business and executive aircraft

On 27 May 1983 Dassault-Breguet announced a programme to develop an intercontinental three-turbofan executive transport to be known as the Mystere or Falcon 900

The Falcon 2000 was first announced at the Paris Air Show at Le Bourget in June 1988 (as the Falcon X) as a new model in the company’s range of business jets, to become a replacement for the 20 and 200 series

The Falcon X was introduced to the market in 2005 at the Paris Air Show as a large-cabin, long-range business jet by Dassault and since its first flight on 5 May 2005 has been popular, with more than 200 examples delivered

The Davis DA-2 is a two-seat side-by-side low-wing sporting monoplane fitted with an all-moving VEE-tail having an included angle of 100 degrees

Known as Project Skyward, work upon which commenced during World War II in March 1943, the DCA Fleep, as it was known, was a conversion of a Willys 4 x 4 ¼-ton Jeep to accept a gyrocopter head so it could be flown to battle areas

For many years the Canadian de Havilland company has specialised in designing and building short take-off and landing (STOL) aircraft for a variety of uses, but mainly for the utility role

The Dash-8 is one of a long-line of highly successful STOL military and commercial transports produced by the Canadian company at Downsview, Ontario.