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DHC Logo

The logo for De Havilland Canada.

De Havilland Aircraft of Canada Ltd. is an aircraft manufacturer with facilities based in the Downsview area of Toronto, Ontario, Canada.

The aircraft company was created in 1928 by the British de Havilland Aircraft Company to build Moth aircraft for the training of Canadian airmen, and subsequently after the Second World War, it has designed and produced indigenous designs. De Havilland Canada was made into a crown corporation of the Canadian government during World War II, and, despite its name, is no longer affiliated with de Havilland. It also builds aircraft like the Mosquito II under license.

EstablishmentEdit

Founded in 1928 as a subsidiary of de Havilland Aircraft, de Havilland Canada was first located at De Lesseps Field in Toronto, before moving to Downsview in 1929.

Pre-World War IIEdit

Flown for the first time on 26 October 1931, the DH.82 Tiger Moth was derived from the DH.60 Moth. The DH.82 was powered by a 120 hp Gipsy II engine, but the 1939 DH.82a received the 145 hp Gipsy Major. More than 1,000 Tiger Moths were delivered before the Second World War, and subsequently 4,005 were built in the UK and shipped all over the world. 1,747 were built in Canada (the majority being the DH.82c model with enclosed cockpits, brakes, tail wheels, etc.). The follow-up DH.83 Fox Moth was designed in England in 1932 as a light, economic transport and was built using as many Tiger Moth components as possible.

World War IIEdit

The de Havilland Tiger Moth was a basic trainer of the British Commonwealth Air Training Plan (BCATP) during the Second World War, whereby air crews from all over the British Commonwealth trained in Canada. DHC was a Canadian unit of the parent British de Havilland and during World War II was made into a crown corporation of the Canadian government.

Production of the Mosquito, nicknamed the "Mossie," was the company's greatest contribution to the war effort. To reduce wartime metal use, the airframe was constructed almost entirely out of plywood. The design intent of the Mosquito was speed instead of defensive armament, and as a result it was one of the fastest aircraft in the war, reaching 425 mph at 30,000 ft. The original design was intended as a light bomber, but soon proved itself in high-level photography and every phase of intruder operations.

Out of the more than 10,000 Mosquitoes produced overall by de Havilland, de Havilland Canada produced 2,381. Several were lost en route across the Atlantic but over 1,000 were delivered to the British Empire by the end of the war.

Post-World War IIEdit

After the war, de Havilland Canada began to build its own designs uniquely suited to the harsh Canadian operating environment. The company also continued licensed production of several British de Havilland aircraft.

DHC-1 ChipmunkEdit

The first true postwar aviation project was the DHC-1 Chipmunk, designed as a primary trainer, a replacement for the venerable de Havilland Tiger Moth. The Chipmunk was an all-metal, low wing, tandem two-place, single-engine airplane with a conventional tail wheel landing gear. It had fabric-covered control surfaces and a clear plastic canopy covering the pilot and passenger/student positions. The production versions of the airplane were powered by a 145 hp in-line de Havilland Gipsy Major "8" engine.

The Chipmunk prototype first flew on 22 May 1946 in Toronto and had a total production run of 332 Chipmunks for RCAF use while de Havilland (UK) produced 740 airplanes for training at various RAF and University Air Squadrons during the late 1940s and into the 1950s. The DHC-1 Chipmunk was still being used as a training aircraft by the UK's Army Air Corps up until 1995.

At the present, October 2011, the Chipmunk is in service with the RAF Battle of Britain Memorial Flight and RN Historic Flight, where it is used to train pilots to fly 'taildraggers' as a pre-requisite to flying the flight's Supermarine Spitfires and Hawker Hurricanes. All of the RAF's modern aircraft have tricycle undercarriage, so pilots are unfamiliar with tail wheel aircraft.

DHC-2 BeaverEdit

Returning to designing purpose-built aircraft for Canada's north, the DHC-2 Beaver was developed in 1947. After a survey of Canada's bush pilots, including Punch Dickins, the need for a rugged, highly versatile aerial truck which could take off and land almost anywhere, carry a large half-ton load, and be very reliable formed the basis of a new specification. The first of the STOL family that de Havilland would produce, the Beaver would carve a niche into the bush plane market.

In the civilian sector, the Beaver soon excelled on wheels, skis and floats, and Beavers were also purchased and used by the military services of numerous nations, including Canada, Britain, and Chile.

With almost 3,600 built in a production run lasting two decades, civilian-owned Beavers continue plying their trade in over 50 countries all around the world. A turbine-conversion, the Turbo Beaver (DHC-2 Mk.III) first flew in December 1963. This version featured a Pratt & Whitney Canada PT6A-6 turboprop, which offered lower empty and higher takeoff weights, and even better STOL performance. The Turbo Beaver's cabin was also longer, allowing maximum accommodation for 11, including the pilot. Externally, the Turbo Beaver had a much longer and reprofiled nose, and squared off vertical tail. DHC also offered conversion kits enabling piston-powered Beavers to be upgraded to Turbo standard. Other conversions have been performed by a number of companies including Kenmore Aviation and Viking Air.

DHC-3 OtterEdit

Another in de Havilland Canada's successful line of rugged and useful STOL utility transports, the Otter was conceived to be capable of performing the same roles as the earlier and highly successful Beaver, but was bigger, the veritable "one-ton truck."

Using the same overall configuration of the earlier and highly successful DHC-2 Beaver, the Otter is much larger overall. The Otter began life as the King Beaver, but compared to the Beaver is longer, has greater span wings and is much heavier. Seating in the main cabin is for 10 or 11, whereas the Beaver could seat six. Power is supplied by a 450 kW (600 hp) Pratt & Whitney Canada R1340 Wasp radial. Like the Beaver, the Otter can be fitted with skis and floats. The amphibious floatplane Otter features a unique four unit retractable undercarriage, with the wheels retracting into the floats.

Design work at de Havilland Canada began on the DHC-3 Otter in January 1951, the company's design efforts culminating in the type's first flight on 12 December 1951. Canadian certification was awarded in November 1952.

After de Havilland Canada demonstrated the Otter to the British Army, subsequently that service went on to become the largest DHC-3 operator. Other military users included Australia and Canada.

Small numbers of Otters were converted to turbine power by Cox Air Services of Alberta, Canada. Changes included a Pratt & Whitney Canada PT6A turboprop, a lower empty weight of 1692 kg (3705 lb) and a higher maximum speed of 267 km/h (144 kt). It was called the Cox Turbo Single Otter. A number of other after market PT6 conversions have also been offered.

The Otter found a significant niche as a bush aircraft and today it remains highly sought after.

DHC-4 CaribouEdit

De Havilland Canada's fourth design was a big step up in size compared with its earlier products, and was the first powered by two engines, but the DHC-4 Caribou was similar in that it is a rugged STOL utility. The Caribou was primarily a military tactical transport that in commercial service found itself a small niche in cargo hauling.

De Havilland Canada designed the DHC-4 in response to a Canadian Army requirement for a tactical airlifter to supply the battlefront with troops and supplies and evacuate casualties on the return journey. With assistance from Canada's Department of Defence Production, DHC built a prototype demonstrator that flew for the first time on 30 July 1958.

Impressed with the DHC4's STOL capabilities and potential, the Canadian Army ordered five for evaluation and went on to become the largest Caribou operator, taking delivery of 334. Other notable military operators included Vietnam and Spain.

The majority of Caribou production was for military operators, but the type's ruggedness and excellent STOL capabilities also appealed to a select group of commercial users. AnsettMAL, which operated a single example in the New Guinea highlands, and AMOCO Ecuador were early customers). Other Caribou entered commercial service after being retired from their military users.

In later years, some civilian Caribou were modified to turboprop standard, with varying successes. Today only a handful of Caribou, in any variant, are in civilian use.

DHC-5 BuffaloEdit

Known originally as the Caribou II, the DHC-5 Buffalo tactical transport was basically a beefed up DHC-4 with turboprop engines and a T-tail. The DHC-5 had been developed to meet the requirements of the Canadian Army for a transport that would be able to carry loads such as missiles, howitzers or trucks. Development costs were shared by the Canadian Army, Canadian government and de Havilland Canada; the first of these transports made its maiden flight on 9 April 1964.

256 were built in two production runs, including a handful of Buffalo aircraft for the Canadian Army and several transports for the RCAF. The Royal Canadian Navy also acquired several Buffalos, which were subsequently converted for deployment in a maritime patrol role.

Following delivery of 50 to the Brazilian Air Force and 34 to the Chilean Air Force, the production line was closed down. In 1974, the company realised there was a continuing demand for the Buffalo and production of an improved Buffalo (DHC-5D) was initiated. This version had more powerful engines which permitted operation at higher gross weights, and offered improved all-round performance. In the early 1980s, de Havilland Canada attempted to modify the Buffalo for civilian use. The aircraft was to be branded as the "Transporter." Production of the Buffalo ended in 1982, but the last of the aircraft built was not delivered until April 1985.

DHC-6 Twin OtterEdit

One of Canada's most successful commercial aircraft designs, with more than 800 built, the Twin Otter remains popular for its rugged construction and useful STOL performance.

Development of the Twin Otter dates back to January 1964, when de Havilland Canada commenced work on a twin turboprop variant of the DHC-3 Otter as a STOL twin turboprop commuter airliner and utility transport. The wings were lengthened, the rear fuselage, tail, and nose were redesigned and seating was increased to as many as 18.

The new aircraft was designated the DHC-6 and prototype construction began in November that year, resulting in the type's first flight on 20 May 1965. After receiving certification in mid-1966, the first Twin Otter entered service with longtime de Havilland Canada supporter, the Ontario Department of Lands and Forests.

The first production aircraft were Series 100s. Design features included double slotted trailing edge flaps and 'flaperons' (ailerons that act in unison with the flaps) to boost STOL performance. Compared with the later Series 200s and 300s, the 100s are distinguishable by their shorter noses, thinner propellers and smaller exhaust ports on the engines.

The main addition to the Series 200, which was introduced in April 1968, was the extended nose, which, together with a reconfigured storage compartment in the rear cabin, greatly increased baggage stowage area.

The Series 300 was introduced from the 485th production aircraft in 1969. It too featured the lengthened nose, but also introduced more powerful engines, thus allowing a 450 kg (1,000 lb) increase in takeoff weight and a 20 seat interior. All models are capable of being fitted with skis and floats. In addition, six 300S enhanced STOL performance DHC-6-300s were built in the mid 1970s.

Production on the Twin Otter ceased in late 1988. In 2010, de Havilland Canada began producing the first all-new Twin Otter, the Series 400.

DHC-7 Dash 7Edit

The four-engine DHC-7, popularly known as the Dash 7, was designed as an STOL 50-seat regional airliner capable of operating from strips as short as 915m (3,000 ft) in length. It was meant to serve small city airports like the London City Airport where noise requirements were particularly strict, and featured four slow-turning props to cut noise.

In order to allow the Dash 7 to achieve its excellent STOL characteristics the aircraft employs many aerodynamic devices. The wing flaps are double slotted and span approximately 75% of the trailing edge of the wing. In a typical STOL landing flaps will be set to 45° before landing which allows for a slower approach speed (typically 70–85 knots) and steeper descent. Upon touchdown the flaps immediately return to the 25° position which decreases the lift created by the wing thereby increasing braking effectiveness. The aircraft also employs two ground spoilers per wing, and two roll spoilers per wing. The roll spoilers' primary job is to augment the ailerons however upon touchdown all four roll spoilers activate along with all four ground spoilers to spoil much of the lift generated by the wing.

Financial backing from the Canadian Government allowed the launch of the DHC-7 program in the early 1970s, resulting in the maiden flight of the first of two development aircraft on 27 March 1975. The first production Dash 7 flew on 3 March 1977, the type was certificated on 2 May 1977 and it entered service with Rocky Mountain Airways on 3 February 1978. The type made the first ever landing at London Docklands Heron's Quay in 1983 paving the way for London City Airport. In 1987 the Dash 7 inaugurated flight service at LCA, with Brymon Airways. London City Airport saw Brymon Airways providing Dash 7 service from 1987, exploiting its excellent STOL capabilities.

The standard passenger carrying Dash 7 is the Series 100, while the type was also offered in pure freighter form as the Series 101. Maximum take-off weight was 42,000 lbs. These were followed shortly by the Series 102 (passenger variant) and the Series 103 (a combination passenger/freighter variant) which had more powerful engines. Maximum take-of weight was increased to 44,000 lbs. The only major development of the Dash 7 was the Series 150, which featured a higher maximum takeoff weight and greater fuel capacity, boosting range. The Series 151 was the equivalent freighter. The maximum take-off weight was 47,000 lbs. Production of the Dash 7 ended in 1988.

DHC-8 Dash 8Edit

De Havilland Canada began development of the Dash 8 in the late 1970s in response to what it saw as a considerable market demand for a new generation 30 to 40 seat commuter airliner. The Dash 8 emphasized operational economics over STOL performance, which proved much more successful.

Like the Dash 7, the Dash 8 features a high mounted wing and T-tail, an advanced flight control system and large full length trailing edge flaps. Power is supplied by two Pratt & Whitney Canada PW120 series (originally designated PT7A) turboprops. The first flight of the first of two preproduction aircraft was on 20 June 1983, while Canadian certification was awarded on 28 September 1984. The first customer delivery was to NorOntair of Canada on 23 October 1984.

The aircraft was introduced just as an older generation of feederliners was becoming too old to maintain economically, and there were few other new aircraft designs of its size that were ready for purchase; the ATR-42 entered service a year later, while most other designs (Dornier 328, Fokker 50, etc.) were only started in response to the success of the Dash 8. To date over 2000 Dash 8's have been delivered. In April 2008, de Havilland Canada announced that production of the 100, 200, and 300 series Dash 8's would be ended, leaving the Q400 as the only Dash 8 still in production. On June 2009, dHC's commercial aircraft president stated that a stretched Q400 model will be "definitely part of our future", for possible introduction in 2013-14.

DHC-9 BisonEdit

The DHC-9 Bison began development in the 1980s, during the modernization of the Canadian Armed Forces. The Royal Canadian Air Force put out a requirement for a heavy tactical airlifter which would be able to operate in rough conditions. Like de Havilland Canada's earlier military transports, the Caribou and the Buffalo, the Bison is rugged and able to take off and land on very short runways.

Funded by the RCAF as well as dHC, the Bison flew for the first time in 1989; however design issues caused production to be delayed. Nevertheless, when the DHC-9 Bison entered service in 1993, it was immediately well received. The Bison is powered by four Pratt & Whitney Canada PW180 turboprops, and is able to carry about 25,000 kilograms with excellent STOL performance and in harsh conditions.

Production of the Bison continues to today. The RCAF is the main operator of the DHC-9, but it has also achieved success in the export market, serving in countries like Ireland, the Netherlands, and South Africa.

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