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Bombardier Dash 7
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Bombardier Dash 7

Bombardier Dash 7. A photo. Video. Characteristics. Reviews.

 

 

Bombardier Dash 7 - Canadian regional turboprop aircraft airliner landing and short takeoff. Designed and manufactured in the company deHavillandCanada 1975-1988, 113 just built copies.

 

Design. aircraft design

 

V1960 years of the company DeHavilland Canada was widely known aircraft short takeoff and landing, in particular - a model TwinOtter. These aircraft, however, were relatively small and were intended for regional services in more remote areas. Main same regional roads with a stable number of passengers served and roomy airplanes HandleyPageJetstream FokkerF27. Along with this, there was a huge number of airports with short runways, for which service, based on the turnover of goods and passenger traffic, needed a large enough plane.

Bombardier Dash 7

Some of these airports (especially older ones) were located close to the center of large cities. On the basis of conducted market research DeHavilland Canada has determined the appearance of the aircraft to be used in such an environment - Aviation turboprop airliner with a short landing and take-off and for up to forty passengers and a range of about 200 miles. The plane had planned to operate from short strips of 610 meters.

An important consideration in the design of aircraft noise was accounting standards produced by aircraft, introduced in 1970-ies. The problem of noise limits (especially stringent for city airports) has overcome some of the original design solutions: for example, used large diameter propellers with low operating speed (at takeoff - about 1200 rpm landing - 900 rpm.). Since propellers are a major source of noise in an airplane turboprop, the solution is largely reduced noise load.

vysokoplan with four engines, enhanced mechanization wing purge streams from the screw (which increases the lift), and tail T-tail: the next aerodynamic configuration has been used to obtain the characteristics of a short landing and takeoff of aircraft (landing speed of about 140 kilometers per hour). Most of the area of ​​the rear wing is occupied by fragments of a double complex Fowler flap, which creates more lift at low speeds. The ailerons are relatively small area, but it may play a role in the low-speed air brakes.

Bombardier Dash 7

Upon contact with the strip chassis sensors provide automatic cleaning command to the flap 25 percent, in order to effectively reduce the braking and lift; also available at the touch automatically spoilers (airbrakes) on the wings. Air reversible screws allow landing apply reverse thrust, reducing largely run length. The landing of the aircraft as a result of running, regardless of the oncoming wind, aircraft weight, energy and braking band in a range of state nahodistya 100-500 meters.

 

Using the Bombardier Dash 7

 

The first flight of an analogue produced 27.03.1975. The first aircraft were launched in series, were received by the aviation RockyMountainAirways in 1978 year. By the end of the main series production (1984 year, in connection with the transition to manufacturing Dash8), postromlm 100 aircraft. Extra small series (total 13 aircraft) was released in 1984-1988. Production lines in 1988 was halted after the company bought the Boeing enterprise.

The first industrial series Series100 manufactured in two variations -1 passenger and mixed cargo-102 103. Series110 Series Variations 111 and 110 and produced under the new requirements of the CAA with the changes. The last series Series150 (with 151 and 150 modifications) featuring a large capacity tanks and a better layout of the cabin.

Dash7 model's success in the market was moderate and not fully justified developer hopes. Most air carriers to use this aircraft for transportation in a fairly large airport, where the properties of the short landing and takeoff little demand. The aircraft with four engines require twice the amount of maintenance than the more common twin-engine turboprop aircraft, which increased the total cost of ownership. Number of airports, where the properties of the aircraft were in demand, in general, proved small.

Bombardier Dash 7

There were, of course, exceptions - for example, London City Airport in London. short strip, the steep angle of the glide path 7.5 degree and noise limits have led to a situation where only a few types of aircraft allowed to use at this airport: Dash7 was one of them.

It has found application in use at airports in mountainous, with a small length of GDP on short local lines in different countries, often - in the underdeveloped areas are not very well-developed infrastructure of airfields.

Airlines operating the airplane:. AirGreenland (Greenland), PelitaAirService (Indonesia), PetroleumAirServices (Egypt, VoyageurAirways and TransCapitalAir (Canada) also operates a US military aircraft.

 

The characteristics of the aircraft BombardierDash 7:

 

  • Length: 24.58m.

  • Height: 7.98m.

  • Empty weight: 12540 kg.

  • Wing area: 80kv.m.

  • Wingspan: 28.35m.

  • Maximum speed: 436km / h..

  • Ceiling: 6400m.

  • Flight range with maximum load: 1240km (Series150 - 2110km).

  • Engines: 4 × turboprop Pratt & WhitneyCanada PT6A50.

  • Link: 4h1120l.s (4h835kW).

  • Crew: 2cheloveka.

  • Number of seats: 50-54mest.

  • Maximum takeoff weight: 20000kg.

  • the run length: 670m.

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