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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 point in the design of the aircraft was to take into account the noise standards produced by the aircraft, introduced in the 1970-ies. The problem of noise limits (especially strict ones for city airports) was overcome by some original design decisions: for example, large-diameter propellers with small working rpm were used (on take-off mode - about 1200 rpm, landing - 900 rpm). In view of the fact that propellers are the main source of noise in a turboprop aircraft, this solution has largely reduced noise loads.

To obtain the characteristics of the short landing and take-off of the aircraft (landing speed about 140 kilometers per hour), the following aerodynamic scheme was used: a high-wing with four motors, reinforced wing mechanization, blown by screws (which increases the lifting force), and a tail T-tail. Most of the area of ​​the rear wing fragments is occupied by Fowler's double complex flap, which creates a large lift at low speeds. Ailerons are characterized by a relatively small area, but the role of air brakes can play at low speed.

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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