De Havilland Canada Dash 7
The de Havilland Canada DHC -7 Dash 7 also briefly (English for "dash 7"), is a 50 -seat regional aircraft. It's STOL capability (short takeoff and landing ), that is, it can airports with short take-off and landing runways fly.
History
Back in the early 1970s was at de Havilland Canada to build a robust Turbopropmusters with a required length of the take-off and landing strip of max. 700 m high climb rate for topographically unfavorable lying airfields and low noise level for suburban airports thinking. To achieve this, the DHC Dash 7 was equipped with wing in wing monoplane construction, buoyancy aids and four slowly rotating, quiet propeller turbines.
After the maiden flight on 27 March 1975 and its launching in January 1978, the pattern has been to 1988 delivered 113 times. Thereafter, production due to lack of demand due to the availability of more efficient and quicker pattern was, like the Dash 8Q -300 or ATR 72 set. There apparently were too few routes on which both the STOL capabilities of the Dash 7, as well as their passenger capacity were required. The accelerated and promoted by de Havilland operation on cross slopes of large airports could be implemented only in individual cases. Also involved in the design of the aircraft at the beginning of the 70s expected City Airport were actually built in only a few cities. Nevertheless, the aircraft is still on some heavy anfliegbaren airfields in the world in action.
As the successor emerged from the early 80s the twin-engine Dash 8 with a similar basic concept, but without the pronounced STOL characteristics of the Dash 7
Versions
There are two versions of the series 100 as pure passenger version, and the Series 101 Fracht-/Passagierversion large cargo door on the left side of the fuselage in front of the wing. The project under the type designation DHC Dash 7-300 for a 70 - seater pattern was not realized due to lack of demand.
In addition to the civilian versions, there are some military equipment, the CC- 132 for the Canadian Forces, a Dash - 71R for the Canadian Coast Guard, a version for the Venezuelan Navy and the Dash 7 Ranger as Canadian Seeaufklärungsversion. As RC -7 upgraded Dash 7 with elaborate reconnaissance equipment of the American armed forces, including the fight against drug-related crime. A Dash 7 with patch on the front fuselage observation chamber is used in Canada for the observation of drift ice and icebergs.
Method of construction
- Wing: wing monoplane design with a large extension and large double slit flaps to increase lift. Relatively small ailerons supported by spoilers, which are used on the ground as brake systems.
- Hull: light metal fuselage with a circular cross section and pressure cabin
- Tail: T-tail in all-metal construction
- Suspension: Retractable tricycle landing gear, main landing gear retracts forward into the inner engine nacelles, nose wheel to the rear. ( The landing gear doors remain open in the main landing gear landing gear. , The rear flaps of the nose landing gear close again to prevent stone chips in the wheel well, but open, shut off the plane as soon as the hydraulic pressure drop.)
- Powerplant: 4 × PT6A turboprop engine with 4-blade propellers with low RPM's to reduce the noise ( at the start 1210/min, in cruise flight 900-1070/min )
Special
- The Dash 7 was approved ( by the operator Tyrolean Airways ) is the only commercial aircraft for operation on the altiport Courchevel.
- In order to reduce the buoyancy of the rear flaps are retracted automatically when the Dash 7 after landing. The same is done to reduce the air resistance at a go-around.
Operators in Europe
In Europe or the Dash 7 is operated at the following airlines:
- Adria Airways (Yugoslavia, Slovenia)
- Air Greenland (6 machines on national routes in Greenland)
- Brymon Airways ( UK )
- London City Airways ( UK )
- Maersk Air ( Denmark)
- Tyrolean Airways ( Austria ), 1980-1998
- Widerøe 's Flyveselskap (Norway )