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Saab 340
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Saab 340

Saab 340. Photo. Video. Driving salon. Characteristics. Reviews.

 

 

Saab 340 - turboprop airliner Swedish company «Saab AB».

The aircraft is a cantilever monoplane with low-positioned wing, all-metal design and power with selective use of composite materials. Designed in two versions: the basic configuration of air transport and another option for service transortirovok.

 

Wing

 

The wing has a trapezoidal shape with two side members, preferably made of aluminum alloy. It consists of two structurally consoles, joints along the longitudinal axis of the aircraft under the fuselage. This is achieved by weight reduction and increased resource structure. The upper and lower wing skin is manufactured in the form of panels with stringer stamped and glued plates. The volume between the spars hold fuel tanks. The front end of the wing is able to withstand the impact of birds. Composite materials are also used in the construction of the flaps.

 

Saab 340 in flight

 

When designing the wing of the company, "Fairchild" and "Saab" decided to use such a profile, which provides a good aerodynamic properties of the wing and at the same time, the volume sufficient to accommodate fuel tanks. We studied the profiles, designed for small and medium speed designed in Langley Research Center (NASA). The best turned out to profile MS (1) 0313.

Advanced NASA profiles significantly superior to conventional NACA profiles in relation to the lift. Profiles NASA climb possess aerodynamic efficiency on 31-55 percent higher profiles NACA, and have at cruising polёtenebolshoe advantage. The larger value of lift is usually associated with a higher pitch moment, but for profiles such as MS is usually not performed.

Studies have made it possible to determine the best thickness of the wing, at which it is possible to achieve the required volume of fuel tanks, low weight of the structure, high cruising characteristics of low operating direct costs. When calculating the cost of 1 liters of fuel was taken for 0,4 a dollar. At a low fuel cost, the thickness of the profile did not particularly affect the PED, but with better fuel quality, the value of the PED increases gradually with increasing thickness of the wing. For the SF-340 aircraft, the wing with a profile with a slight drag was found to be optimal. The shape of the wing was optimized, taking into account the operational features - in a typical voyage, there is usually a couple of intermediate landings.

The calculation takes into account the size of the wing are two main requirements: landing with landing weight limit and climb on one engine running with the band, which is located at an altitude of 1525 meters above sea level, in a + 30 degrees Celsius.

 

Fuselage

 

The fuselage consists of three main sections: bow (with crew cabin), central, tail (with luggage compartment). The fuselage has a cross-sectional shape. The tail and nose sections are of semi-monocoque design. The central section consists of the upper, lower and two side panels. These panels include a skin, to which reinforcing stringers and lining are attached. In addition, the side panels are equipped with glued windows frames. All four panels, when assembled with rivets, are connected to each other and to the frame frames. For the aircraft, new passenger light armchairs were specially designed, which are made of composite materials. Under the armchairs there is space for hand luggage. Large windows allow a good view. Above each place is mounted alarm panel with individual fan and lamp. In front of the cabin are a wardrobe, toilet and buffet.

 

Saab 340 salon

Saab 340 Salon

 

In the passenger cabin there are ten rows of seats according to the scheme of two + one and another row of four chairs at the back of the cabin. On the left side of the front of the cabin is a passenger door with a folding separate gangway. On the starboard side is the service door. On the left in the tail of the fuselage is a cargo door. The emergency exits are located above the wing on both sides of the fuselage. In the tail of the fuselage there is a compartment, which has a cargo door on the left side. The partition, which separates the passenger cabin and the luggage compartment, can move, which makes it possible to convert a plane quickly into a cargo-passenger one.

 

Plumage

 

The keel and stabilizer have a honeycomb structure with an alloy of aluminum alloy. The area of ​​the stabilizer sucks 13,3 square meters, keel - 8,07 square meters. The elevator wheels (having an area of ​​- 3,46 square meters) and the rudder (with an area of ​​- 2,72 square meters) are made of composite material based on Kevlar fibers; The end of the rudders is made of fiberglass. All rudders are equipped with trim tabs. Management system without a bussiness type. To control the cross section, ailerons are used (an area of ​​2,12 square meters). Each aileron is equipped with a servotrimmer with an electric drive. The ailerons are made of a composite material based on Kevlar fibers. Longitudinal and track and control is made by rudders of height and direction.

 

Chassis

 

Tricycle landing gear of the aircraft (the rack with dual wheels). Managed the front desk. Available damper automatically The vibrations. Stand retracted forward into the chamber on the fuselage. Rear racks are cleaned in the gondola theater forward. Wheels rear racks are equipped with disc brakes of the company «Goodyear», where vending machines are braking.

 

Electronic equipment

 

SF-340 aircraft is equipped with an integrated digital electronic system of automatic control and the guiding FGAS firm "Collins" .In It includes VNI-80B vertical navigation system with minicomputers, digital flight data processing system ADS-81 and EFIS-86 complex flight and navigation electronic digital device with four colored indicators elektronno0luchevyh tubes.

The aircraft was operated in the army as long-range reconnaissance. It established a system of "Eria", at the moment it is mounted as the airliners Saab 2000.

 

Saab 340 scheme salon

Saab 340 scheme salon

 

Features Saab 340:

 

Length: 19,73m.

Height: 6,97m.

Wingspan: 21,44m.

Wing area: 41,8kv.m.

Cruising speed: 467km / h.

Maximum speed: 523km / h.

Flight range: 1 730km.

Number of seats: 30,33,34,36 places

Crew: 2 person

Empty weight: 8140kg.

Maximum takeoff weight: 13155kg.

Engines: theater GeneralElectric CT79B (2 instance).

Link: 2 × 1295kVt (1735l.s.).

  

 

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