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.
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.
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.
Research has made it possible to determine the best thickness of the wing, with which it is possible to achieve the required volume of fuel tanks, light weight design, high-performance cruising low values of operating direct costs. When calculating the cost of a liter of fuel 1 0,4 taken for the dollar. At low fuel cost profile thickness is not particularly affect the PER, but with better fuel value of the PER increases gradually with an increase in the thickness of the wing. For the SF-340 aircraft found the best wing profile with a slight drag. Optimized wing shape, given the characteristics of operation - typically there is usually a couple of flight stopovers.
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.
The fuselage consists of three main sections: the nose (from the cockpit), central tail (with luggage compartment). The fuselage has a circular cross-sectional shape. The tail and nose section are semi-monocoque conventional design. The central section is the top, bottom and two side panels. These panels vklyuchayui a casing to which the reinforcing plates and stringers. In addition, the side panels are provided with glued window frames. All four panels when assembled by rivets are connected with each other and with power formers. For aircraft have been specially developed new passenger lightweight seats, which are made of composite materials. Under the seats there is space for hand luggage. Large windows allow a good view. Above each place panel mounted alarm with individual fan and lamp. In front of the cabin are located in closet, toilet and a snack bar.
Saab 340 salon
The passenger cabin is ten rows of seats for two + one scheme and another row of four seats behind the cab. On the left side of the front of the cabin passenger door is convertible separate ladder. To starboard is a service door. On the left is located in the tail of the fuselage cargo door. Over the wings on both sides of the fuselage located emergency exits. At the tail of the fuselage is a compartment, which is on the port side has a large cargo door. The partition that separates the passenger cabin and luggage compartment, can be moved, allowing the aircraft to quickly convert Utility.
Kiel and the stabilizer have a cell structure with a filler made of aluminum alloy. Area stabilizer sosatvlyaet 13,3 square meters, the keel - 8,07 square meters. Elevators (with the area - 3,46 square meters) and rudder (with the area - 2,72 square meters) made of a composite material based on Kevlar fibers; end rudder - fiberglass. All steering wheels are equipped with trimmers. The control system bezbusterny type. To control the cross sectional used ailerons (area 2,12 square meter). Each is equipped with aileron servotrimmerom power. Ailerons are made of composite fibers based on Kevlar. The longitudinal and track control and made elevators and directions.
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.
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
Features Saab 340:
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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