Saab 340
other
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, Fairchild and Saab decided to use such a profile that provides the wing with good aerodynamic properties and at the same time enough space to accommodate the fuel tanks. Investigated profiles designed for medium and low speeds, designed in SIC Langley (NASA). The best was the profile of MS (1) 0313.

Improved NASA profiles outperform the much more common NACA profiles in terms of lift. NASA profiles, while climbing, have aerodynamic quality on the 31 — 55 is a percentage higher than the NACA profiles, and have a slight advantage in cruising. A higher lift is usually associated with a higher pitch moment, but this is not the case for MS profiles.

Studies have made it possible to determine the best thickness of the wing, at which the required volume of fuel tanks, low weight of the structure, high cruising characteristics of low values ​​of operating direct costs can be achieved. When calculating the cost of 1 liter of fuel was taken for 0,4 dollar. With a low cost of fuel, the profile thickness did not particularly affect the PER, but with better fuel quality, the PER value increases gradually with increasing wing thickness. For the SF-340 aircraft, we found the optimal wing with a profile with a small frontal resistance. The shape of the wing was optimized, taking into account the peculiarities of operation - a typical intermediate flight usually has a pair of intermediate landings.

When calculating the wing dimensions, two main requirements are taken into account: landing with maximum landing weight and climb with one engine running from the strip, which is located at an altitude of 1525 meters above sea level, under + 30 degrees Celsius.

Fuselage

The fuselage consists of three main sections: the bow (with the crew cabin), central, tail (with the luggage compartment). The fuselage has a cross-sectional shape. The tail and nasal section has a semi-monocoque conventional structure. The central section consists of the upper, lower and two side panels. These panels include the casing to which the reinforcing stringers and linings are attached. In addition, the side panels are provided with glued window frames. All four panels at assembly with the help of rivets are connected with each other and with power frames. For the aircraft were specially developed new passenger lightweight seats, which are made of composite materials. Under the seats there is space for hand luggage. Large windows provide a good overview. Above each place is mounted alarm panel with an individual fan and lamp. In front of the cabin are a wardrobe, toilet and a sideboard.

Saab 340 Salon

Saab 340 Salon

In the passenger cabin there are ten rows of seats according to the scheme two + one and one more row of four seats behind the cabin. On the left side of the cabin front there is a passenger door with a hinged separate ladder. On the starboard side there is a service door. The cargo door is located to the left in the fuselage tail. Emergency exits are located above the wing on both sides of the fuselage. At the tail of the fuselage there is a compartment, which has a large cargo door from the left side. The partition that separates the passenger cabin and the luggage compartment can be moved, which makes it possible to quickly convert the aircraft into a cargo-passenger.

Plumage

The keel and stabilizer have a honeycomb structure with a filler of aluminum alloy. The stabilizer area is 13,3 square meters, and the keel is 8,07 square meters. The elevators (with 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 steering wheel - fiberglass. All wheels are trimmed. Booster type control system. Ailerons (2,12 square meters) are used for cross-section control. Each aileron is equipped with an electrically driven servo trimmer. The ailerons are made of composite material based on kevlar fibers. Longitudinal and track and control is made rudder 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

The SF-340 aircraft is equipped with an electronic integrated digital system for automatic and directorial management of FGAS by Collins. It includes the VNI-80B vertical navigation system with a mini-computer, a digital flight data processing system ADS-81 and an EFIS-86 flight-navigation complex electronic digital devices with four indicators of color electron 0 radiation tubes.

The aircraft was operated in the army as a long-range reconnaissance aircraft. The Eriai system was installed on it, at the moment it is also being mounted on Saab 2000 airliners.

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: GeneralElectric CT79B TVD (2 instance).

Link: 2 × 1295kVt (1735l.s.).

Saab 2000

Other planes

.
upstairs