Viktor Nikolayevich Belyayev had an illustrious early career with TsAGI, AVIAVnito, Aeroflot, OMOS, AGOS, KOSOS and the TupolevOKB. He also designed and built several gliders from 1920, including flying wing designs, and in 1934 he designed a transport aircraft with twin tail-booms each accommodating ten passengers.
Belyaev developed the twin boom idea into the twin-fuselage DB-LK, which had two short fuselages either side of a very long chord wing centre section, with the outer wing sections swept forward 5 deg 42 min, tapering at 7:1 out to raked back tips. A large fin and rudder on a short central boom, carried a small tailplane with very large elevators.
The airframe was of light alloy stressed skin construction with five spar wings covered with sheet aluminium alloy. Each fuselage pod carried a single M-88 engine in a long chord cowling, driving a three-bladed VISh-23D propeller, as well as a pilot/navigator cockpit and radio operator/gunner station in each of the extensively glazed tail-cones. The outer wings had slats, ailerons and 45deg Zap flaps, the raked tips also had small ailerons. The retractable undercarriage consisted of single main legs in the fuselage pods aft of the engines and a tail-wheel in the base of the fin.
Before flight trials began, the test pilot, M.A. Nyukhtikov, carried out many fast taxis to assess the handling of the unconventional DB-LK, one of which ended in an undercarriage collapse. Flight trials eventually got under way early in 1940 revealing an excellent performance, but with a high sensitivity to centre of gravity changes. Production was not authorised.
Specifications (DB-LK)
Data from Gunston, Bill. "Encyclopaedia of Russian Aircraft 1875–1995". London:Osprey. 1995. ISBN1-85532-405-9
General characteristics
Crew: 4
Length: 9.78 m (32 ft 1 in)
Wingspan: 21.6 m (70 ft 10.5 in)
Height: 3.65 m (11 ft 11.75 in)
Wing area: 56.87 m2 (612 sq ft)
Empty weight: 6,004 kg (13,236 lb)
Gross weight: 10,672 kg (23,528 lb)
Powerplant: 2 × M-88 , 708.41 or 745.70 kW (950 or 1,000 hp) each
Performance
Maximum speed: 488 km/h (303 mph, 263 kn)
Range: 2,900 km (1,800 mi, 1,600 nmi)
Service ceiling: 8,500 m (27,890 ft)
Rate of climb: 6.15 m/s (1,210 ft/min)
Armament
4 × 7.62mm ShKAS machine guns; one pair to each tailcone.
2 × 7.62mm ShKAS machine guns; fixed, forward firing, in the wing centre section leading edge.
See also
Aircraft of comparable role, configuration, and era
belyayev, dahl, bombardirovshchik, long, range, bomber, flying, wing, bomber, aircraft, designed, built, ussr, 1939, lkrole, bombernational, origin, ussrmanufacturer, viktor, nikolayevich, belyayevdesigner, viktor, nikolayevich, belyayevfirst, flight, 1940numb. The DB LK Dahl niy Bombardirovshchik LK long range bomber flying wing was a bomber aircraft designed and built in the USSR in 1939 DB LKRole BomberNational origin USSRManufacturer Viktor Nikolayevich BelyayevDesigner Viktor Nikolayevich BelyayevFirst flight 1940Number built 1 Contents 1 Development 2 Specifications DB LK 3 See also 4 References 5 Sources 6 External linksDevelopment EditViktor Nikolayevich Belyayev had an illustrious early career with TsAGI AVIAVnito Aeroflot OMOS AGOS KOSOS and the Tupolev OKB He also designed and built several gliders from 1920 including flying wing designs and in 1934 he designed a transport aircraft with twin tail booms each accommodating ten passengers Belyaev developed the twin boom idea into the twin fuselage DB LK which had two short fuselages either side of a very long chord wing centre section with the outer wing sections swept forward 5 deg 42 min tapering at 7 1 out to raked back tips A large fin and rudder on a short central boom carried a small tailplane with very large elevators The airframe was of light alloy stressed skin construction with five spar wings covered with sheet aluminium alloy Each fuselage pod carried a single M 88 engine in a long chord cowling driving a three bladed VISh 23D propeller as well as a pilot navigator cockpit and radio operator gunner station in each of the extensively glazed tail cones The outer wings had slats ailerons and 45deg Zap flaps the raked tips also had small ailerons The retractable undercarriage consisted of single main legs in the fuselage pods aft of the engines and a tail wheel in the base of the fin Before flight trials began the test pilot M A Nyukhtikov carried out many fast taxis to assess the handling of the unconventional DB LK one of which ended in an undercarriage collapse Flight trials eventually got under way early in 1940 revealing an excellent performance but with a high sensitivity to centre of gravity changes Production was not authorised Specifications DB LK EditData from Gunston Bill Encyclopaedia of Russian Aircraft 1875 1995 London Osprey 1995 ISBN 1 85532 405 9General characteristicsCrew 4 Length 9 78 m 32 ft 1 in Wingspan 21 6 m 70 ft 10 5 in Height 3 65 m 11 ft 11 75 in Wing area 56 87 m2 612 sq ft Empty weight 6 004 kg 13 236 lb Gross weight 10 672 kg 23 528 lb Powerplant 2 M 88 708 41 or 745 70 kW 950 or 1 000 hp eachPerformance Maximum speed 488 km h 303 mph 263 kn Range 2 900 km 1 800 mi 1 600 nmi Service ceiling 8 500 m 27 890 ft Rate of climb 6 15 m s 1 210 ft min Armament 4 7 62mm ShKAS machine guns one pair to each tailcone 2 7 62mm ShKAS machine guns fixed forward firing in the wing centre section leading edge See also EditAircraft of comparable role configuration and era Belyayev BabochkaRelated lists List of aircraftReferences EditSources EditGunston Bill The Osprey Encyclopaedia of Russian Aircraft 1875 1995 London Osprey 1995 ISBN 1 85532 405 9External links Edit Wikimedia Commons has media related to Belyaev DB LK DB LK on the Sky Corner DB LK on Dieselpunks Archived 2015 05 08 at the Wayback Machine Retrieved from https en wikipedia org w index php title Belyayev DB LK amp oldid 1114497116, wikipedia, wiki, book, books, library,
