Tupolev TB-6

Tupolev TB-6 (internal designation ANT-26; Russian: Туполев ТБ-6/АНТ-26) was a proposal for a 1930s heavy bomber that did not advance beyond blueprints. Inspired by the success of ANT-20/PS-124, Tupolev in 1929 began work on an even larger aircraft powered by 12 engines and with a takeoff weight of 70 tons (155,000 lb). A 1/20 scale two-seat glider was built and test-flown to evaluate the aerodynamic soundness of the design and work was started on the first prototype. By mid-1930s, the trend in military aviation shifted towards smaller and faster aircraft and TB-6 was canceled. ANT-28 was a proposed cargo version.

Read more about Tupolev TB-6:  Specifications (TB-6)

Other related articles:

Tupolev TB-6 - Specifications (TB-6)
... General characteristics Crew 17 Length 39 m (127 ft 11 in) Wingspan 95 m (311 ft 8 in) Height 10 m (32 ft 9.7 in) Wing area 800 m² (8611.1 ft²) Empty weight 50,000 kg (110,231 lb) Loaded weight 70,000 kg (154,324 lb) Powerplant 12 × Mikulin AM-34FRN V12 engines, 671 kW (900 hp) each Performance Maximum speed 300 km/h (162 kn, 186 mph) (estimated) Wing loading 88 kg/m² (18 lb/ft²) Power/mass 115 W/kg (0.07 hp/lb) Armament Guns 1 x 37-millimeter (1.5 in) cannon 4 x 20-millimeter (0.79 in) ShVAK cannons 1 x 7.62-millimeter (0.300 in) DA machine gun 4 x 2 7.62-millimeter (0.300 in) ShKAS machine guns Bombs 15,000 kg (33,000 lb) normal load, 24,600 kg (54,000 lb) max. ...