The(project designation “T”) is a Soviet bomber aircraft of the . The abbreviation NB stands for Notschnoi Bombardirowschtschik (Ночной бомбардировщик), night bomber.
Nikolai Polikarpov began in 1942 with the construction works for a twin-engined medium bomber. The type has been configured as a wing monoplane wood-metal composite construction and should be able to carry 3000 to 5000 Kilogramm bombs. As the drive for the serial production ASch-71 engines of 2,000 hp with Arkady Shvetsov starting power were provided. The fuselage nose had a generous glass. The tail unit consisted of two vertical stabilizers at the ends of the horizontal stabilizer. The tail wheel landing gear was fully retractable main wheels drove it into the engine nacelles. On the fuselage was a rotating defensive stand, another was housed in a glazed floor pan.
In autumn 1943, the project phase was completed and the construction of the prototype began. He received two ASch-82A engines and drive. The first flight took place in May 1944. Subsequent testing showed satisfactory performance and was completed in August of the same year. Nevertheless, the NB did not go into mass production because the demand for twin-engine bombers were covered sufficiently by the Pe-2 and Tu-2.
Concept Medium-duty night bomber
Designer/constructor Nikolai Polikarpov
Manufacturer Polikarpov OKB
Year (s) 1943-1944
Span 21.52 m
Engine (s) two twin radial engines ASch-82A
Starting power per 1,430 hp
Empty Weight 6747 kg
Off mass 14,640 kg
Maximum speed 515 km / h at 6,250 m altitude
Ceiling 8,800 m
Reach normal 2195 km
maximum of 3029 km
Weapons a movable 12.7 mm UBT machine gun in the bow
a movable 12.7 mm UBT machine gun in the back as defense
a portable 12.7-mm MG UBS in floor pan
two rigid MG in the wings
load maximum of 5000 kg
Twin engine aircraft