Bratukhin B-5 (original) (raw)

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Bratukhin B-5
Bratukhin B-5 conducting a test flight
Role Transport helicopterType of aircraft
National origin Soviet Union
Manufacturer Bratukhin
First flight 1947
Number built 1 (B-5)1 (B-9)1 (B-10)
Variants Bratukhin B-11

The Bratukhin B-5 was a prototype Soviet transverse rotor helicopter designed by the Bratukhin aircraft design bureau.[1]

The B-5 was an improved and larger design based on the bureau's earlier G-4, a twin-rotor helicopter, with each rotor driven by an Ivchenko AI-26 radial engine.[1] Each engine was housed in a pod on an outrigger with the related rotor above.[1] The programme was delayed waiting for appropriate engines and the B-5 was not completed until 1947, it only made a few short hops before the programme was abandoned due to vibration and structural flexing.[1][2]

An air ambulance variant, the Bratukhin B-9 was built but was abandoned without being flown.[2][3] Another variant was the Bratukhin B-10 which had uprated 575 hp (429 kW) engines and was modified for use in the artillery observation role with the military designation VNP (Vosdushnii Nabludatelnii Punk - Aerial Observation Point).[2] The B-10 had three-seat for the crew, the cabin could hold three passengers or equipment. The B-10 flew in 1947 but although it did not have the wing stiffness problems of the B-54, demonstrating adequate handling like the B-5 and B-9 was also abandoned.[2][3] A variant with an improved performance was built as the Bratukhin B-11.[2]

B-5

Prototype, one built.

B-9

Prototype air ambulance variant, one built.

B-10

Prototype observation and reconnaissance variant, one built.

Specifications (B-10)

[edit]

Data from [4]

General characteristics

Performance

Related development

Related lists

  1. ^ a b c d Orbis 1985, p. 839
  2. ^ a b c d e Nemecek 1986, pp. 385-386
  3. ^ a b Gunston 1995, p.64.
  4. ^ Nemecek 1986, pp. 438-439