[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][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).

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.