BRATUKHIN G-4

Equipado con motores nacionales AI-26GR, el G-4 era un poco más grande que el G-3. El primer G-4 voló en octubre de 1947 con el piloto M.K.Bajkalov, siendo capaz de volar con un motor cortado, y aterrizar en autorrotación. El primer prototipo no superó las expectativas; el segundo prototipo, con un rotor mejorado alcanzó los logros previstos y superó los tests propuestos. Dos prototipos y cuatro de serie fueron construidos.

Equipped with domestic AI-26GR, the G-4 was slighty bigger than the G-3. The first G-4 was flight-tested in October 1947 by test-pilot M.K.Bajkalov. The helicopter was capable of horizontaly flight with one engine inoperative, and landing safely in autorotation. The first prototype did not meet expectations (some calculated parameters were not reached). As a result of incomplete pilot instructions, it was crashed. The second prototype with improved rotor balde profile passed the extended test program without problems. Gliding (autorotation) rate was 12m/sec, with gliding angle ~16degree. In this case landing speed was 80-90km/h with 10-15m roll. Powerplant and rotors passed 100 hours resouce test (first time in the USSR).Two prototypes and four series.

"History of aircraft construction in the USSR" by V.B.Shavrov
English translation by A.Savine (Correction by David Bonar)

Characteristics Características	Information Información	Characteristics Características	Information Información
First Flight Primer Vuelo	1947	Engine Motor	2 AI-26GR
Seating Capacity Plazas	1 / 1	Power Potencia	500 HP
Empty Weight Peso Vacío	2364 Kg	Hover Ceiling O.G.E. Estacionario O.G.E	Ft
Maximum Weight Peso Máximo	3002 Kg	Hover Ceiling I.G.E. Estacionario I.G.E	7200 Ft
Vel. Cruise Vel. crucero	KT	Service Ceiling Techo de Servicio	Ft
V.N.E. V.N.E	80 Kts	Maximum Range (Std) Alcance (Std)	125 NM