TsAGI - BRATUKHIN 5-EA

La construcción de este helicóptero fue muy similar a la del 1-EA y del 3-EA, pero el rotor principal fue radicalmente rediseñado (por Bratukhin). Tenía una combinación de dos rotores de tres palas cada uno (configuración básica de rotor principal y de cola, más un rotor al frente). Se voló muchas veces en los años 1933-1935, principalmente con fines de estudio. Solo uno construido.

Construction of this helicopter was similar to the 1-EA and 3-EA, but the main rotor was radically redesigned (by Bratukhin). It had a combination of two 3-blade rotors of different diameters: the bigger one had fixed blades, while the smaller one was used for aircraft control. The large rotor blades could change pitch collectively to provide vertical control. The smaller rotor was fully controllable. The aircraft was flown many times during 1933-1935, mostly to study behavior of the bigger 'carrying' rotor. One was built.

"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	1933	Engine Motor	2 M-2
Seating Capacity Plazas	1	Power Potencia	120 HP
Empty Weight Peso Vacío	1047 Kgs	Hover Ceiling O.G.E. Estacionario O.G.E
Maximum Weight Peso Máximo	1210 Kgs	Hover Ceiling I.G.E. Estacionario I.G.E
Vel. Cruise Vel. crucero	11 Kts	Service Ceiling Techo de Servicio
V.N.E. V.N.E		Maximum Range (Std) Alcance (Std)	0.7 Hrs