| Technical data | |
|---|---|
| Type | 5-EA |
| Function | experimental |
| Year | 1933 |
| Crew | 1 |
| Engines | 2*120hp M-2 |
| Length | - |
| Rotor diameter | 12.0m 7.8m |
| Height | - |
| Empty weight | 1047kg |
| Flight weight | 1210kg |
| Ceiling | 40m |
| Minimum Speed | - |
| Maximum Speed | 20km/h |
| 360° turn | - |
| Takeoff roll | - |
| Landing Roll | - |
| Flight Duration | 0.7h |
| Range | - |
5-EA, TsAGI/ I.P.Bratukhin
Construction of this helicopter was similar to 1-EA and 3-EA, but the main rotor was radically redesigned (by I.P.Bratukhin). It became a combination of two 3-blade rotors of different diameters: the bigger one had fixed blades, the smaller one was used for aircraft control. Large rotor blades could change pitch all together to provide vertical evaluations. Smaller rotor was the fully instrumented one.
Was flown many times during 1933- 1935, mostly to study behavior of the bigger 'lift' rotor.
One built.
| Predecessors | Modification | |
|---|---|---|
 1-EA |
3-EA |
 11-EA |
Sources [6], Vol.2 p.417;
