Yakovlev EG
Yakovlev · Soviet Union · first flew 1947 · helicopter
The Yakovlev EG (Eksperimentalnyi Gelikopter) was an experimental helicopter with coaxial rotors, also known as the Yak-M11FR-1 and Sh (Shootka).
Recognition (WEFT)
| W — Wings | High-mounted, rotary |
|---|---|
| E — Engines | 1 × piston, fuselage-mounted |
| F — Fuselage | 6.53 m fuselage |
| T — Tail | Twin fin |
WEFT is AircraftIQ's four-point recognition method — how it works.
Spot it by:
- Two contra-rotating coaxial two-bladed rotors on a single pylon
- Pilot and passenger side by side under a glazed canopy with a car-style door on each side
- Fixed tricycle undercarriage on steel tube trusses
A small coaxial helicopter with a radial M-11FR engine behind the gearbox and, initially, a tailplane with twin endplate fins.
Specifications
- The Yakovlev EG has a length of 6.53 m (21 ft).
- It has a wingspan of 10 m (33 ft).
- Its maximum speed is 150 km/h (93 mph).
- Typical crew: 2.
Figures are for the representative variant described above; marks differ. See how AircraftIQ sources figures.
History
The prototype was first flown by V.V. Tezavrovsky in December 1947. The fuselage was a welded steel tube truss with duralumin skinning forward and fabric aft.
Variants
Early in 1948 the M-11FR engine was replaced by a 190 hp M-12, which proved troublesome, so an M-11FR was refitted to finish the flight trials by 8 July 1948.
Where you'll see it
Testing showed vibration at forward speeds above 20-30 km/h. To reduce it, the tailplane and its twin endplate fins were removed.
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