Grigorovich M-4
Dmitry Grigorovich · Russia · first flew 1915 · reconnaissance aircraft
The Grigorovich M-4 was a Russian single-engined pusher biplane flying boat designed by Dmitry Grigorovich in 1915 for coastal patrol and reconnaissance duties with the Imperial Russian Navy over the Black Sea and Baltic.
Recognition (WEFT)
| W — Wings | Mid-mounted, straight |
|---|---|
| E — Engines | 1 × piston, nose-mounted |
| F — Fuselage | 8.6 m fuselage |
| T — Tail | Conventional |
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Spot it by:
- pusher biplane flying boat
- boat hull with open cockpits
- Imperial Russian Navy patrol aircraft
Single-engined pusher biplane flying boat with the engine and propeller mounted on the upper wing between the interplane struts, crew in open cockpits in the hull. Closely resembles the M-5 and M-9; the M-4 is smaller and has a less refined hull than the M-9.
Specifications
- The Grigorovich M-4 has a length of 8.6 m (28 ft).
- It has a wingspan of 13.6 m (45 ft).
- Its maximum speed is 105 km/h (65 mph).
- Typical crew: 2.
Figures are for the representative variant described above; marks differ. See how AircraftIQ sources figures.
History
Dmitry Grigorovich developed a series of M-class flying boats (M-1 through M-9 and beyond) during the First World War, drawing on Curtiss flying-boat technology and his own innovations. The M-4 was an early member of this family, powered by a single pusher engine mounted between the wings. While less famous than the later M-9, these boats equipped Russian naval aviation stations along both the Black Sea and Baltic coasts.
Variants
Part of the M-series family; succeeded by the more capable M-5 and M-9.
Where you'll see it
Operated by the Imperial Russian Navy for maritime patrol and reconnaissance from 1915; some aircraft survived into early Soviet naval service.
Related aircraft
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