The Moskalyev SAM-25 was an early 1940s
Soviet, military assault transport, the last of a series of developments of the successful
Moskalyev SAM-5
The Moskalyev SAM-5 was a 1930s Soviet transport or air ambulance monoplane designed by Aleksandr Moskalyev. The type served in small numbers in the Second World War as an air ambulance.
Development and design
The SAM-5 was a cantilever high-w ...
.
Design and development
The single engine,
high wing
A monoplane is a fixed-wing aircraft configuration with a single mainplane, in contrast to a biplane or other types of multiplanes, which have multiple planes.
A monoplane has inherently the highest efficiency and lowest drag of any wing confi ...
Moskalyev SAM-5bis-2 was a 1934 light transport developed into four more different types, of which the SAM-25 was the last. Apart from having a more powerful engine, it was an updated and refined version of the original.
[
It had the same high-set, wooden, two spar, cantilever wing as the SAM-5bis-2, with ply-skin ahead of the forward spar forming a torsion resistant box. The whole surface, including the ply-skinned leading edge, was fabric covered. The SAM-25's wings introduced drooping ailerons, slotted automatic slotted flaps and automatic slats.][
It was powered by a nose-mounted ]Shvetsov M-11F
The Shvetsov M-11 is a five-cylinder air-cooled radial aircraft engine produced in the Soviet Union between 1923 and 1952.Gunston 1989, p.158.
Design and development
The Shvetsov M-11 was designed under a 1923 competition in the Soviet Union fo ...
five cylinder, radial engine, installed with its cylinders largely exposed for cooling. As in the earlier versions, the fuselage had a wooden girder structure. The pilot's enclosed cockpit was ahead of the wing leading edge and the cabin was behind him under the wing. Its port side had a central entry door with one window ahead of it and entry door/stretcher hatch/photography window aft. Behind the cabin the fuselage narrowed to the SAM-5bis-2-style tail, with a blunted triangular fin and more rounded rudder, though the latter was now fuller, with trim tabs. A blunted triangular plan tailplane was mounted on top of the fuselage and carried rounded, tabbed elevators, separated for rudder movement.[
Like the SAM-14, the SAM-25 had fixed, wide-splayed cantilever landing gear, each side with a landing leg and drag strut within a common fairing.][
]
Operational history
It was evaluated from mid 1943. There has been some debate about production: later post-war evidence suggests there were no wartime machines but there was post-war series production from 1946 for Aeroflot
PJSC AeroflotRussian Airlines (russian: ПАО "Аэрофло́т — Росси́йские авиали́нии", ), commonly known as Aeroflot ( or ; russian: Аэрофлот, , ), is the flag carrier and the largest airline of Russia. The ...
.[
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Specifications
References
{{Moskalyev aircraft
Single-engined tractor aircraft
High-wing aircraft
1940s Soviet military utility aircraft
Moskalyev aircraft