Polish Aviation Museum

31-864 Kraków,
al. Jana Pawła II 39
phone: (12) 640 99 60,
(12) 642 40 70
e-mail: info@muzeumlotnictwa.pl

a cultural institution of the Malopolska Region

Małopolska – Kraków Region


Mecenas Muzeum

Kraków Airport

Instytut Techniczny Wojsk Lotniczych - sponsor restauracji samolotu Caudron  CR.714 Cyclone


Patroni Medialni

Skrzydlata Polska



Helicopter: WSK SM-2

WSK SM-2
USSR / Poland
utility helicopter
1959



  • Technical data


Rotor diameter 14.34 m (47 ft)
Fuselage length 12.08 m (39 ft 7 in)
Take-off weight
Maximum speed 2,493 kg (5,496 lb)
Ceiling 3,500 m (11,500 ft)
Range 310 km (193 mi / 167 NM)
Armament
Powerplant :
7-cylinder radial engine Lit-3 rated at 575 hp

 

After starting production of the SM-1, a team of Polish designers led by J. Tyrcha began in 1957–1959 to design an improved version, called the SM-2. Attention was paid to the overpowered engine, which could allow the helicopter to carry more load. An entirely new fuselage with a comfortable cockpit, accommodating four passengers and one pilot, was designed. A stretcher could be loaded in through the open front fuselage. Wide sliding doors on both sides made stepping in and out easier and allowed for rescue operations. A big glassed nose ensured excellent visibility. The engine, rotor, tail boom, steering rotor and undercarriage were borrowed from the SM-1.

During service, a drop in performance was noticed. After tests, it was shown that the reason was an engine power drop. It was caused by the carburettor air intake, sucking hot air from the cooling system. 85 SM-2 examples were produced. Some were exported to Czechoslovakia. The Polish Air Force bought 80 examples. A few were still in service as air ambulances as late as 1979.

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