Sikorsky S61L & S61N

  • CountryUnited States of America
  • TypeMedium lift utility helicopter
  • PowerplantsS61N Mk II - Two 1120kW (1500shp) General Electric CT581401 or 1402 turboshafts driving five blade main and tail rotors.
  • PerformanceS61N Mk II - Economical cruising speed 222km/h (120kt). Service ceiling 12,500ft. Hovering ceiling out of ground effect 8700ft. Range with max fuel and reserves 833km (450nm).
  • WeightsS61N Mk II - Empty 5595kg (12,336lb), max takeoff 8620kg (19,000lb). S61L Mk II - Empty 5,308kg (11,701lb).
  • DimentionsMain rotor diameter 18.90m (62ft 0in), length overall rotors turning 22.20m (72ft 10in), fuselage length 17.96m (58ft 11in), height 5.32m (17ft 6in). Main rotor disc area 280.5m2 (3019.0sq ft).
  • CapacityFlightcrew of two. Main cabin seating for up to 26 in early production aircraft and 30 in later production aircraft. Payloader can lift a 4990kg (11,000lb) external sling load.
  • ProductionProduction ceased in 1979 when 116 S61Ns and S61Ls had been delivered.

The Sikorsky S61n and S61l are focused around Sh3/S61a/B Sea King arrangement initially created in the late 1950s. They are two of the most broadly utilized air transport and oil apparatus help helicopters fabricated.

In September 1957 the US Navy recompensed Sikorsky an improvement contract to create a land and/or water capable hostile to submarine fighting helicopter equipped for recognizing and assaulting submarines. The model Sea King flew on March 11 1959, while generation conveyances occurred from September 1961. Power for beginning generation air ship was supplied by two 930kw (1250shp) General Electric T58ge8b turboshafts.

Advancement of a common rendition was attempted very nearly simultaneously, with the business S61l flying surprisingly on November 2 1961. While focused around the Sea King, the S61l is 1.27m (4ft 3in) more extended permitting it to convey a significant payload of cargo or travelers. Power for beginning generation S61ls was supplied by two 1005kw (1350shp) GE Ct58140 turboshafts, what might as well be called the T58.

Not at all like the Sea King, the S61l characteristics a changed arriving apparatus without buoy stabilizers. The overall indistinguishable S61n, which first flew on August 7 1962, holds the buoys, making it suitable for overwater operations, especially oil apparatus help. Both the S61l and S61n were in this manner redesigned to Mk II standard with enhancements including all the more effective Ct58110 motors giving better hot and elite, vibration damping and other point of interest refinements.

A third common advancement of the S61 arrangement to be offered was the Payloader, a stripped down machine streamlined for elevated crane work. The Payloader offers the settled undercarriage of the S61l, yet with a vacant weight just about 900kg (2000lb) short of what the standard S61n.

The S61 Shortsky is an exceptional abbreviated (1.6m/50in) transformation of the S61n and L, intended to build single motor execution and outer payload. The change first flew in February 1996.

Pictures of Sikorsky S61L & S61N