Sikorsky S-58

Developed to a US Navy specification for anti-submarine helicopter and first flown 8 March 1954. Also built under license by Sud-Aviation in France, and by Westland in the UK as the Wessex. First commercial deliveries made in 1956. First flight of turbine-powered conversion 19 August 1970. Total built (including military); 1,821.

Specifications: S-58T
Accommodation: 2 + 12
Cargo/baggage: 2,460 kg (5,423 lb)
Max Speed: 120 kt (222 km/h)
Range: 260 nm (481 km)

Main rotor diameter: 17.1 m (56 ft 0 in)
Length (rotors turning): 17.3 m (56 ft 8 in)
Height: 4.9 m (15 ft 11 in)

Four-blade main rotor and four-blade portside tail-rotor; single Wright R-1820 piston engine or Pet W PT6T Twin-Pac turboshaft engines; High-mounted cockpit; three-wheel undercarriage.