Sikorsky S-58T
The Sikorsky S-58T is a turbine conversion of the S-58, a helicopter originally powered by a large radial piston engine. Replacing that engine with a pair of PT6 turboshafts made the venerable airframe lighter, more reliable, and noticeably more capable in hot or high conditions. The conversion extended the working life of many former military and offshore helicopters. Its long nose and high cabin still reveal the S-58’s 1950s origins despite the modernised powerplants.
Did you know?
The S-58T is a turbine re-engine of the 1950s S-58, extending the airframe's working life well beyond its original piston-powered design.
Specifications
| Length | 14.3 m (47 ft) |
|---|---|
| Height | 4.1 m (13 ft) |
| Rotor diameter | 17.1 m (56 ft) |
| Maximum passengers | 12 |
| Persons on board | 18 |
| Crew | 2 |
| Maximum take-off weight | 5.9 t |
| Range | 250 NM (463 km) |
| Maximum speed | 120 kt (222 km/h) |
| Service ceiling | 14,000 ft (4,267 m) |
| Optimum ceiling | 6,000 ft (1,829 m) |
| Rate of climb | 1,100 ft/min (5.6 m/s) |
| Engines | 2x Pratt & Whitney Canada PT6T-3 |
| Units built | 150 |
Curated by CatchFlights from manufacturer documents, ICAO Doc 8643 and reference works; values are left out where no source could confirm them. Sources are listed on our credits page.
In CatchFlights
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