Sikorsky S-58 H-34

1954










Sikorsky S-58 H-34

S-58 H-34
Sikorsky began work on the S-58 in 1951 as a general purpose utility machine and as a more capable anti-submarine platform for the US Navy, to follow the S-55. It differed principally in a larger cabin area directly under the main gearbox - still driven by an oblique shaft from the nose mounted engine - the considerably more powerful R-1820-84 piston radial. It had a 4 bladed main rotor, a lower level foldable boom on which was mounted the port-side 4 bladed tail rotor and a tripod undercarriage (with tail wheel). It first flew in prototype on 8 Mar 1954 and the first production airframe flew on 20 Sep 1954.


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Specifications


Engine: 1 x Wright R-1820 1000shp
Capacity: 2 + 18
Length: (m) 17.27
Height: (m) 4.36
Blades: 4
Rotor diam.: (m) 17.07
Disc area: (m2) 228.54
Weight: (kgs) Empty: 3500     Max: 5900
Speed: (km/h) Cruise: 156     Max: 198
Range: (km) 400
Ceiling: (m) 2900
Rate/Climb: (m/min)
blueprints

Derivatives & Versions


ModelYearHistory
XHSS-1 1953 Sikorsky S-58 prototype anti-submarine helicopter desigmated XHSS-1 by USN. Four built.
HSS-1 / SH-34G Seabat 1954 Sikorsky production S-58 for anti-submarine warfare, desgnated HSS-1 / SH-34G by USN.
HUS-1 / UH-34D Seahorse 1954 HUS-1/UH-34D Seahorse was the utility version of the HSS-1/SH-34G Seabat with early bent leg / torsion bar undercarriage. Production began in 19 ...
CH-126 Choctaw 1955 Sikorsky S-58B (H-34A) in Canadian service
H-34A Choctaw 1955 US Army variant. Conversions to H-34C. Redesignated CH-34A in 1962. Many transferred to South Vietnam Air Force and Thailand.
S-58B 1955 Commercial/Export designation for H-34B (Basic H-34A with detail changes)
HUS-1L / LH-34D 1956 Factory winterized version of HUS-1 used by VXE-6 for Operation DEEP FREEZE support in Antartica. Seven produced.
SA S-58 1956
S-58C 1956
H-34G.I 1957
HSS-1F / SH-34H 1957 Sikorsky HSS-1 fitted with two GE YT-58 turbine engines as test bed for HSS-2 prototype. Redesignated SH-34H in Oct62.
HUS-1A / UH-34E 1957 Basic HUS-1 but equipped with amphibious pontoons. They can also carry an external fuel tank. Re-designated UH-34E in 1962
HUS-1Z / VH-34D Seahorse 1957
VH-34A/C Choctaw 1957
HSS-1N / SH-34J Seabat 1958 Night/Bad weather version of the HSS-1 with improved avionics and autopilot, re-designated SH-34J in 1962
Many airframes later converted to UH-34J by removal of ASW gear.
Westland Wessex 1958 the sikorsky s-58 (ff 8 mar 1954) entered usn service late 1955 as the hss-1. this looked a good bet for the uk admiralty, which had been searchi ...
H-34G.II 1959
HH-34F Seahorse 1959 Original designated HUS-1G, search & rescue version of HUS-1 / UH-34D Seahorse for US Coast Guard. Six built
CH-34C Choctaw 1962 Improved H-34A for US Army and export under MDAP.
UH-34G Seabat 1962 Conversion of HSS-1 / SH-34G by US Navy into utility version by removing ASW equipment.
H-34G III 1963
S-58D 1964
S-58T 1970 First flight on August 1970, the S-58T is an old airframe converted to turboshaft power using different versions of the Pratt & Whitney Canada ...
HH-34J Choctaw 1971 Former US Navy aircraft transferred to AFRES rescue squadrons


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