Sikorsky S-52 H-18 HO5S


Sikorsky S-52 H-18 HO5S

First all-metal rotor blades helicopter in US. First flight February 12, 1947. 93 units built serving with the Marines and USCG and after retirement many introduced into the civilian market by Orlando Helicopters who acquired the parts inventory from Sikorsky.

In 1949, the S-52 was the first ever helicopter to loop and roll (See videos)


Engine: 1 x Franklin O-425-1 245 shp
Capacity: 2 + 2
Length: (m) 11.95
Height: (m) 3
Blades: 3
Rotor diam.: (m) 10
Disc area: (m2) 78
Weight: (kgs) Empty: 750     Max: 1225
Speed: (km/h) Cruise: 150     Max: 175
Range: (km) 600
Ceiling: (m) 4700
Rate/Climb: (m/min) 395

Derivatives & Versions

S-52-1 1949 Civilian 4-place utility helicopter, 3 built.
S-52-2 1950 Improved 4-place utility helicopter, 1 built. Later converted to S-59 turbine powered prototype.
HO5S-1 1952 Improved 4-place light observation and utiliy helicopter for USMC, 79 built.
HO5S-1G 1952 Utility version of HO5S-1 for USCG, 8 built.
YH-18 1952 Utility observation helicopter for US Army, 4 built. Two modofied into S-59 / XH-39 turbine powered prototypes.
S-52-3 1954 Civil designation for 4 place light observation and utiliy helicopter equivalent to military HO5S-1.
S-59 XH-39 1954 US Army's first turbine-powered helicopter, developed from the S-52. Rejected in favor of the Bell 204 (UH-1 Iroquois)

List of Operators of Sikorsky S-52 H-18 HO5S

From Organisation with model S-52 H-18 HO5S
usa US Coast Guard
    8 1952/??
usa US Marine Corps
    79 1952/??

Construction Numbers on database of S-52 H-18 HO5S or its versions


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