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Sikorsky HO5S-1 / S-52 -3 helicopter

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Specifications Comment this helicopter
Picture HO5S-1__S-52-3
General
Manufacturer Sikorsky
Type HO5S-1 / S-52 -3
Introduced 4/1/1951
In production? No
Units produced 93
Price US $ 0.00
Dimensions
Overall Length 39.2 ft
Length 28.8 ft
Height 9.8 ft
Width 0 ft
   
   
Description

The S-52 (aka HO5S-1) helicopter was a utility helicopter developed by Sikorsky Aircraft in the late 1940s.

The design process for the S-52 began near the end of 1945. The first prototype flew a mere two years later in 1947. The S-52 was created because of a need for a utility helicopter in the Navy, Marines and Coast Guard. All three of whom adopted this model into their respective fleets.

The S-52 is remarkable for being the very first US helicopter with all-metal rotor blades. These gave it significant performance advantages at the time. The S-52 set numerous speed and aerobatic records. It is widely believed that this is the first ever helicopter to be successfully looped.

The S-52 used a downward-sloping (or “anhedral”) v-tail stabilizer. It had sliding doors on both sides. One fore on the starboard side and one aft on the port side. It also had a novel vertically split front bubble that allowed the port half to swing open.

The prototype was a two-seater, but later production models had three or four seats.

The engine was situated aft and canted forward by 30 degrees in order to mate it with the drivetrain. In the two-seater prototype the engine was an air-cooled Franklin flat-six that put out a scant 178 horsepower. Later version would stick to a Franklin engine, but up the power to 245 horsepower.

The S-52 would later serve as a basis for the S-59 turbine powered helicopter.

The helicopter was operated by the US Navy as a utility craft and by the Marine Corps for observation missions in Korea. The US Army evaluated four units, but never ordered them in quantity.

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Design features
  • All metal rotor blades
  • Semi-monocoque fuselage
  • Quadricycle fixed landing gear
  • Pod-and-boom arrangement
Description

The S-52 (aka HO5S-1) helicopter was a utility helicopter developed by Sikorsky Aircraft in the late 1940s.

The design process for the S-52 began near the end of 1945. The first prototype flew a mere two years later in 1947. The S-52 was created because of a need for a utility helicopter in the Navy, Marines and Coast Guard. All three of whom adopted this model into their respective fleets.

The S-52 is remarkable for being the very first US helicopter with all-metal rotor blades. These gave it significant performance advantages at the time. The S-52 set numerous speed and aerobatic records. It is widely believed that this is the first ever helicopter to be successfully looped.

The S-52 used a downward-sloping (or “anhedral”) v-tail stabilizer. It had sliding doors on both sides. One fore on the starboard side and one aft on the port side. It also had a novel vertically split front bubble that allowed the port half to swing open.

The prototype was a two-seater, but later production models had three or four seats.

The engine was situated aft and canted forward by 30 degrees in order to mate it with the drivetrain. In the two-seater prototype the engine was an air-cooled Franklin flat-six that put out a scant 178 horsepower. Later version would stick to a Franklin engine, but up the power to 245 horsepower.

The S-52 would later serve as a basis for the S-59 turbine powered helicopter.

The helicopter was operated by the US Navy as a utility craft and by the Marine Corps for observation missions in Korea. The US Army evaluated four units, but never ordered them in quantity.

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Design features:
  • All metal rotor blades
  • Semi-monocoque fuselage
  • Quadricycle fixed landing gear
  • Pod-and-boom arrangement
Performance
Persons 4
Max. Range 415 mi
Cruise Speed 96 mph
Max. Speed 110 mph
Max. rate of Climb 1300 ft/min
HOGE ceiling 5900 ft
Service Ceiling 15500 ft
Gross Weight 2700 lb
Empty Weigt 1650 lb
Useful Load 1050 lb
Dynamic system
Fuel Capacity 0 gallons
Number of Engines 1
Engine Type Piston
Engine Code Franklin 6V6-245-B16F
Horse Power 245
Rotorhead Articulated
Number of rotorblades 3
Rotor Diameter 33 ft
Number of tail rotorblades 2
Tailrotor Diameter 5.7 ft
Blueprints & model
Manufacturer Website manufacturer..
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