Sikorsky S-50

S-50
Role	Light observation helicopter
Manufacturer	Sikorsky
Developed from	Sikorsky R-6

The Sikorsky S-50 was a smaller lighter version of the Sikorsky R-6 designed for the United States Army Air Corps as an observation helicopter with dual controls in 1943. The design emphasized minimal weight and was to be powered by a 150 hp (112 kW) Franklin 6ACV-298 engine turning a three blade main rotor constructed of metal and plywood covered by 2 layers of fabric. The tail rotor also had three blades made from laminated wood. Further weight savings of the design included the rejection of a conventional oleo strut tail wheel in favor of a tail skid on a pivot cushioned by three rubber doughnuts. One full scale wooden mock-up was built but no flying examples were ever produced.[1]

Specifications

Data from Sikorsky Archives[1]

General characteristics

Crew: 1
Capacity: 1 pax or 400 lb (180 kg) max payload
Length: 40 ft 4 in (12.3 m)
Empty weight: 1,050 lb (476 kg)
Max takeoff weight: 3,197 lb (1,450 kg)
Powerplant: 1 × Franklin 6ACV-298 6-cyl. vertically mounted air-cooled horizontally-opposed piston engine, 150 shp (110 kW)
Main rotor diameter: 29 ft 10 in (9.1 m)
Main rotor area: 2,801 sq ft (260.2 m²) 3-bladed NACA 0012 composite wood/metal construction with fabric covering

Performance

Maximum speed: 119 mph (191 km/h, 103 kn)
Range: 250 mi (400 km, 220 nmi)
Service ceiling: 16,000 ft (4,900 m)
Rate of climb: 1,400 ft/min (7.1 m/s)

References

Vinny Devine (October 2013). "S-50". sikorskyarchives.com. Sikorsky Archives. Retrieved 21 May 2017.

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[sik-1] Vinny Devine (October 2013). "S-50". sikorskyarchives.com. Sikorsky Archives. Retrieved 21 May 2017.

Sikorsky aircraft
Fixed-wing aircraft (company designations)	S-1 S-2 S-3 S-4 S-5 S-6 S-7 S-8 S-9 S-10 S-11 S-12 S-13 S-14 S-15 S-16 S-17 S-18 S-19 S-20 S-21 S-22 S-23 S-24 S-25 S-26 S-27 S-28 S-29-A S-30 S-31 S-32 S-33 S-34 S-35 S-36 S-37 S-38 S-39 S-40 S-41 S-42 S-43 VS-44 S-45
Fixed-wing aircraft (military designations)	C-6 C-28 JRS JR2S PS RS XBLR-3 XPBS XSS XV-2
Helicopters (company designations)	VS-300 (S-46) S-47 S-48 S-49 S-50 S-51 S-52 S-53 S-54 S-55 S-56 S-57 S-58 S-59 S-60 S-61 S-61L/N S-61R S-62 S-63 S-64 S-65 S-66 S-67 S-68 S-69 S-70 S-71 S-72 S-73 S-74 S-75 S-76 S-80 S-92 S-97 S-100 S-300 S-333 S-434
Helicopters (military designations)	SH-3 HH-3E/F R-4 H-5 H-6 H-18 H-19 H-34 CH-37 XH-39 HH-52A CH-53 CH-53E CH-53K MH-53 CH-54 UH-60 HH-60G HH-60J/MH-60T MH-60R/S SH-60B/F H-60J/K VH-60 RAH-66 VH-92 CH-124 CH-148 HLH
Experimental aircraft	Cypher/Cypher II Firefly Raider Raider X SB-1 X2 XBLR-3 XV-2