Data on design, manufacture and status


Primary flight and mechanical characteristics

VTOL type: Helicopter

Lift configuration: Single main rotor

Dedicated control device: Tail rotor

Crew required: 2

Crew seating: Not applicable

Landing gear: Wheels (all retractable)

Layout and Dimensions

Data on aircraft size

Tricycle retractable landing gear. This was Sikorsky's first helicopter with fully retractable wheels.

Overall Dimensions
Overall Height: 6.71 m 22.0 ft
Overall Length: 26.82 m 88.0 ft
Overall Width: 21.95 m 72.0 ft
Airframe Dimensions
Airframe Length: 22.06 m 72.4 ft
Airframe Width: 8.33 m 27.3 ft
Airframe Height: 5.23 m 17.2 ft
Landing Gear Dimensions
Landing Gear Base: 11.25 m 36.9 ft
Landing Gear Track: 6.02 m 19.8 ft
Cabin Dimensions
Cabin Internal Height:  
Cabin Internal Length:  
Cabin Internal Width: 2.74 m 9.0 ft

Weights and Performance

Data on aircraft weight and flight characteristics

Performance data quoted is with wide-chord main rotor blades.

Max Gross Weight (ground): 14,061 kg 31,000 lb
Max Gross Weight (airborne):  
Max Take-off Weight: 14,061 kg 31,000 lb
Empty Weight: 9,752 kg 21,500 lb
Useful Load: 4,309 kg 9,500 lb
Empty Weight Fraction: 0.694
Climb Performance
Max Rate of Climb: 9 m/s 1,705 fpm
Hover Performance
Hover Ceiling IGE:  
Hover Ceiling OGE:  
Max Level Flight Speed:  
Never Exceed Speed: 241 km/h 130 kts
Service Ceiling: 2,652 m 8,700 ft
Range and Endurance
Max Range:  
Max Endurance:  

Engine Details

Aircraft powerplant (lift and/or propulsion)

Provided powerplant data is for uninstalled, sea level, static operations.

Number of engines: 2
Designation: P&W R-2800-50 reciprocating
Manufacturer: Pratt & Whitney
Normal Ratings
Max continuous:  
Take-off / rated: 1417 kW 1899 hp
OEI Ratings
OEI contingency:  
OEI continuous:  
OEI 30-second:  
OEI intermediate:  

Primary Lift Device

Data on primary lift devices such as main rotors

Originally fitted with blades using the NACA 0012 airfoil, higher-performing wide-chord blades using the NACA 0010.9 airfoil were retrofitted across all models.

Main Rotor Characteristics
Diameter: 21.95 m 72.00 ft
RPM: 184.0 rpm 184.0 rpm
Direction of Rotation: Unknown
Hub Type: Fully articulated main rotor head with a 24-inch offset flapping hinge
Main Rotor Blade Characteristics
Blade Construction: Hollow extruded aluminum spar with 27 honeycomb filled, aluminum skinned pockets bonded to the spar, with steel cuffs.
Blade Chord: 0.601 m 1.97 ft
Blade Tip Geometry: Square tips
Blade Twist: -0.140 rad -8.000 deg
Number of Blades: 5
Main Rotor Derived Characteristics
Disc Area: 378.25 m² 4071.6 ft²
Disc Loading: 37.17 kg/m² 7.614 lb/ft²
Solidity: 0.0871
Main Rotor Blade Derived Characteristics
Blade area per blade: 6.59 m² 71.0 ft²
Tip Speed: 211.43 m/s 693.7 fps

Primary Control Device

Data on primary control devices such as tail rotors

Tail Rotor Characteristics
Diameter: 4.57 m 15.00 ft
Configuration: Pusher
Direction of Rotation: Top blade fwd
Tail Rotor Blade Characteristics
Number of Blades: 4
Blade Construction: All metal (aluminum)
Blade Chord: 0.343 m 1.13 ft
Blade Twist: -0.17 rad -10.0 deg
Tail Rotor Derived Characteristics
Disc Area: 16.42 m² 176.7 ft²
Solidity: 0.1910
Tail Rotor Blade Derived Characteristics
Tip Speed:  
Blade Area (per blade): 0.784 m² 8.44 ft²

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Related Public Resources

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