Equipped with an Emergency Escape System, severing the rotor blades to allow the crew of the 3-place aircraft to escape topside; afterward, it enters the Airplane Configuration.

Hover flight is not possible; take-off and landings are STOL/CTOL.  In addition to the turbofan propulors, the main transmission and tail rotor are powered by General Electric T58-GE-5 / T58-GE-10 engines.  The equipped main rotor is that of the S-61 (H-3) while a conventional 5-blade tail rotor is used.

Overview

Data on design, manufacture and status

Design authority: Sikorsky Aircraft Corp.

Primary manufacturer: Sikorsky Aircraft Corp.

Parent type: Sikorsky S-72 RSRA

Aircraft status: No longer flying

Configuration

Primary flight and mechanical characteristics

VTOL type: Helicopter

Compound type: Lift and Thrust

Lift configuration: Single main rotor

Dedicated control device: Tail rotor

Dedicated propulsion devices: 2

Crew required: 2-3

Crew seating: Side-by-side

Landing gear: Wheels (some retractable)

Layout and Dimensions

Data on aircraft size

Note: Only the main wheels were retractable

Overall Dimensions
Overall Height: 4.72 m 15.5 ft
Overall Length: 23.14 m 75.9 ft
Overall Width: 18.90 m 62.0 ft
Airframe Dimensions
Airframe Length: 19.41 m 63.7 ft
Airframe Width: 13.72 m 45.0 ft
Airframe Height: 4.57 m 15.0 ft
Landing Gear Dimensions
Landing Gear Base: 11.56 m 37.9 ft
Landing Gear Track:  
Cabin Dimensions
Cabin Internal Height:  
Cabin Internal Length:  
Cabin Internal Width:  

Weights and Performance

Data on aircraft weight and flight characteristics

Weights
Max Gross Weight (ground): 11,884 kg 26,200 lb
Max Gross Weight (airborne):  
Max Take-off Weight: 11,884 kg 26,200 lb
Empty Weight: 9,440 kg 20,812 lb
Useful Load: 2,444 kg 5,388 lb
Empty Weight Fraction: 0.794
Climb Performance
Max Rate of Climb:  
Hover Performance
Hover Ceiling IGE:  
Hover Ceiling OGE:  
Limitations
Max Level Flight Speed: 556 km/h 300 kts
Never Exceed Speed:  
Service Ceiling:  
Range and Endurance
Max Range:  
Max Endurance: 1 hrs 1 hrs

Engine Details

Aircraft powerplant (lift and/or propulsion)

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

Powerplant
Number of engines: 2
Designation: GE TF34-GE-400A turbine
Manufacturer: GE Aviation
Normal Ratings
Max continuous:  
Take-off / rated:  
Intermediate:  
Maximum:  
OEI Ratings
OEI contingency:  
OEI continuous:  
OEI 30-second:  
OEI intermediate:  

Primary Lift Device

Data on primary lift devices such as main rotors

NACA 0012 airfoil; RPM (S-72 RSRA): 209.09

Main Rotor Characteristics
Diameter: 18.90 m 62.00 ft
RPM: 203.0 rpm 203.0 rpm
Direction of Rotation: Counterclockwise
Hub Type: Fully articulated
Main Rotor Blade Characteristics
Blade Construction:
Blade Chord: 0.464 m 1.52 ft
Blade Tip Geometry: Conventional
Blade Twist: -0.140 rad -8.000 deg
Number of Blades: 5
Main Rotor Derived Characteristics
Disc Area: 280.48 m² 3019.2 ft²
Disc Loading: 42.37 kg/m² 8.678 lb/ft²
Solidity: 0.0781
Main Rotor Blade Derived Characteristics
Blade area per blade: 4.38 m² 47.1 ft²
Tip Speed: 200.86 m/s 659.0 fps

Primary Control Device

Data on primary control devices such as tail rotors

Tail Rotor Characteristics
Diameter: 3.23 m 10.60 ft
Configuration: Pusher
Direction of Rotation: Top blade aft
RPM:  
Tail Rotor Blade Characteristics
Number of Blades: 5
Blade Construction:  
Blade Chord:  
Blade Twist:  
Tail Rotor Derived Characteristics
Disc Area: 8.20 m² 88.3 ft²
Solidity:  
Tail Rotor Blade Derived Characteristics
Tip Speed:  
Blade Area (per blade):  

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