First flight on 27 Oct 2015 at Sikorsky's West Palm Beach, Florida Development Flight Center by aircraft EDM-1 (Engineering Development Model-1)


Data on design, manufacture and status

Design authority: Sikorsky Aircraft Corp.

Primary manufacturer: Sikorsky Aircraft Corp.

Parent type: Sikorsky CH-53K

Aircraft status: In development


Primary flight and mechanical characteristics

VTOL type: Helicopter

Lift configuration: Single main rotor

Dedicated control device: Tail rotor

Crew required: 1-2

Crew seating: Side-by-side

Landing gear: Wheels (all retractable)

Layout and Dimensions

Data on aircraft size

Overall Dimensions
Overall Height: 8.66 m 28.4 ft
Overall Length:  
Overall Width: 24.01 m 78.8 ft
Airframe Dimensions
Airframe Length: 22.29 m 73.1 ft
Airframe Width: 5.33 m 17.5 ft
Airframe Height:  
Landing Gear Dimensions
Landing Gear Base: 8.43 m 27.7 ft
Landing Gear Track: 3.91 m 12.8 ft
Cabin Dimensions
Cabin Internal Height: 2.00 m 6.6 ft
Cabin Internal Length: 9.10 m 29.9 ft
Cabin Internal Width: 2.70 m 8.9 ft

Weights and Performance

Data on aircraft weight and flight characteristics

Max Gross Weight (ground): 33,566 kg 74,000 lb
Max Gross Weight (airborne): 39,916 kg 88,000 lb
Max Take-off Weight: 33,566 kg 74,000 lb
Empty Weight:  
Useful Load:  
Empty Weight Fraction:  
Climb Performance
Max Rate of Climb:  
Hover Performance
Hover Ceiling IGE:  
Hover Ceiling OGE:  
Max Level Flight Speed: 315 km/h 170 kts
Never Exceed Speed:  
Service Ceiling:  
Range and Endurance
Max Range: 841 km 454 nm
Max Endurance:  

Engine Details

Aircraft powerplant (lift and/or propulsion)

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

Number of engines: 3
Designation: GE T408/GE38-1B turbine
Manufacturer: GE Aviation
Normal Ratings
Max continuous:  
Take-off / rated:  
OEI Ratings
OEI contingency:  
OEI continuous:  
OEI 30-second:  
OEI intermediate:  

Primary Lift Device

Data on primary lift devices such as main rotors

Main Rotor Characteristics
Diameter: 24.08 m 79.00 ft
Direction of Rotation: Counterclockwise
Hub Type:
Main Rotor Blade Characteristics
Blade Construction: Composite
Blade Chord: 0.900 m 2.95 ft
Blade Tip Geometry: 4th generation anhedral
Blade Twist:  
Number of Blades: 7
Main Rotor Derived Characteristics
Disc Area: 455.41 m² 4902.2 ft²
Disc Loading: 73.71 kg/m² 15.096 lb/ft²
Solidity: 0.1666
Main Rotor Blade Derived Characteristics
Blade area per blade: 10.84 m² 116.6 ft²
Tip Speed:  

Primary Control Device

Data on primary control devices such as tail rotors

Tail Rotor Characteristics
Diameter: 6.10 m 20.00 ft
Configuration: Pusher
Direction of Rotation: Top blade aft
Tail Rotor Blade Characteristics
Number of Blades: 4
Blade Construction:
Blade Chord:  
Blade Twist:  
Tail Rotor Derived Characteristics
Disc Area: 29.19 m² 314.2 ft²
Tail Rotor Blade Derived Characteristics
Tip Speed:  
Blade Area (per blade):  

Related VFS Resources

Resources related to the CH-53K (Prototype EDM-1) King Stallion, provided by the Vertical Flight Society.
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Related Public Resources

Resources related to the CH-53K (Prototype EDM-1) King Stallion, provided by public sources across the internet.