Derived from the Model 107 and also known as the UH-46A under the US Navy.  Developed in 1960, the Model 107-2 is a commercial passenger-transport helicopter with a capacity of 25; weight fully loaded is 21400 lb (9707 kg).  Two of the organizations to first order the aircraft are New York Airways (replacing the Vertol 44) and the Royal Swedish Navy [Ref. 312, 316]


Data on design, manufacture and status

Design authority: Vertol Aircraft Corporation

Primary manufacturer: Vertol Aircraft Corporation

Parent type: Vertol Model 107/CH-46

Aircraft status: No longer flying


Primary flight and mechanical characteristics

VTOL type: Helicopter

Lift configuration: Tandem (Fore/aft) (x2)

Crew required: 2

Crew seating: Side-by-side

Landing gear: Wheels (non-retractable)

Layout and Dimensions

Data on aircraft size

Update Required: Overall Length [Ref. 309]

Overall Dimensions
Overall Height: 5.13 m 16.8 ft
Overall Length: 25.40 m 83.3 ft
Overall Width: 14.73 m 48.3 ft
Airframe Dimensions
Airframe Length: 13.67 m 44.8 ft
Airframe Width: 4.42 m 14.5 ft
Airframe Height: 5.13 m 16.8 ft
Landing Gear Dimensions
Landing Gear Base: 7.49 m 24.6 ft
Landing Gear Track: 3.89 m 12.8 ft
Cabin Dimensions
Cabin Internal Height: 1.83 m 6.0 ft
Cabin Internal Length: 7.37 m 24.2 ft
Cabin Internal Width: 1.83 m 6.0 ft

Weights and Performance

Data on aircraft weight and flight characteristics

Cruise Speed: 148 mph (238.183 km/h)

Max Gross Weight (ground): 7,734 kg 17,050 lb
Max Gross Weight (airborne):  
Max Take-off Weight: 7,734 kg 17,050 lb
Empty Weight: 4,024 kg 8,872 lb
Useful Load: 3,709 kg 8,178 lb
Empty Weight Fraction: 0.520
Climb Performance
Max Rate of Climb: 7 m/s 1,401 fpm
Hover Performance
Hover Ceiling IGE:  
Hover Ceiling OGE:  
Max Level Flight Speed: 254 km/h 137 kts
Never Exceed Speed: 270 km/h 146 kts
Service Ceiling: 4,508 m 14,790 ft
Range and Endurance
Max Range: 431 km 233 nm
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: GE T58-GE-8 turbine
Manufacturer: GE Aviation
Normal Ratings
Max continuous:  
Take-off / rated: 932 kW 1249 hp
OEI Ratings
OEI contingency:  
OEI continuous:  
OEI 30-second:  
OEI intermediate:  

Primary Lift Device

Data on primary lift devices such as main rotors

Longitudinal Tandem main rotors

Main Rotor Characteristics
Diameter: 14.73 m 48.33 ft
Direction of Rotation: Counter-rotating
Hub Type: Fully articulated
Main Rotor Blade Characteristics
Blade Construction:
Blade Chord:  
Blade Tip Geometry:
Blade Twist:  
Number of Blades: 3
Main Rotor Derived Characteristics
Disc Area: 170.46 m² 1834.8 ft²
Disc Loading: 22.69 kg/m² 4.646 lb/ft²
Main Rotor Blade Derived Characteristics
Blade area per blade:  
Tip Speed:  

Primary Control Device

Data on primary control devices such as tail rotors

Tail Rotor Characteristics
Configuration: Unknown
Direction of Rotation: Unknown
Tail Rotor Blade Characteristics
Number of Blades:  
Blade Construction: N/A
Blade Chord:  
Blade Twist:  
Tail Rotor Derived Characteristics
Disc Area:  
Tail Rotor Blade Derived Characteristics
Tip Speed:  
Blade Area (per blade):  

Related VFS Resources

Resources related to the CH-46A (HRB-1) Sea Knight, provided by the Vertical Flight Society.
Forum Proceedings
Vertiflite articles
Enter a search term in the box above.
Web files from
Enter a search term in the box above.
Webpages from
Enter a search term in the box above.

Related Public Resources

Resources related to the CH-46A (HRB-1) Sea Knight, provided by public sources across the internet.