The later version of the YHC-1B fitted with T55-L-7 turbines.

Military CH-47As were built around the box-like cabin, which was specified to hold 33 to 44 combat-ready troops. Alternately, 24 casualties on litters (and two medical attendants) could be carried, or bulk cargo of roughly 9,525 kg (21,000 lbs). The lower portion of the cabin was sealed, forming a water-tight compartment that enabled amphibious operation.

Overview

Data on design, manufacture and status

Latest or last design authority: The Boeing Company
Originally designed by The Boeing Company - Vertol Division

Latest or last primary manufacturer: The Boeing Company
Originally manufactured by The Boeing Company - Vertol Division

Parent type: Boeing Model 234/H-47 Chinook

Aircraft status: No longer flying

Configuration

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 (some retractable)

Layout and Dimensions

Data on aircraft size

The landing gear track provided is for the rear wheel pair. Landing gear track for the front wheels is 3.2m (10 ft 6 in).

Overall Dimensions
Overall Height: 5.68 m 18.7 ft
Overall Length: 29.90 m 98.1 ft
Overall Width: 18.01 m 59.1 ft
Airframe Dimensions
Airframe Length: 15.47 m 50.8 ft
Airframe Width: 3.78 m 12.4 ft
Airframe Height: 5.65 m 18.6 ft
Landing Gear Dimensions
Landing Gear Base: 6.86 m 22.5 ft
Landing Gear Track: 3.40 m 11.2 ft
Cabin Dimensions
Cabin Internal Height: 1.98 m 6.5 ft
Cabin Internal Length: 9.30 m 30.5 ft
Cabin Internal Width: 2.29 m 7.5 ft

Weights and Performance

Data on aircraft weight and flight characteristics

Weights
Max Gross Weight (ground): 14,969 kg 33,000 lb
Max Gross Weight (airborne):  
Max Take-off Weight: 14,969 kg 33,000 lb
Empty Weight: 8,295 kg 18,288 lb
Useful Load: 6,673 kg 14,712 lb
Empty Weight Fraction: 0.554
Climb Performance
Max Rate of Climb: 10 m/s 2,040 fpm
Hover Performance
Hover Ceiling IGE:  
Hover Ceiling OGE: 2,682 m 8,800 ft
Limitations
Max Level Flight Speed: 241 km/h 130 kts
Never Exceed Speed:  
Service Ceiling: 3,627 m 11,900 ft
Range and Endurance
Max Range: 1,344 km 726 nm
Max Endurance:  

Engine Details

Aircraft powerplant (lift and/or propulsion)

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

Powerplant
Number of engines: 2
Designation: Lycoming T55-L-7 turbine
Manufacturer: Lycoming Engines
Normal Ratings
Max continuous:  
Take-off / rated: 1977 kW 2650 hp
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

With the forward rotor rotating counter-clockwise and the aft rotor rotating clockwise, CH-47A models had a rotor diameter of just over 18m (59' 1.25"). Later Chinooks fielded composite blades with 60' diameters.

Main Rotor Characteristics
Diameter: 18.01 m 59.10 ft
RPM: 230.0 rpm 230.0 rpm
Direction of Rotation: Counter-rotating
Hub Type:
Main Rotor Blade Characteristics
Blade Construction: Stainless steel
Blade Chord: 0.584 m 1.92 ft
Blade Tip Geometry: Square-edged tips
Blade Twist: -0.209 rad -12.000 deg
Number of Blades: 3
Main Rotor Derived Characteristics
Disc Area: 254.89 m² 2743.7 ft²
Disc Loading: 29.36 kg/m² 6.014 lb/ft²
Solidity: 0.0619
Main Rotor Blade Derived Characteristics
Blade area per blade: 5.26 m² 56.6 ft²
Tip Speed: 216.95 m/s 711.8 fps

Primary Control Device

Data on primary control devices such as tail rotors

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

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