Vertipedia - Boeing ACH-47A Chinook

Gunship version of the CH-47A

Overview

Data on design, manufacture and status

Design authority: The Boeing Company

Primary manufacturer: The Boeing Company

Parent type: Boeing Model 234/H-47 Chinook

Aircraft status: No longer flying

Configuration

Primary flight and mechanical characteristics

VTOL type: Helicopter

Lift devices: 2 in Tandem (Fore/aft) configuration

Crew required: 2 in Side-by-side arrangement

Landing gear: Wheels (some retractable)

Aircraft Details

Data on aircraft configuration, weights, flight performance and equipment

Layout and Dimensions

Weights and Performance

Engine Details

Primary Lift Device

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
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:

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:

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:

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

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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Images

Overview

Attribution

Miscellaneous

Attribution

Number of engines:	2 Turbines
Max Level Flight Speed:	241 km/h	130 kts
Max Range:	1,344 km	726 nm
Max Endurance:

Main Rotor Diameter:	18.01 m	59.10 ft
Max Gross Weight (ground):	14,969 kg	33,000 lb