The US Army helicopter shown in the picture is called a Chinook. The Boeing CH-47 Chinook and variants of this style, are among the heaviest lifting Western helicopters. Its name Chinook, is from the Native American Chinook people who currently live in modern-day Washington state.

The most spectacular mission in previous conflicts when this helicopter was used, occurred in the Vietnam conflict (1955-1975). The Chinook was critical for placing of artillery batteries in perilous mountain positions inaccessible by any other means. At its peak employment in Vietnam, 22 Chinook units were in operation. Of the nearly 750 Chinook helicopters in the US and South Vietnam fleets, about 200 were lost in combat or wartime operational accidents.

Since its inception, the Chinook has also carried out secondary missions including medical evacuation, disaster relief, search and rescue, aircraft recovery, fire fighting, and heavy construction assistance. Its role is considered as a transport helicopter.

Some of the characteristics of a Chinook include a three person crew- pilot, copilot and a flight engineer or loadmaster. Payload is 24,000 lb (10,886 kg). Maximum speed is 170 knots (196 mph, 315 km/h) with a cruising speed of 184 mph(296 km/h).

The Chinook has a range of approximately 450 mi (742 km) and can operate up to 20,000 ft (6100 m) called its service ceiling.

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