The Boeing CH-47 is one of the world's most versatile helicopters. With its twin engines and twin contra-rotating props eliminating the torque problem, all of the C-47's 10,000 hp is available to provide lift and thrust.
Used for civilian applications including passenger service, cargo hauling, fire fighting and logging, it has also had a long career in combat and military support in over 22 nations. With a lifting capability of close to 25,000 lbs., it can even lift a damaged Chinook in a pinch!
This CH-47 flight operating manual is used by the U.S. Army for instructional purposes. It tells pilots nearly everything they need to know before entering the cockpit.