Boeing CH-47 Chinook Helicopter Pilot's Flight Operating ManualThe Boeing CH 47 is one of the worlds most versatile and efficient helicopters. With its twin engines and twin contra rotating props eliminating the torque problems found on single engine helis, all of the C 47 Chinooks 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. Over 22 nations past