The McDonnell-Douglas (Boeing) AH-64 helicopter was selected as the winner in the competition with Bell's YAH-63 in December 1976. The name Apache stuck to the helicopter in 1981. This highly effic ... ient machine has four-blade rotors driven by two General Electric T700-701 turbine engines with a capacity of 1696HP. The vestigial wings are fitted with conventional trailing edge flaps, and a plate tail improves longitudinal steering. The two-man crew takes seats one after the other in the armored cabin. The pilot's seat is in the rear, and the weapon operator / gunner is in the front.