To solve a problem that conventionally a static pressure adjusting chamber is provided on a side surface of a side thruster so as to restrain aerodynamic power influence force acting to offset the thrust, and installation of the static adjustment chamber disturbs high density of a machine body, or causes lowering of turning load performance by lowering of structure strength, or reduction of a range.
An injection port of a thruster is an elliptic shape long along the machine body axial direction, an action area of a low pressure part of a thruster downstream side caused by injection gas of the thruster and aerodynamic power influence of the air flow in side thruster device operation is reduced, the aerodynamic power influence force acting so as to offset the thruster thrust is restrained, and thereby the flying characteristic of high maneuverability can be achieved by a simple structure.
Tadahiko Inaba
Kanako Murakami
Nakatsuru Kazutaka