Japan Aircraft Development Corporation

Mitsubishi Jukogyo Kabushiki Kaisha

Fuji Jukogyo Kabushiki

Kanichi Amano

Katsuhiko Shibata

Yasuhiro Tani

Kiyoshi Okura

Kazuo Izumiyama

Katsuya Matsuzaki

A nacelle apparatus for an airplane of the type having nacelles for jet engines suspended under a wing via pylons includes lip-shaped small wings corresponding to the nacelles for the jet engines. Each lip-shaped small wing extends from the upper trailing edge of each nacelle to the opposite sides of a pylon. The nacelle apparatus assures that lift/drag properties of the nacelle apparatus can be improved by reducing a magnitude of drag induced by aerodynamic interference of the main wing with the nacelle.

Nacelle apparatus for an airplane

The present invention is drawn to an improvement in the configuration of an inner lining plate of an aircraft fuselage wall, which will result in the sound transmission loss (TL) of the inner lining plate to occur in a frequency range covering the frequencies of external noises such as propeller sound, such that external noises transmitted from the inside of the aircraft fuselage can be reduced. The improvement resides in that a tensile rigidity in the circumferential direction of a substantially cylindrical fuselage wall inner lining plate is less than the tensile rigidity in the axial direction thereof. In this respect, the inner lining plate is provided with a large number of parallel crests extending in the axial direction. Alternatively, the substantially cylindrical fuselage wall inner lining plate can be made of fiber-reinforced plastics, in which fibers are woven in the axial direction in a mode different from that in which they are woven in the circumferential direction to provide an anisotropic property in which tensile rigidity in the circumferential direction is less than in the axial direction.

Fuselage wall inner lining plate

Growing community of inventors

Tokyo, Japan

Kanichi Amano