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A gas turbine propulsion engine for aircraft of the type in which thrust is provided only from flow of exhaust gases or a combination of flow of exhaust gases and by-pass air, the engine having a cone-shaped spinner with a solid pointed tip portion and a main body portion. The tip portion has at lea

A gas turbine propulsion engine for aircraft of the type in which thrust is provided only from flow of exhaust gases or a combination of flow of exhaust gases and by-pass air, the engine having a cone-shaped spinner with a solid pointed tip portion and a main body portion. The tip portion has at least a surface made of a different material from the substantially rigid material of the main body portion, the at least surface of the tip portion being flexible relative to the body portion at operational rotations of the spinner whereby ice is automatically shed from the spinner due to cracks being developed at the bond between the tip portion and the main body portion. The cracks in the ice developed at the bond are propagated by the surface deflection of the remainder of the tip portion causing any accretion of ice thereon to shed from the remainder of the spinner.

대표청구항 ▼

In a gas turbine propulsion engine for aircraft in which thrust is provided only from flow of exhaust gases or a combination of flow of exhaust gases and by-pass air, said engine having an air inlet and an exhaust gas outlet, the improvement in a spinner positioned in the forward end of said air inl

In a gas turbine propulsion engine for aircraft in which thrust is provided only from flow of exhaust gases or a combination of flow of exhaust gases and by-pass air, said engine having an air inlet and an exhaust gas outlet, the improvement in a spinner positioned in the forward end of said air inlet for automatically shedding ice accretions at operational rotations of the engine, said spinner comprising: a conical member having an included conical angle of substantially 57°, said conical member having a frusto-conical main body portion and a solid pointed cone-shaped tip portion attached thereto by a bond, said solid pointed cone-shaped tip portion of said spinner having an axial length relatively shorter than an axial length of said frusto-conical main body portion and said axial length of said solid pointed cone-shaped tip portion being no greater than 75 mm. and no less than 50 mm., said frusto-conical main body portion being manufactured from a material rigid at operational rotations of the spinner, and said solid pointed cone-shaped tip portion having at least a surface made of a different material from and flexible relative to said rigid material of said frusto-conical main body portion, said different material of the at least said surface of said solid pointed cone-shaped tip portion being flexible at said bond during operational rotation of the spinner causing local high stress levels to be produced and cracks propagated in any ice at said bond with surface deflection of the remainder of the at least said surface of said solid pointed cone-shaped tip portion causing any accretion of ice thereon to shed from the remainder of the spinner.