초록 ▼

A movable sheet overlying a wing is disclosed that creates laminar flow over its exposed surface. The movable sheet serves as an integral, retractable shield for protecting a suction support structure of a wing against contamination, and also serves as a movable, conductive substrate for deicing by

A movable sheet overlying a wing is disclosed that creates laminar flow over its exposed surface. The movable sheet serves as an integral, retractable shield for protecting a suction support structure of a wing against contamination, and also serves as a movable, conductive substrate for deicing by means of electrical resistance or hot-gas heating. The invention includes a movable sheet that is mounted scroll-like on two motor-driven rollers. The sheet has a solid area without perforations that protects the suction support structure from contamination, and a porous area with perforations therethrough that allows boundary layer suction. The motor-driven rollers scroll the sheet to cover the suction support structure with either the solid area or the perforations of the sheet. Contact rollers at the edge of the sheet supply electrical current to resistively heat the sheet and melt any accumulated ice. The movable sheet can also be moved back and forth to dislodge the ice.

대표청구항 ▼

A movable sheet apparatus for covering a portion of a wing, wherein the apparatus comprises: roller means including a roller rotatably mounted within the wing and extending spanwise with respect to the wing; a movable sheet overlying the wing and extending scroll-like between and engaging the roller

A movable sheet apparatus for covering a portion of a wing, wherein the apparatus comprises: roller means including a roller rotatably mounted within the wing and extending spanwise with respect to the wing; a movable sheet overlying the wing and extending scroll-like between and engaging the roller means, wherein the movable sheet is wrapped fully around the circumference of the roller; and means for rotating the roller means, including means for rotating the roller through multiple revolutions to move the movable sheet.