AIRCRAFT

• US 3,756,541 A
• Filed: 01/25/1971
• Issued: 09/04/1973
• Est. Priority Date: 01/25/1971
• Status: Expired due to Term

• Current Assignee: Paolo Orazi
• Original Assignee: Paolo Orazi
• Inventors: Orazi, Paolo
• Primary Examiner(s): Buchler, Milton
• Assistant Examiner(s): Rutledge, Carl A.
• Application Number:
  US05/109,104
• Time in Patent Office: 953 Days
• Field of Search: 244/39,35,123,124 416/87,88,131,226,238
• US Class Current: 244/39
• CPC Class Codes: B64C 39/005 about a horizontal transversal axis

Abstract

The fuselage carries a rotatable tubular spar. Ribs fixed transversely of the spar support wing sheets. Slots in the wing sheets enable the ribs to pass through the wing sheets. Stops on the ends of the ribs limit the radial movement of the wing sheets. The slots and stops permit the tubular spar to flex during rotation.

Claims

1. A rotary wing assembly for an aircraft, said assembly comprising a spar intended to be rotatably mounted upon an aircraft fuselage, and wing sheets forming flying surfaces and mounted upon a frame including said spar, the said spar having link means whereby said wing sheets can undergo limited movement relatively to said spar in the plane of the wing, whereby during rotation of the wing the said spar can flex in the plane of the wing without transmission of corresponding bending movement to the wing sheets.

2. An assembly as claimed in claim 1, wherein the spar is linked to the wing sheets by means of transverse ribs in a common plane attached symmetrically to the spar and extending to both sides thereof which ribs are associated with said wing sheets and permit radially outward movement of said wing sheets.

3. An assembly as claimed in claim 1, wherein said ribs have stops at the ends thereof to limit the radially outward movement of the wing sheets.

4. An assembly as claimed in claim 3 wherein the sheets are provided with slots for linkage of the frame thereto.

5. An assembly as claimed in claim 3, wherein the ribs pass through the slots provided in the wing sheets