B - Operations – Transporting – 64 – C
Patent
B - Operations, Transporting
64
C
244/79
B64C 25/12 (2006.01)
Patent
CA 1097299
ABSTRACT OF THE DISCLOSURE A wing mounted retractable aircraft undercarriage with a trailing wheel or wheels comprising a rigid leg casing, pivotally mounted on the wing about a retraction axis, a rocking lever pivoted on the leg casing, supporting the wheel or wheels and mounting the lower pivot connection of a shock absorber located behind the leg casing, an upper pivot connection of the shock absorber to a lever, which lever is pivotable on the leg casing about an articulation axis which is distinct from the retraction axis, a rod of fixed length pivoted at one end to the lever and at the other end to a fixed position on the wing, so that upon retraction of the undercarriage by the action of a retraction jack, the rod causes rotation of the lever with respect to the leg casing, which rotation, by traction of the ex- panded shock absorber causes pivoting, with respect to the leg casing, of the rocking lever mounting the wheel or wheels towards the retraction axis, and thus an overall shortening of the undercarriage. Preferably the axis of the pivot connection of the shock absorber to the lever and said articulation axis are aligned with the longitudinal axis of the shock absorber in the undercarriage down position. The rod and said articula- tion axis are preferably disposed in relation to the retraction axis in such a way that during retraction the extent of rotation of the lever with respect to the leg casing is greater than the extent of the rotation of the leg casing with respect to the wing.
304791
Marks & Clerk
Societe Anonyme Dite: Messier-Hispano-Bugatti
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