Hook cable support assembly

摘要

A hook cable support assembly is arranged to support a hook cable above a runway surface for arrestment of an aircraft having a tail hook. The operating mechanism of the support assembly is mounted to the detachable cover of an enclosure. A cable support block holding the hook cable can be rotated to lower the cable into a runway slot for non-arrested landings and can be depressed downward upon impact by an aircraft wheel. Support block rotation is controlled by a pneumatic cylinder and compression spring combination acting via a four-bar linkage. Support block upward recovery following depression is controlled by torsion springs. The cylinder and compression and torsion springs are mounted to the lower surface of the cover and function as a self-contained mechanism isolated from mechanical contact with the enclosure. With this cover-mounted configuration, the operating mechanism of the cable support assembly is removable for service or replacement by detachment of the cover.