Aeronautics and astronautics – Aircraft control – Pilot operated
Patent
1994-03-28
1996-09-03
Barefoot, Galen L.
Aeronautics and astronautics
Aircraft control
Pilot operated
244232, B64C 1330
Patent
active
055516521
ABSTRACT:
In an aircraft control system a standby cable system which does not significantly affect existing control system friction, but detects when the primary cables are severed and actuates an alternative elevator control mechanism. The standby cable loop of the instant invention consists of two similar type mechanisms located outside the uncontained rotor or propeller shrapnel area. One mechanism attaches to the primary cables and is located forward of the engine and the other is located aft. Each mechanism operates such that negligible friction is added because during normal control motions the standby cable loop does not move, only individual elements input cranks are in motion. The primary cables are provided with an index cable that is routed close to and parallel to the primary cables. In the event the engine shrapnel cuts the primary cables, the index cable will also be cut because of its close proximity to the primary cables and due to the fact it is of smaller size. When the index cable has severed, a spring loaded crank through linkage causes an alternate push-pull cable to be engaged.
REFERENCES:
patent: 3599507 (1971-08-01), Exton
patent: 4170147 (1979-10-01), Durno et al.
patent: 4186622 (1980-02-01), Cooper
patent: 4198877 (1980-04-01), Huling
patent: 4287788 (1981-09-01), Baetke
patent: 4540141 (1985-09-01), Durno et al.
Barefoot Galen L.
Kohlmann Henry G.
McDonnell Douglas Corporation
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