Aeronautics and astronautics – Aircraft structure – Details
Patent
1996-01-02
1999-06-29
Barefoot, Galen L.
Aeronautics and astronautics
Aircraft structure
Details
B64C 902
Patent
active
059156538
ABSTRACT:
The invention is an aircraft two part hinge line fairing design for preventing physical interference between the two fairing parts while eliminating unacceptable gaps between the the two fairing parts. The problems are made worse by the fact that the hinge line is not perpendicular to the longitudinal centerline of the fairing which is aligned with the airflow. The problems, such as gaps, are unsightly and also increase drag. These problems are solved by the use of two matching surfaces of the fairing having substantially the same curvature and radius in all directions. The slight difference in curvature, and radius, is appropriate to allow a smaller fairing part to extend into a larger fairing part for freedom of movement with respect to each other. Accordingly, the first of the two surfaces should have radii r1 equal to the distance from the hinge point D to the fairing surface, and the second of the two surfaces should preferably have radii r2 equal to the distance from the hinge point D to the second of the fairing surfaces plus approximately 0.15 inches or so to allow for clearance with the first fairing surface.
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Barefoot Galen L.
Donahue Bernard A.
The Boeing Company
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