Aeronautics and astronautics – Aircraft power plants – Mounting
Patent
1996-05-24
1998-09-22
Grant, William
Aeronautics and astronautics
Aircraft power plants
Mounting
2441181, 2441374, 60 3931, 248554, B64C 332
Patent
active
058102876
ABSTRACT:
An improvement of a vertical fin (18) attached to a pylon strut (14) that is cantilevered from a wing rear spar (16) of a supersonic aircraft (9), the improved pylon (10) for mounting heavy assemblies such as an engine (8) to an aircraft wing (12). The fin (18) is a thin, elongate member having a ratio of fin height (36) to fin width (38) of about between 3:1 to 5:1. The ratio of fin length(34) to fin width (38) is preferably equal to or greater than 30:1. The fin at its lower surface (24) is attached to an upper surface (20) of the strut (14). The fin (18) preferably extends forward over a portion of the upper surface (22) of the wing (12) and is additionally attached thereto. One embodiment of a fin construction includes a U-shaped lower channel (40), an inverted U-shaped upper channel (42), a pair of substantially parallel upright sidewalls (32), an arcuate upper closeout member (46), and aerodynamic seals 48 as required. The area defined by the upright sidewalls (32) and the lower and upper channels (40), (42) is filled by a partitioned middle material (44), such as honeycomb core.
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Adamson Eric E.
O'Boyle Brian J.
Schramm Michael R.
Grant William
The Boeing Company
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