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US 5,810,287 AGranted
Aircraft support pylon
AssigneeThe Boeing Company
InventorsBrian J. O'Boyle, Eric E. Adamson, Michael R. Schramm
Life of this patent
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AssigneeThe Boeing Company
InventorsBrian J. O'Boyle, Eric E. Adamson, Michael R. Schramm
Estimating the term…
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.
In a wing-mounted pylon for attaching an assembly to an aircraft wing, the pylon including a cantilevered strut having an upper surface, an improvement comprising an upright fin having an tipper surface and a lower surface, the fin at its lower surface being attached to the strut upper surface, the fin for stiffening the strut, wherein the fin extends a forward distance chordwise over the wing about one quarter to three quarters the wing chord.
A support pylon for attaching a heavy engine to a thin supersonic aircraft wing, the wing having an upper surface over which air flows during flight, the wing having a rear spar, the pylon including:
In a wing-mounted pylon for attaching a heavy engine to a thin supersonic aircraft wing having a rear spar, the pylon including a strut cantilevered from the rear spar, the strut including an upper surface, an improvement comprising an upright fin having a lower surface, the fin at its lower surface being connected to the strut upper surface, the fin for stiffening the strut, the fin extending a distance over the wing a forward direction to at least the wing rear spar, the fin having structural stiffness in the range of about 20 to 100 kips per inch of vertical deflection as measured at the aft end of the fin.
Dependencies are inferred from the claim text.