Aeronautics and astronautics – Aircraft sustentation – Sustaining airfoils
Patent
1982-05-12
1983-11-29
Blix, Trygve M.
Aeronautics and astronautics
Aircraft sustentation
Sustaining airfoils
244117R, 244119, 244120, 244131, 244124, B64C 338
Patent
active
044177089
ABSTRACT:
A design system for aircraft that allows wings of various different planforms to be mounted interchangeably on a common fuselage. Each of the wings has wing semi-spans joined by a center section torque box that mounts the wing in a cut-out in the aircraft fuselage. The torque box has a quadrilateral structure including front and rear main center section spars. These center section spars have their ends connected to the front and rear main spars of the semi-spans to transmit wing loads into the fuselage. The length of the main center section spars are designed in accordance with the invention such that they can connect with the main spars of the wing semi-spans to position the quarter chord of the wing properly with respect to the center of gravity of the aircraft irrespective of the wing planform. Thus, aft-swept, forward-swept, or straight wings can be routinely interchanged on a common fuselage without effecting the positive static longitudinal stability of the aircraft. Interchangeable wings can be used with a common fuselage to produce either a high or a low wing configuration.
REFERENCES:
patent: 2211089 (1940-08-01), Serlin
patent: 2838260 (1958-06-01), Christensen
patent: 4116405 (1978-09-01), Bacchi et al.
patent: 4148450 (1979-04-01), Neuhierl
Blix Trygve M.
Geib Richard G.
Grumman Aerospace Corporation
Shum Ivy M.
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