Aeronautics and astronautics – Aircraft power plants – Mounting
Patent
1975-12-29
1977-08-30
Blix, Trygve M.
Aeronautics and astronautics
Aircraft power plants
Mounting
248 5, 60 3931, B64D 2906
Patent
active
040449734
ABSTRACT:
A nacelle assembly including an inlet channel, an exterior cowl, a fan channel, and a turbine exhaust nozzle is directly mounted on a turbofan jet propulsion engine. The engine in turn is shock mounted directly on a strut, in turn affixed to an aircraft. A central portion of the outer cowl is hinged to open in a clam shell manner about hinges positioned adjacent the strut location to expose the fan casing and engine accessories for maintenance and removal. A rearward portion of the nacelle assembly is formed in two D-duct structures that are also hinged to open in a clam shell manner about hinges positioned adjacent the strut location. The D-duct structures include portions of the outer cowl and of the fan duct walls. When the D-duct structures are open, the turbine casing of the turbofan engine is exposed for maintenance, repair and removal. A pair of beams, affixed at one end to the aircraft fuselage, and enclosed by an aerodynamic fairing, constitute the mounting strut. The beams extend beyond the fairing into the nacelle and through a fan duct bifurcating structure. The forward of the two beams forks into a yoke-like structure that surrounds a portion of and is affixed by shock mounts to the exterior of the fan casing. The rear beam is also affixed to the turbine casing by a shock mount.
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Barefoot Galen
Blix Trygve M.
The Boeing Company
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