摘要:
A method of positioning landing gear of an airplane is provided that includes providing the landing gear including a shock strut, a truck beam operatively pivotally connected to the shock strut, first and second interconnected links operatively connected to the truck beam and a third link extending between the shock strut and the first and second links with the third link pivotally connected to the second link at a third pivot. When the landing gear is commanded to a lowered position, the third pivot is positioned in a first position to support a taxi mode, a take-off mode and a landing mode if the landing gear is operational and in a second position to support an alternate landing mode if the landing gear is not fully operational. When the landing gear is commanded to a raised position, the third pivot is in the second position to support a stow mode.
摘要:
Landing gear mount techniques for aircraft are described. The landing gear is mounted to composite structures of the aircraft in a manner that distributes landing loads, including out-of-plane loads, adequately so that the landing gear and its mounting to the aircraft is tough and can withstand variable landing loads. The landing gear is disposed between and fastened on each side to composite bulkheads. The composite bulkheads are also bonded to the outer skins of the aircraft. The described mounting distributes the loads into the composite bulkheads and from there into the outer skins. This distribution of the loading helps the landing gear withstand variable landing loads and helps maintain the integrity of the composite materials.
摘要:
A steerable auxiliary nose undercarriage (2) for a rotary wing aircraft (1); the undercarriage (2) being retractable substantially rearwards. In the undercarriage (2), an oscillating system (13) presents a elevation stroke (58) about its hinged front end (52) that is greater than a shock absorbing stroke (59), and a shock-absorbing actuator (9) possesses retraction means for going beyond a high abutment position of the oscillating system (13) so that the oscillating system (13) and the shock-absorbing actuator (9) provide both a shock-absorption function and an undercarriage retraction function.
摘要:
A rotary wing aircraft (1) such as a helicopter comprises a force-transmission structure (5) for transmitting forces, in particular those coming from an undercarriage (2), and that, in longitudinal elevation view, presents an L-shape in which the arrangement (6, 19-21) forms a transversely centered box (6), such that the structure (5) transfers the forces, at least in part, to top and bottom working covering segments of the fuselage.
摘要:
A steerable auxiliary nose undercarriage (2) for a rotary wing aircraft (1); the undercarriage (2) being retractable substantially rearwards. In the undercarriage (2), an oscillating system (13) presents a elevation stroke (58) about its hinged front end (52) that is greater than a shock absorbing stroke (59), and a shock-absorbing actuator (9) possesses retraction elements for going beyond a high abutment position of the oscillating system (13) so that the oscillating system (13) and the shock-absorbing actuator (9) provide both a shock-absorption function and an undercarriage retraction function.
摘要:
A landing gear hinge shaft is installed on an aircraft structure using at least two ball joints (22), at least one of which is adjustable. The differences between the theoretical and real positions of the centers of the balls are measured, and the adjustments that have to be made to bring the centers of the balls back to their theoretical positions is deduced. This is done by making a first adjustment in the axial direction using a shim (30) and a second adjustment in the radial direction by adjusting the rotation of an inner cage (34) and an outer cage (36) of the ball joint. The inner and outer cages have eccentric axes that facilitate the adjustment.
摘要:
Engine nacelles for use with aircraft. In one embodiment, an engine nacelle includes an inlet having an inlet aperture and an outlet having an outlet aperture. In one aspect of this embodiment, the engine nacelle further includes a first side portion, a second side portion, and a third side portion. The first side portion can extend at least generally between a first edge portion of the inlet aperture and a third edge portion of the outlet aperture. The second side portion can be offset from the first side portion and extend at least generally between a second edge portion of the inlet aperture and a fourth edge portion of the outlet aperture to define a first interior portion. The third side portion can be offset from the second side portion and extend at least generally from the second edge portion of the inlet aperture toward the fourth edge portion of the outlet aperture to define a second interior portion. In another aspect of this embodiment, the first interior portion is configured to house an engine, and the second interior portion is configured to house a landing gear assembly.
摘要:
Engine nacelles for use with aircraft. In one embodiment, an engine nacelle includes an inlet having an inlet aperture and an outlet having an outlet aperture. In one aspect of this embodiment, the engine nacelle further includes a first side portion, a second side portion, and a third side portion. The first side portion can extend at least generally between a first edge portion of the inlet aperture and a third edge portion of the outlet aperture. The second side portion can be offset from the first side portion and extend at least generally between a second edge portion of the inlet aperture and a fourth edge portion of the outlet aperture to define a first interior portion. The third side portion can be offset from the second side portion and extend at least generally from the second edge portion of the inlet aperture toward the fourth edge portion of the outlet aperture to define a second interior portion. In another aspect of this embodiment, the first interior portion is configured to house an engine, and the second interior portion is configured to house a landing gear assembly.
摘要:
A tail sitter aircraft of a type that takes off and lands on its tail section with the fuselage pointed vertically upward has landing gears located on its rearward end. Each of the landing gears is mounted on a support axis which is offset from the fuselage axis and which intersects a wheel axle at a 90 degree angle. The landing gears are located on the tail section and spaced around the fuselage axis. Two of the landing gears which are opposite each other will be locked so that they can roll only along a single straight line. The other two landing gears, which are also spaced opposite each other, are locked so that they can roll only on a single straight line. The straight lines are perpendicular to each other.