Abstract:
Electrically controlled and/or actuated landing gear mechanisms are presented that allow for adjustment of aircraft attitude on the ground as well as for retraction and extension of the landing gear in a single unit. Most preferably, the electric actuator is positioned within the diameter of the strut to thereby form a compact and load bearing structure.
Abstract:
An aircraft wheel support mechanism capable of reducing the shock to the tire at the time of landing and capable of reducing the shock to the tire at the time of the wheel colliding with an obstacle lying on the runway. The mechanism comprises a suspension mechanism 3 for rotatably supporting a wheel 13 by the lower end of a support member 2 connected to the fuselage, the suspension mechanism 3 having a crank shaft assembly 5, and is characterized in that the crank shaft assembly comprises a horizontal support shaft 51 rotatably supported by the lower end of the support member, an axle 52 for rotatably supporting the wheel, and an arm 53 positioned at right angles with the horizontal support shaft and axle for connecting one end of the horizontal support shaft to one end of the axle.
Abstract:
A semi -levered landing gear (10) is provided that includes a shock strut (12), a truck beam (18) pivotally connected to the shock strut and a semi -levered landing gear mechanism including at least three links (24, 30a, 30b) configured to angularly orient the truck beam and a truck pitch actuation system (40) operatively connected to at least one of the three links. The landing gear mechanism may be configured to cooperate with an extension of a shock strut by positioning the truck pitch actuator in a retracted position, thereby positioning a forward end of the truck beam in a raised position relative to the aft end of the truck beam. The landing gear mechanism may also be configured to cooperate with a retraction of the shock strut into the wheel well by extending the truck pitch actuator to position a forward end (18a) of the truck beam in a lower position relative to the aft end (18b) of the truck beam.
Abstract:
The invention is a process for landing a tailless or flying wing type aircraft having a nose and wings that produce lift. The process includes the step of allowing the nose of the aircraft to stay lower upon touchdown such that lift from the wings is reduced.
Abstract:
L'invention concerne un train d'atterrissage relevable d'aéronef, du type à relevage vertical, comportant une pluralité de jambes indépendantes (101), chaque jambe comportant une pièce de structure (102) rigidement solidaire d'une structure d'aéronef, un balancier pivotant (103) et un amortisseur (109). Conformément à l'invention, chaque jambe (101) comporte en outre un vérin de positionnement (110) relié de façon articulée à l'amortisseur (109), l'ensemble étant interposé entre un appendice (105) du balancier (103) et un élément mobile (113) faisant partie de la tringlerie de manoeuvre du train. Une bielle de liaison (107) est interposée entre le balancier (103) et le point d'articulation (108) entre le vérin de positionnement (110) et l'amortisseur (109). Le vérin de positionnement (110) est agencé pour se raccourcir et/ou se rallonger en vue d'un affaissement ou d'un rehaussement de la jambe concernée, lorsque l'aéronef est à l'arrêt ou en déplacement lent au sol.
Abstract:
An aircraft landing gear (10) comprising: a strut (12) having an upper portion (12a) arranged to be mechanically coupled to an aircraft and a lower portion (12b) movably mounted with respect to the upper portion; a bogie beam (14) pivotally coupled to the lower portion of the strut; a bogie control linkage (20, 22, 24) mechanically coupled to the bogie at a first connection point and to the strut at a second connection point, the bogie control linkage comprising an actuator (24), the actuator including a locking system (24a) operable to inhibit actuation of the actuator; a sensor linkage (26) mechanically coupled to the lower portion of the strut and arranged to change between a first condition and a second condition in accordance with movement of the upper portion of the strut relative to the lower portion of the strut; and an actuator control linkage (28, 30, 32) arranged to operate the locking system when the sensor linkage is in the first condition and arranged not to operate the locking system when the sensor linkage is in the second condition.
Abstract:
A mechanism for increasing the ride height of aircraft by selectively increasing the hydraulic fluid content within landing gear struts. By increasing the hydraulic fluid volume within a strut, the strut is lengthened without adversely affecting its spring rate while the ability to withdraw fluid from a strut maintains the ability of the strut to absorb the impact of landing. The mechanism is readily retrofitable to existing landing gear systems to accommodate more efficient under the wing intake designs and to reduce the likelihood of FOD during taxiing at minimal cost and with very a minimal increase in the aircraft weight.
Abstract:
Electrically controlled and/or actuated landing gear mechanisms are presented that allow for adjustment of aircraft attitude on the ground as well as for retraction and extension of the landing gear in a single unit. Most preferably, the electric actuator is positioned within the diameter of the strut to thereby form a compact and load bearing structure.
Abstract:
The invention is a process for landing a tailless or flying wing type aircraft having a nose and wings that produce lift. The process includes the step of allowing the nose of the aircraft to stay lower upon touchdown such that lift from the wings is reduced.
Abstract:
L’invention concerne un amortisseur de jambe de train d’atterrissage d’aéronef du type comportant un caisson principal (11) et une tige-piston (13) délimitant avec le caisson (11) une chambre principale (14) et une chambre annulaire (15) de fluide hydraulique, et présentant intérieurement deux chambres adjacentes (19, 20) isolées l’une de l’autre par un piston séparateur (21). Conformément à l’invention, l’amortisseur (10) comporte en outre un premier caisson secondaire (26) coulissant télescopiquement sur la tige-piston précipitée (13), ainsi qu’un deuxième caisson secondaire (37) coulissant télescopiquement sur l’autre extrémité du premier caisson secondaire (26). Les deux chambres secondaires annulaires (31, 40) ainsi délimitées sont reliées chacune à un circuit de commande associé permettant ainsi de raccourcir ou de rallonger la longueur totale de l’amortisseur en vue respectivement d’un affaissement ou d’un rehaussement de la jambe de train.