Abstract:
In one embodiment, a tiltrotor aircraft (100, 200, 300, 400, 500) may comprise a fuselage (102, 202, 302, 402, 502); a biplane wing (120, 220, 320, 420, 520, 530) coupled to the fuselage (102, 202, 302, 402, 502), wherein the biplane wing (120, 220, 320, 420, 520, 530) comprises an upper wing structure (121a-b, 221a-b, 231a-b, 241a-b, 251a-b, 321, 331, 341, 421a-b) and a lower wing structure (122a-b, 222a-b, 232a-b, 242a-b, 252a-b, 322, 332, 342, 422a-b); a plurality of tiltrotors (110a-b, 210a-b, 410a-b) coupled to the biplane wing (120, 220, 320, 420, 520, 530); and at least one engine to power the plurality of tiltrotors (110a-b, 210a-b, 410a-b).
Abstract:
In one embodiment, a rotorcraft (100) comprises a fuselage (110), a tail boom (202), a rotor system (120), and a centrifugal blower system (200). The centrifugal blower system (200) comprises a centrifugal blower (204) configured to generate thrust using an airflow, wherein the centrifugal blower (204) is located within the tail boom (202). The centrifugal blower system (200) also comprises a plurality of ducts configured to control the thrust generated by the centrifugal blower (204), wherein the plurality of ducts is located on a portion of the tail boom (202) surrounding the centrifugal blower (204), and wherein the plurality of ducts comprises one or more adjustable ducts configured to vary a size of an associated duct opening.
Abstract:
A variable thrust cross-flow fan system (30) for an aircraft (10) including a rotatable wing member (60) having a first housing member (60a); an actuator assembly (71) operably coupled to the first housing member (60a); and a variable thrust cross-flow fan assembly (70) including a first and second driver plates (204, 206) having a plurality of blades (210a-g) rotatably mounted therebetween. The plurality of blades (210a-g) has a circular path of travel when rotating and includes a control assembly coupled to the plurality of blades (210a-g) to generate a variable thrust force. The control assembly includes a control cam (230) that is substantially non-rotatable relative to the first and second driver plates (204, 206) and a hinge member (831) that is fixedly connected to the control cam (230) and to the first housing member (60a) at a hinge axis. Rotation of the first housing member (60a) by the actuator assembly (71) imparts rotation of the control cam (230) about the hinge axis, thereby changing the direction of the variable thrust force.
Abstract:
A variable thrust cross-flow fan system (30) for an aircraft (10) including a rotatable wing member (60) having a first housing member (60a); an actuator assembly (71) operably coupled to the first housing member (60a); and a variable thrust cross-flow fan assembly (70) including a first and second driver plates (204, 206) having a plurality of blades (210a-g) rotatably mounted therebetween. The plurality of blades (210a-g) has a circular path of travel when rotating and includes a control assembly coupled to the plurality of blades (210a-g) to generate a variable thrust force. The control assembly includes a control cam (230) that is substantially non-rotatable relative to the first and second driver plates (204, 206) and a hinge member (831) that is fixedly connected to the control cam (230) and to the first housing member (60a) at a hinge axis. Rotation of the first housing member (60a) by the actuator assembly (71) imparts rotation of the control cam (230) about the hinge axis, thereby changing the direction of the variable thrust force.
Abstract:
In one aspect, there is provided an aircraft (10), including a fuselage (12) having a longitudinal axis extending from a front portion through an aft portion (14); first and second tail members (36, 38) extending from the aft portion (14); a first cross-flow fan system (32) rotatably mounted to the first tail member; and a second cross-flow fan system (34) rotatably mounted to the second tail member. The first and second cross-flow fan systems are configured to provide a forward thrust vector and an anti-torque vector on the aircraft. The first and second cross-flow fan systems can have a rotational axis (R1, R2) oriented generally vertically. In another aspect, there is an aircraft including a fuselage having a front portion and a tail portion; and a cross-flow fan system supported by the tail portion. Embodiments include a cross-flow fan system retrofittable onto an aircraft and methods for retrofitting an aircraft with a cross-flow fan system.