# US 10,370,085 B2 · Body tab yaw deflector > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,370,085 B2 - Document ID: US10370085B2 - Status: Granted - Kind: B2 - Application number: 15/479,654 - Filed: 2017-04-05 - Published: 2017-11-30 - Granted: 2019-08-06 - Earliest claimed: 2016-05-27 - Assignees: Lockheed Martin Corporation - Applicants: Lockheed Martin Corporation - Inventors: Kenneth Merle Dorsett - Web page: https://patentgrep.com/patent/US10370085B2 ## CPC - B64C 9/02: Mounting or supporting thereof - B64C 3/10: Shape of wings - B64C 5/06: Fins (B64C5/08 takes precedence) - B64C 5/08: mounted on, or supported by, wings - B64C 5/10: adjustable - B64C 9/12: surfaces of different type or function being simultaneously adjusted - B64C 9/323: {associated with wings} - B64C 9/326: {associated with fuselages} - B64C 9/34: collapsing or retracting against or within other surfaces or other members - Y02T 50/10: Drag reduction - Y02T 50/30: Wing lift efficiency - Y02T 50/40: Weight reduction - B64C: AEROPLANES; HELICOPTERS - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract In one embodiment, an apparatus includes a first deflector configured to couple to a shaft of an aircraft. The first deflector may form part of a top surface of the aircraft when in a first closed position. The apparatus may further include a second deflector configured to couple to the shaft and form part of a bottom surface of the aircraft when in a second closed position. The first deflector and the second deflector may be configured to be positioned at a junction of a body of the aircraft and a wing of the aircraft. The first deflector and the second deflector may be configured to simultaneously pivot from the closed positions to respective first and second open positions upon actuation of the shaft. ## Claims ### Claim 1 A tailless aircraft, comprising: a body; a swept back wing positioned adjacent to the body, the wing comprising: a bottom surface; a root proximate to the body; and a tip opposed to the root; a shaft positioned in the tailless aircraft at a swept back angle; and a yaw control device coupled to the shaft and positioned proximate to a junction where the body and the wing meet, the yaw control device comprising: a first deflector forming a portion of a top surface of the tailless aircraft when configured in a closed position, all of the first deflector positioned on the body proximate to the junction when in a closed position; and a second deflector forming a portion of the bottom surface of the tailless aircraft when configured in a closed position, all of the second deflector positioned on the body proximate to the junction when in a closed position; and a hinge connected to the first deflector, the second deflector, and the shaft, the hinge coupling the first deflector to the shaft and the second deflector to the shaft; wherein the first deflector and the second deflector are configured to simultaneously pivot from the closed position to an open position upon actuation of the shaft such that the hinge causes the first deflector to pivot about an axis of rotation through a center of the shaft upwards from the top surface and the hinge causes the second deflector to pivot about an axis of rotation through a center of the shaft and downwards from the bottom surface. ### Claim 2 An aircraft, comprising: a body; a wing positioned adjacent to the body, the wing comprising: a bottom surface; a root proximate to the body; and a tip opposed to the root; and a yaw control device positioned proximate to a junction where the body and the wing meet, the yaw control device comprising: a first deflector configured to couple to the shaft, forming a portion of a top surface of the aircraft when configured in a closed position, all of the first deflector positioned on the body proximate to the junction when in a closed position; a second deflector configured to couple to a shaft, forming a portion of the bottom surface of the aircraft when configured in a closed position, all of the second deflector positioned on the body proximate to the junction when in a closed position; and a hinge connected to the first deflector, the second deflector, and the shaft, the hinge coupling the first deflector to the shaft and the second deflector to the shaft; wherein the first deflector and the second deflector are configured to simultaneously pivot about an axis of rotation through a center of the shaft from the closed positions to respective first and second open positions. ### Claim 3 (depends on 2) The aircraft of claim 2, wherein a length of the first deflector is approximately equal to a length of the second deflector. ### Claim 4 (depends on 2) The aircraft of claim 2, wherein the junction where the yaw control device is positioned has a structural depth that is greater than a structural depth of the wing. ### Claim 5 (depends on 2) The aircraft of claim 2, wherein the yaw control device is positioned offset from a centerline of the aircraft and outboard of an engine bay. ### Claim 6 (depends on 2) The aircraft of claim 2, wherein the first deflector and the second deflector are each configured to open such that the first and the second deflectors each have an angle of incidence to an airflow. ### Claim 7 (depends on 2) The aircraft of claim 2, further comprising: a second wing on an opposite side of the aircraft, the second wing positioned, adjacent to the body; and a second yaw control device positioned proximate to a junction where the body and the second wing meet, wherein the first and second yaw control devices are positioned symmetrically about a centerline of the aircraft. ### Claim 8 (depends on 2) The aircraft of claim 2, wherein the yaw control device is positioned at a distance from a trailing edge control device, wherein the yaw control device is positioned inboard from the trailing edge control device. ### Claim 9 (depends on 2) The aircraft of claim 2, wherein the wing comprises a leading edge and a trailing edge, and the first deflector is positioned away from the leading edge such that the leading edge comprises a first continuous edge when the first deflector is in the first open position and the second deflector is positioned away from the trailing edge such that the trailing edge comprises a second continuous edge when the second deflector is in the second open position. ### Claim 10 (depends on 2) The aircraft of claim 2, wherein the aircraft comprises a tailless aircraft. ### Claim 11 (depends on 2) The aircraft of claim 2, further comprising a shaft positioned within the aircraft, the shaft configured to actuate the first deflector and the second deflector of the yaw control device. ### Claim 12 (depends on 2) The aircraft of claim 2, wherein the yaw control device is positioned on an aft shelf of the body of the aircraft. ### Claim 13 (depends on 2) The aircraft of claim 2, wherein the first deflector pivots upwards from the top surface of the body and the second deflector pivots downwards from the bottom surface of the body. ### Claim 14 An apparatus, comprising: a first deflector configured to couple to a shaft of an aircraft and form part of a top surface of a body of the aircraft when in a first closed position; and a second deflector configured to couple to the shaft and form part of a bottom surface of the body when in a second closed position; a hinge connected to the first deflector, the second deflector, and the shaft, the hinge coupling the first deflector to the shaft and the second deflector to the shaft; wherein: the first deflector and the second deflector are configured to be positioned at a junction of the body of the aircraft and a wing of the aircraft, all of the first deflector positioned on the body proximate to the junction when in a closed position and all of the second deflector positioned on the body proximate to the junction when in a closed position and the first deflector and the second deflector are configured to simultaneously pivot about an axis of rotation through a center of the shaft from the closed positions to respective first and second open positions upon actuation of the shaft. ### Claim 15 (depends on 14) The apparatus of claim 14, wherein a length of the first deflector is approximately equal to a length of the second deflector. ### Claim 16 (depends on 14) The apparatus of claim 14, wherein the junction where the yaw control device is positioned has a structural depth that is greater than a structural depth of the wing. ### Claim 17 (depends on 14) The apparatus of claim 14, wherein the yaw control device is positioned onset from a centerline of the aircraft and outboard of an engine bay. ### Claim 18 (depends on 14) The apparatus of claim 14, wherein the first deflector and the second deflector are each configured to open such that the first and the second deflectors each have an angle of incidence to an airflow. ### Claim 19 (depends on 14) The apparatus of claim 14, wherein the yaw control device is positioned at a distance from a trailing edge control device, wherein the yaw control device is positioned inboard from the trailing edge control device. ### Claim 20 (depends on 14) The apparatus of claim 14, wherein the yaw control device is configured to be positioned on an aft shelf of the body of the aircraft.