An aircraft defining an upright orientation and an inverted orientation, a ground station; and a control system for remotely controlling the flight of the aircraft. The ground station has an auto-land function that causes the aircraft to invert, stall, and controllably land in the inverted orientati
An aircraft defining an upright orientation and an inverted orientation, a ground station; and a control system for remotely controlling the flight of the aircraft. The ground station has an auto-land function that causes the aircraft to invert, stall, and controllably land in the inverted orientation to protect a payload and a rudder extending down from the aircraft. In the upright orientation, the ground station depicts the view from a first aircraft camera. When switching to the inverted orientation: (1) the ground station depicts the view from a second aircraft camera, (2) the aircraft switches the colors of red and green wing lights, extends the ailerons to act as inverted flaps, and (3) the control system adapts a ground station controller for the inverted orientation. The aircraft landing gear is an expanded polypropylene pad located above the wing when the aircraft is in the upright orientation.
대표청구항▼
1. A method of rapidly descending an aircraft to land at a landing location, the aircraft having a wing including an upper surface and a lower surface defining an upright orientation for normal aircraft flight, and an inverted orientation for inverted flight, the upper surface being gravitationally
1. A method of rapidly descending an aircraft to land at a landing location, the aircraft having a wing including an upper surface and a lower surface defining an upright orientation for normal aircraft flight, and an inverted orientation for inverted flight, the upper surface being gravitationally above the lower surface while in the upright orientation, and the lower surface being gravitationally above the upper surface while in the inverted orientation, comprising: (a) controlling the operation of one or more control surfaces to approach the landing location while the aircraft is flying in the upright orientation;(b) controlling the operation of the one or more control surfaces to invert the aircraft such that it is controllably moving in an inverted orientation;(c) after step (b), controlling the operation of the one or more control surfaces to at least partially stall the wing while in the inverted orientation to provide for the aircraft to rapidly descend; and(d) during step (c), controlling a rate of the descent by controlling depth of the wing stall. 2. The method of claim 1, wherein the one or more control surfaces include a rudder on an empennage, wherein step (c) includes controlling a direction of the decent by controlling the rudder. 3. An unmanned aircraft system, comprising: an aircraft including a wing having an upper surface and a lower surface defining an upright orientation for normal aircraft flight and an inverted orientation for inverted flight, the upper surface being gravitationally above the lower surface while in the upright orientation, and the lower surface being gravitationally above the upper surface while in the inverted orientation, and further including one or more control surfaces;a remote-control station; anda remote-control control system programmed for a user to remotely control the flight of the aircraft using the remote-control station;wherein the remote-control station is provided with an auto-land function that instructs the control system to automatically control the one or more control surfaces such that the aircraft conducts an inverting maneuver in which the aircraft rotates from the upright orientation to the inverted orientation, and such that the wing is at least partially stalled while the aircraft is in the inverted orientation; andwherein the control system is programmed to control an aircraft rate of descent by controlling depth of the wing stall after the inverting maneuver is completed. 4. The unmanned aircraft system of claim 3, wherein the one or more control surfaces include a rudder on an empennage, and wherein the control system is programmed to control a direction of the decent by controlling the rudder while the aircraft is inverted. 5. The method of claim 2, wherein the empennage includes one or more elevators, and wherein the rudder extends downward from and only below the one or more elevators when the aircraft is in the upright orientation. 6. The unmanned aircraft system of claim 4, wherein the empennage includes one or more elevators, and wherein the rudder extends downward from and only below the one or more elevators when the aircraft is in the upright orientation. 7. A method of rapidly descending an aircraft to land at a landing location, the aircraft having a wing including an upper surface and a lower surface defining an upright orientation for normal aircraft flight, and an inverted orientation for inverted flight, the upper surface being gravitationally above the lower surface while in the upright orientation, and the lower surface being gravitationally above the upper surface while in the inverted orientation, comprising: (a) controlling the operation of one or more control surfaces to approach the landing location while the aircraft is flying in the upright orientation;(b) controlling the operation of the one or more control surfaces to invert the aircraft such that it is controllably moving in an inverted orientation; and(c) controlling the operation of the one or more control surfaces subsequent to achieving the inverted orientation to at least partially stall the wing while in the inverted orientation to provide for the aircraft to rapidly descend;wherein the one or more control surfaces include a rudder on an empennage; andwherein step (c) includes controlling a direction of the decent by controlling the rudder. 8. The method of claim 7, wherein the empennage includes one or more elevators, and wherein the rudder extends downward from and only below the one or more elevators when the aircraft is in the upright orientation. 9. An unmanned aircraft system, comprising: an aircraft including a wing having an upper surface and a lower surface defining an upright orientation for normal aircraft flight and an inverted orientation for inverted flight, the upper surface being gravitationally above the lower surface while in the upright orientation, and the lower surface being gravitationally above the upper surface while in the inverted orientation, and further including one or more control surfaces;a remote-control station; anda remote-control control system programmed for a user to remotely control the flight of the aircraft using the remote-control station;wherein the remote-control station is provided with an auto-land function that instructs the control system to automatically control the one or more control surfaces such that the aircraft conducts an inverting maneuver in which the aircraft rotates from the upright orientation to the inverted orientation, such that the wing is at least partially stalled while the aircraft is in the inverted orientation, and such that the depth of stall is actively controlled; andwherein the one or more control surfaces include a rudder on an empennage, and wherein the control system is programmed to control a direction of the decent by controlling the rudder while the aircraft is inverted. 10. The unmanned aircraft system of claim 9, wherein the empennage includes one or more elevators, and wherein the rudder extends downward from and only below the one or more elevators when the aircraft is in the upright orientation.
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