Multicopter-assisted system and method for launching and retrieving a fixed-wing aircraft
The present disclosure provides various embodiments of a multicopter-assisted launch and retrieval system generally including: (1) a multi-rotor modular multicopter attachable to (and detachable from) a fixed-wing aircraft to facilitate launch of the fixed-wing aircraft into wing-borne flight; (2) a storage and launch system usable to store the modular multicopter and to facilitate launch of the fixed-wing aircraft into wing-borne flight; and (3) an anchor system usable (along with the multicopter and a flexible capture member) to retrieve the fixed-wing aircraft from wing-borne flight.
1. An anchor system for retrieving an aircraft from flight, the anchor system comprising:
a base;
a breakaway device removably attachable to the base;
a flexible capture member payout and retract device rotatably attachable to the base; and
a biasing element operably connectable to the flexible capture member payout and retract device to bias the flexible capture member payout and retract device against rotating relative to the base in a designated rotational direction.
2. The anchor system of claim 1 , which includes a braking device configured to oppose rotation of the flexible capture member payout and retract device relative to the base.
3. The anchor system of claim 2 , wherein the braking device includes an eddy current brake.
4. The anchor system of claim 1 , wherein the flexible capture member payout and retract device includes a drum rotatably attachable to the base and a flange attached to one side of the drum.
5. The anchor system of claim 4 , wherein the biasing element includes a power spring within the drum.
6. The anchor system of claim 4 , wherein the flange is electrically conductive.
7. The anchor system of claim 1 , wherein the flexible capture member payout and retract device includes a drum rotatably attachable to the base and an electrically conductive flange attached to one side of the drum, and which includes a magnet fixedly attached to the base adjacent the flange so rotation of the flange relative to the magnet induces an eddy current braking force on the flexible capture member payout and retract device that opposes rotation of the flexible capture member payout and retract device.
8. The anchor system of claim 1 , which includes a rotation prevention device movable between: (1) a lock position in which the rotation prevention device prevents rotation of the flexible capture payout and retract device relative to the base in at least one rotational direction; and (2) an unlock position in which the rotation prevention device does not prevent rotation of the flexible capture payout and retract device relative to the base in the at least one rotational direction.
9. The anchor system of claim 1 , wherein the breakaway device includes a hollow shaft and a finger movable between a first position in which a free end of the finger is retained within the hollow shaft and a second position in which the free end of the finger is outside of the hollow shaft.
10. The anchor system of claim 9 , wherein the breakaway device includes a biasing element that prevents the finger from moving from the first position to the second position until a designated tension is applied to the finger.
11. The anchor system of claim 10 , wherein the biasing element includes a spring.
12. The anchor system of claim 11 , wherein the breakaway device includes a collar slidably disposed on the shaft and an upper retaining element at an upper end of the shaft, wherein the spring is disposed around the shaft between the collar and the upper retaining element so movement of the collar toward the upper retaining element compresses the spring.
13. The anchor system of claim 12 , wherein the breakaway device includes a breakaway sleeve removably attachable to the collar, the finger pivotably connected to the breakaway sleeve.
14. The anchor system of claim 13 , wherein the breakaway sleeve defines a finger escape slot therethrough through which the finger passes when moving from the first position to the second position.
15. The anchor system of claim 1 , wherein the designated rotational direction corresponds with payout of a flexible capture member attached to the flexible capture member payout and retract device.
16. An anchor system for retrieving an aircraft from flight, the anchor system comprising:
a base;
a flexible capture member payout and retract device rotatably attachable to the base;
a biasing element operably connectable to the flexible capture member payout and retract device to bias the flexible capture member payout and retract device against rotating relative to the base in a designated rotational direction; and
a braking device configured to oppose rotation of the flexible capture member payout and retract device relative to the base.
17. The anchor system of claim 16 , wherein the braking device includes an eddy current brake.
18. The anchor system of claim 17 , wherein the flexible capture member payout and retract device includes a drum rotatably attached to the base and a flange attached to one side of the drum.
19. The anchor system of claim 18 , wherein the flange is electrically conductive.
20. The anchor system of claim 19 , which includes a magnet fixedly attached to the base adjacent the flange so rotation of the flange relative to the magnet induces an eddy current braking force on the flexible capture member payout and retract device that opposes rotation of the flexible capture member payout and retract device.