Electric unmanned aerial vehicle launcher
Embodiments of the present invention provide improvements to UAV launching systems. The disclosed launching system eliminates the use of hydraulic fluid and compressed nitrogen or air by providing an electric motor-driven tape that causes movement of a shuttle along a launcher rail. The shuttle is detachable from the motor-driven tape, such that stoppage of the tape can be separate from stoppage of the shuttle. Embodiments further provide a secondary arrestment strap. Further embodiments provide an anti-rollback latch system.
1. A launching system for an unmanned aerial vehicle, comprising:
(a) a launcher rail;
(b) a shuttle configured to travel along the launcher rail;
(c) a drive mechanism for moving the shuttle along the launcher rail, the drive mechanism comprising (i) a length of tape running along the launcher rail, (ii) an electric drive motor that drives movement of the tape, and (iii) a drive reel to which one end of the tape is secured and around which the tape is wound during launch, wherein the shuttle is detachably secured to the tape via a rotary assembly system and a pawl, wherein engagement of the pawl with respect to the rotary assembly maintains attachment of the shuttle to the tape, wherein release of the pawl from the rotary assembly allows the shuttle to release from the tape.
2. The launching system of claim 1 , wherein the rotary assembly comprises first and second wheels with first and second rods extending therebetween, the first and second rods defining a space around which the tape may be wound.
3. The launching system of claim 2 , wherein the first and second wheels comprise a series of notches into which a catch element of the pawl is received.
4. The launching system of claim 1 , wherein the rotary assembly comprises a connection surface at which the rotary assembly is secured to the shuttle.
5. The launching system of claim 1 , wherein the pawl comprises a roller base and wherein the launcher rail comprises a disengagement ramp portion, wherein when the roller base contacts the disengagement ramp portion, the pawl is released from the rotary assembly.
6. The launching system of claim 1 , wherein the tape is wound onto the drive reel during launch to accelerate the shuttle.
7. The launching system of claim 1 , further comprising a payout reel having another end of the tape secured thereto.
8. The launching system of claim 1 , wherein the tape is comprised of a material that offers a degree of cushioning during initial application of launch load.
9. The launching system of claim 1 , wherein the tape comprises nylon or a nylon blend.
10. The launching system of claim 1 , wherein the electric motor is a DC motor.
11. The launching system of claim 1 , wherein the electric motor is powered by a battery.
12. The launching system of claim 1 , wherein the launcher rail comprises an arrestment strap for stopping the shuttle once detached from the tape.
13. The launching system of claim 12 , further comprising a secondary arrestment strap.
14. The launching system of claim 1 , further comprising an anti roll-back latch system.
15. A launching system for an unmanned aerial vehicle, comprising:
(a) a launcher rail;
(b) a tape configured to travel a length of the launcher rail;
(c) a shuttle secured to the tape at a shuttle to tape interface configured to allow the shuttle to detach from the tape upon launch of the unmanned aerial vehicle;
(d) a power reel driven by an electric drive motor that drives movement of the tape;
(e) a payout reel;
(f) a primary arrestment strap to halt movement of the shuttle along the launcher rail after launch; and
(g) a secondary arrestment strap.
16. The launching system of claim 15 , wherein the secondary arrestment strap is positioned further along the launcher rail than the primary arrestment strap and functions as a fail safe back-up.
17. A launching system for an unmanned aerial vehicle, comprising:
(a) a launcher rail;
(b) a tape configured to travel a length of the launcher rail;
(c) a shuttle secured to the tape at a shuttle to tape interface configured to allow the shuttle to detach from the tape upon launch of the unmanned aerial vehicle;
(d) a power reel driven by an electric drive motor that drives movement of the tape;
(e) a payout reel;
(f) an arrestment feature to halt movement of the shuttle along the launcher rail after launch; and
(g) an anti-rollback latch system configured to secure the shuttle to the strap and prevent its rollback after launch.
18. The launching system of claim 17 , wherein the anti-rollback system comprises a pivoting latch and a hinge pin securing the pivoting latch to the shuttle.
19. The launching system of claim 18 , wherein the anti-rollback system further comprises an angled face of the pivoting latch with beveled edges.
20. The launching system of claim 18 , wherein the anti-rollback system further comprises a latch stop configured to stop movement of the pivoting latch and cause its closure against an arrestment feature.