Aircraft coupling mechanism

1. A male part for coupling aircraft to one another, the male part comprising:

a wall forming a shaft, wherein the wall is directly connected to one of a forward end and an aft end of a fuselage of a first aircraft;

an attachment mechanism to regulate a mechanical engagement between the shaft on the male part and a female part directly connected one of a forward end and an aft end of a fuselage of a second aircraft while the first aircraft and the second aircraft are airborne, the female part is connected to the second aircraft such that the female part is neither extensible nor retractable relative to the second aircraft, the female part comprising a wall forming a cone around a cavity for guiding the shaft into the cavity, wherein the attachment mechanism is operable to switch between an engaged position and a disengaged position, and wherein

in the engaged position, the attachment mechanism initiates the mechanical engagement to rigidly attach the first aircraft and the second aircraft to one another such that the first and second aircraft are arranged end-to-end, and

in the disengaged position, the attachment mechanism discontinues the mechanical engagement to detach the first aircraft and the second aircraft from one another;

a first propeller shroud surrounding less than all of a first propeller of the first aircraft, the first propeller shroud including at least one first shroud coupling element;

a second propeller shroud separate and independent from the first propeller shroud surrounding less than all of a second propelier of the first aircraft, the second propelier shroud including at least one first shroud coupling element;

a third propeller shroud surrounding less than all of a first propeller of the second aircraft, the third propeller shroud including at least one second shroud coupling element;

a fourth propeller shroud separate and independent from the third propeller shroud surrounding less than all of a second propeller of the second aircraft, the fourth propeller shroud including at least one second shroud coupling element;

wherein in the engaged position, the first shroud coupling elements mate with the second shroud coupling elements.

2. The male part of claim 1 , wherein:

in the engaged position, the attachment mechanism is configured to inhibit relative movement between the first aircraft and the second aircraft to one another based on a moment transferred between the first aircraft and the second aircraft via the attachment mechanism; and

in the disengaged position, the first aircraft and the second aircraft are configured to move with relative to one another.

3. The male part of claim 1 , wherein the attachment mechanism comprises a fastener selected from the group consisting of: a male thread, a female thread, a latch, an indentation, a hook-and-loop fastener, a pin, a lock bolt, a magnet, a bladder, an adhesive material, a grapple, a welding element, and a screw.

4. The male part of claim 1 , wherein each of the first aircraft and the second aircraft are operable to independently transport, during flight, a maximum payload, and wherein the first aircraft and the second aircraft are rigidly attached to one another by the male part and the female part and are operable to collectively transport an increased payload during flight, wherein the increased payload is greater than the maximum payload.

5. The male part of claim 1 , wherein the attachment mechanism is operable to generate a relative rotation between the male part and the female part.

6. The male part of claim 1 , wherein the attachment mechanism comprises:

a male thread extending from the wall; and

wherein the mechanical engagement comprises the male thread interlocking with a female thread on the female part on the second aircraft.

7. The male part of claim 1 , wherein the attachment mechanism comprises:

a female thread recessed into the wall; and

wherein the mechanical engagement comprises the female thread interlocking with a male thread on the female part on the second aircraft.

8. A female part for coupling aircraft to one another, the female part comprising:

a wall forming a cone around a cavity, wherein the wall is directly connected to one of a forward end and an aft end of a fuselage of a first aircraft;

an attachment mechanism to regulate a mechanical engagement between the cavity on the female part and a male part directly connected one of a forward end and an aft end of a fuselage of a second aircraft while the first aircraft and the second aircraft are airborne, wherein the cone guides the shaft into the cavity and wherein the attachment mechanism is operable to switch between an engaged position and a disengaged position, and wherein

in the engaged position, the attachment mechanism initiates the mechanical engagement to rigidly attach the first aircraft and the second aircraft to one another such that the first and second aircraft are arranged end-to-end, and

in the disengaged position, the attachment mechanism discontinues the mechanical engagement to detach the first aircraft and the second aircraft from one another;

a first propeller shroud surrounding less than all of a first propeller of the first aircraft, the first propeller shroud including at least one first shroud coupling element;

a second propelier shroud separate and independent from the first propelier shroud surrounding less than all of a second propelier of the first aircraft, the second propelier shroud including at least one first shroud coupling element;

a third propeller shroud surrounding less than all of a first propeller of the second aircraft, the third propeller shroud including at least one second shroud coupling element;

a fourth propeller shroud separate and independent from the third propeller shroud surrounding less than all of a second propeller of the second aircraft, the fourth propeller shroud including at least one second shroud coupling element;

wherein in the engaged position, the first shroud coupling elements mate with the second shroud coupling elements.

9. The female part of claim 8 , wherein:

in the engaged position, the attachment mechanism is configured to inhibit relative movement between the first aircraft and the second aircraft to one another based on a moment transferred between the first aircraft and the second aircraft via the attachment mechanism; and

in the disengaged position, the first aircraft and the second aircraft are configured to move with relative to one another.

10. The female part of claim 8 , wherein the attachment mechanism comprises a fastener selected from the group consisting of: a male thread, a female thread, a latch, a recession, a hook-and-loop fastener, a pin, a lock bolt, a bladder, an adhesive material, a grapple, a welding element, and a screw.

11. The female part of claim 8 , wherein the cavity comprises:

a male thread attached to the wall; and

wherein the mechanical engagement comprises the male thread interlocking with a female thread on the male part on the second aircraft.

12. The female part of claim 8 , wherein the cavity comprises:

a female thread recessed into the wall; and

wherein the mechanical engagement comprises the female thread interlocking with a male thread on the male part on the second aircraft.

13. A coupling system for coupling two or more aircraft to one another, the coupling system comprising:

a male part comprising a shaft and a first fastener to attach the male part directly to one of a forward end and an aft end of fuselage of a first aircraft;

a female part comprising a cone around a cavity, the cone for guiding the shaft into the cavity, and a second fastener to attach the female part directly to one of a forward end and an aft end of a fuselage of a second aircraft such that the cone is neither extensible from nor retractable to the second aircraft;

an attachment mechanism to regulate a mechanical engagement between the shaft on the male part and the cavity on female part while the first aircraft and the second aircraft are airborne, wherein the attachment mechanism is operable to switch between an engaged position and a disengaged position, and wherein

in the engaged position, the attachment mechanism initiates the mechanical engagement to rigidly attach the first aircraft and the second aircraft to one another such that the first and second aircrafts are arranged end-to-end, and

in the disengaged position, the attachment mechanism discontinues the mechanical engagement to detach the first aircraft and the second aircraft from one another;

a first propeller shroud surrounding less than all of a first propeller of the first aircraft, the first propeller shroud including at least one first shroud coupling element;

a second propelier shroud separate and independent from the first propelier shroud surrounding less than all of a second propelier of the first aircraft, the second propelier shroud including at least one first shroud coupling element;

a third propeller shroud surrounding less than all of a first propeller of the second aircraft, the third propeller shroud including at least one second shroud coupling element;

a fourth propeller shroud separate and independent from the third propeller shroud surrounding less than all of a second propeller of the second aircraft, the fourth propeller shroud including at least one second shroud coupling element;

wherein in the engaged position, the first shroud coupling elements mate with the second shroud coupling elements.

14. The coupling system of claim 13 , wherein:

in the engaged position, the attachment mechanism is configured to inhibit relative movement between the first aircraft and the second aircraft to one another based on a moment transferred between the first aircraft and the second aircraft via the attachment mechanism; and

in the disengaged position, the first aircraft and the second aircraft are configured to move with relative to one another.

15. The coupling system of claim 13 , wherein the attachment mechanism comprises:

a male thread extending from the shaft; and

wherein the mechanical engagement comprises the male thread interlocking with a female thread on the female part on the second aircraft.

16. The coupling system of claim 13 , wherein the attachment mechanism comprises:

a female thread recessed into a wall of the cavity; and

wherein the mechanical engagement comprises the female thread interlocking with a male thread on the female part on the second aircraft.