Method of operating a production line

1. A method of manufacturing an aircraft comprising the steps of:

supporting a plurality of aircraft components on a plurality of crawlers, each of the crawlers comprising at least one rolling track and a structural support for supporting the aircraft components;

opposing a first plurality of lifting magnets coupled to an interior surface of said at least one rolling track and a second plurality of lifting magnets coupled to an exterior surface of the structural support to lift the structural support, such that the structural support floats between and within said at least one rolling track;

adjusting magnetic fields experienced by said first and second plurality of lift magnets to translate said at least one rolling track, such that said crawlers move along the production line to a plurality of stations;

generating a plurality of magnetic stability fields;

cooling a plurality of superconducting devices to a temperature approximately between 60 and 80 Kelvin

generating current within the plurality of superconducting devices of said crawlers to counteract changes in said magnetic stability fields, such that the rolling track is stabilized relative to the structural support; and

performing at least one manufacturing task at each of said plurality of stations to manufacture the aircraft.

2. The method as in claim 1 , wherein adjusting the magnetic fields controls the speed and direction of travel of the crawlers.

3. The method as in claim 1 , further comprising:

generating speed signals indicative of a speed of said at least one rolling track; and

adjusting said magnetic fields in response to said speed signals to adjust the speed of said at least one rolling track.

4. The method as in claim 3 , further comprising adjusting a direction of travel of the at least one rolling track by changing the polarity of the magnetic fields in response to said speed signals.

5. The method as in claim 4 , further comprising:

generating location signals indicative of locations of said plurality of crawlers; and

adjusting said magnetic fields in response to said location signals.

6. A method of operating a production line comprising the steps of:

supporting equipment in the production line on a plurality of crawlers comprising at least one rolling track and a structural support for supporting the equipment;

opposing a first plurality of lifting magnets coupled to an interior surface of said at least one rolling track and a second plurality of lifting magnets coupled to an exterior surface of said structure support to lift the structural support, such that the structural support floats between and within said at least one rolling track;

adjusting magnetic fields experienced by said first and second plurality of lift magnets to translate said at least one rolling track, such that said crawlers move along the production line;

generating a plurality of magnetic stability fields; and

cooling a plurality of superconducting devices to a temperature approximately between 60 and 80 Kelvin

generating current within a plurality of superconducting devices of said crawlers to counteract changes in said magnetic stability fields, such that the rolling track is stabilized relative to the structural support.

7. The method as in claim 6 , wherein adjusting the magnetic fields controls the speed and direction of travel of the crawlers.

8. The method as in claim 6 , further comprising:

generating speed signals indicative of a speed of said at least one rolling track; and

adjusting said magnetic fields in response to said speed signals to adjust the speed of said at least one rolling track.

9. A method as in claim 8 , further comprising adjusting a direction of travel of the at least one rolling track by changing the polarity of the magnetic fields in response to said speed signals.

10. The method as in claim 6 , further comprising:

generating location signals indicative of locations of said plurality of crawlers; and

adjusting said magnetic fields in response to said location signals.

11. The method as in claim 6 , further comprising:

generating speed signals indicative of a speed of said at least one rolling track;

adjusting said magnetic fields in response to said speed signals to adjust the speed of said at least one rolling track; and

adjusting a direction of travel of the at least one rolling track by changing the polarity of the magnetic fields in response to said speed signals.

12. The method as in claim 6 , wherein the plurality of magnetic stability fields are generated by a first set of stability magnets outwardly residing on said at least one rolling track and a second set of stability magnets inwardly residing on said at least one rolling track.

13. The method as in claim 12 , wherein at least a portion of said plurality of lifting magnets reside between said first set of stability magnets and said second set of stability magnets.

14. The method as in claim 6 , further comprising supporting the equipment on a cradle coupled to and supported by said structural support, said cradle hanging below a top surface of said plurality of crawlers.

15. The method as in claim 14 , wherein said cradle hangs below a top surface of said at least one rolling track.

16. The method as in claim 14 , wherein said cradle hangs below a top surface of said structural support.

17. A method of supporting equipment in a production line comprising the steps of:

providing a crawler comprising at least one rolling track and a structural support for supporting the equipment;

opposing a first plurality of lifting magnets coupled to and extending around an interior surface of said rolling track and a second plurality of lifting magnets coupled to and extending around an exterior surface of said structure support to lift the structural support, such that the structural support floats between and within said rolling track;

adjusting magnetic fields experienced by said first and second plurality of lift magnets to translate said rolling track, such that said crawler moves along the production line;

providing a first set of stability magnets outwardly residing on said rolling track and a second set of stability magnets inwardly residing on said rolling track to generate a plurality of magnetic stability fields, such that at least a portion of said plurality of lifting magnets reside between said first set of stability magnets and said second set of stability magnets; and

generating current within a plurality of superconducting devices of said crawler to counteract changes in said magnetic stability fields and prevent shifting between said rolling track and the structural support.

18. The method as in claim 17 , further comprising cooling said plurality of superconducting devices to a temperature approximately between 60 and 80 Kelvin.

19. The method as in claim 17 , further comprising:

generating speed signals indicative of a speed of said rolling track;

adjusting said magnetic fields in response to said speed signals to adjust the speed of said at least one rolling track; and

adjusting a direction of travel of the at least one rolling track by changing the polarity of the magnetic fields in response to said speed signals.