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An aircraft includes a housing and a powerplant coupled to the housing and configured to rotate a drive shaft around its longitudinal axis. The aircraft may include at least one lift fan assembly coupled to its housing and including a gearbox and at least one lift fan. The gearbox is coupled to the

An aircraft includes a housing and a powerplant coupled to the housing and configured to rotate a drive shaft around its longitudinal axis. The aircraft may include at least one lift fan assembly coupled to its housing and including a gearbox and at least one lift fan. The gearbox is coupled to the drive shaft and configured to transfer rotational energy from the drive shaft to the lift fan or fans. The lift fan assembly or assemblies may include at least two pivot assemblies, the first pivot assembly configured to pivot the lift fan assembly on a first axis and the second pivot assembly configured to pivot the lift fan assembly on a second axis that is substantially perpendicular to the first axis.

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1. An aircraft comprising: an aircraft housing;an input drive shaft having a longitudinal axis;a powerplant coupled to the housing and configured to rotate the input drive shaft around the longitudinal axis thereof;at least two lift fan assemblies coupled to the aircraft housing, each including a ge

1. An aircraft comprising: an aircraft housing;an input drive shaft having a longitudinal axis;a powerplant coupled to the housing and configured to rotate the input drive shaft around the longitudinal axis thereof;at least two lift fan assemblies coupled to the aircraft housing, each including a gearbox and at least one lift fan coupled thereto, wherein the input drive shaft is coupled to the gearbox to transfer rotational energy thereto and wherein each fan assembly further includes a first actuator mounted on at least one of a support shaft or the aircraft housing and the first actuator including a linear actuator or a rotary actuator, and each fan assembly further includes a second actuator coupled to the support shaft and mounted to the aircraft housing, the second actuator includes a linear actuator or a rotary actuator; andat least two pivot assemblies for each of the at least two lift fan assemblies, including a first pivot assembly configured to pivot a lift fan assembly on a first axis by movement of the first actuator, and a second pivot assembly configured to pivot a lift fan assembly on a second axis substantially perpendicular to the first axis by the movement of the second actuator, wherein each lift fan assembly is pivoted independently on at least one axis. 2. The aircraft of claim 1, the aircraft housing comprising: a fuselage;a first wing attached to a side of the fuselage; anda second wing attached to a side of the fuselage opposite the first wing. 3. The aircraft of claim 1, wherein the at least two lift fan assemblies are coupled to the aircraft housing. 4. The aircraft of claim 2, the at least two lift fan assemblies comprising: a first lift fan assembly coupled to the first wing; anda second lift fan assembly coupled to the second wing. 5. The aircraft of claim 1, the at least one lift fan comprising two lift fans configured to counter-rotate. 6. The aircraft of claim 1, wherein the powerplant is selected from one of: a turboshaft engine, a turboprop engine, a turbofan engine and an internal combustion engine. 7. The aircraft of claim 1, wherein the aircraft is configured for vertical take off and landing. 8. The aircraft of claim 1, wherein the aircraft is configured for short take off and vertical landing. 9. The aircraft of claim 1, wherein the aircraft is configured for short take off and landing. 10. The aircraft of claim 1, the gearbox comprising: an outer enclosure;an output drive shaft coupled to the at least one lift fan; anda gearbox assembly within the outer enclosure coupled to the input drive shaft and configured to transfer rotational force of the input drive shaft to rotational force on the output drive shaft. 11. The aircraft of claim 1, each of the at least two lift fan assemblies further comprising: a duct coupled to the input drive shaft and configured to enclose each of the at least two lift fan assemblies, the at least two pivot assemblies coupled to the outside of the duct. 12. The aircraft of claim 1, further comprising an output drive shaft coupled to the at least one lift fan. 13. The aircraft of claim 12, wherein the output drive shaft is entirely enclosed within the gearbox. 14. A pivotable lift fan assembly adapted for coupling to longitudinally rotatable input drive shaft of an aircraft, comprising: at least one lift fan;a gearbox coupled to the input drive shaft to transfer rotational energy therefrom, and coupled to the at least one lift fan;a first actuator mounted on at least one of a support shaft of the aircraft or a housing of the aircraft; the first actuator including a linear actuator or a rotary actuator,a second actuator coupled to the support shaft and mounted to the housing of the aircraft, the second actuator including a linear actuator or a rotary actuator; andat least two pivot assemblies, including a first pivot assembly configured to pivot the at least one lift fan assembly on a first axis by movement of the first actuator, and a second pivot assembly configured to pivot the at least one lift fan assembly on a second axis substantially perpendicular to the first axis by the movement of the second actuator. 15. The pivotable lift fan assembly of claim 14, the at least one lift fan comprising two lift fans configured to counter-rotate. 16. The pivotable lift fan assembly of claim 14, the gearbox comprising: an outer enclosure;an output drive shaft coupled to the at least one lift fan; anda gearbox assembly within the outer enclosure coupled to the input drive shaft and configured to transfer rotational force of the input drive shaft to rotational force on the output drive shaft. 17. The pivotable lift fan assembly of claim 14, further comprising: a duct coupled to the input drive shaft and configured to enclose the lift fan assembly, the at least two pivot assemblies coupled to the outside of the duct. 18. The pivotable lift fan assembly of claim 14, further comprising an output drive shaft coupled to the at least one lift fan. 19. The aircraft of claim 18, wherein the output drive shaft is entirely enclosed within the gearbox. 20. An aircraft comprising: an aircraft housing;an input drive shaft having a longitudinal axis;a powerplant coupled to the housing and configured to rotate the input drive shaft around the longitudinal axis thereof;a single lift fan assembly coupled to the aircraft housing, including a gearbox and at least one lift fan coupled thereto, wherein the input drive shaft is coupled to the gearbox to transfer rotational energy thereto and wherein the fan assembly further includes a first actuator mounted on at least one of a support shaft or the aircraft housing and the first actuator including a linear actuator or a rotary actuator, and the fan assembly further includes a second actuator coupled to the support shaft and mounted to the aircraft housing, the second actuator includes a linear actuator or a rotary actuator; andat least two pivot assemblies, including a first pivot assembly configured to pivot the single lift fan assembly on a first axis by movement of the first actuator, and a second pivot assembly configured to pivot the single lift fan assembly on a second axis substantially perpendicular to the first axis by the movement of the second actuator. 21. The aircraft of claim 20, the aircraft housing comprising: a fuselage;a first wing attached to a side of the fuselage; anda second wing attached to a side of the fuselage opposite the first wing. 22. The aircraft of claim 21, wherein the single lift fan assembly is coupled to the fuselage. 23. The aircraft of claim 20, wherein the powerplant is selected from one of: a turboshaft engine, a turboprop engine, a turbofan engine and an internal combustion engine. 24. The aircraft of claim 20, wherein the aircraft is configured for vertical take off and landing. 25. The aircraft of claim 20, wherein the aircraft is configured for short take off and vertical landing. 26. The aircraft of claim 20, wherein the aircraft is configured for short take off and landing. 27. The aircraft of claim 20, the gearbox comprising: an outer enclosure;an output drive shaft coupled to the at least one lift fan; anda gearbox assembly within the outer enclosure coupled to the input drive shaft and configured to transfer rotational force of the input drive shaft to rotational force on the output drive shaft. 28. The aircraft of claim 20, the single lift fan assembly further comprising: a duct coupled to the input drive shaft and configured to enclose the single lift fan assembly, the at least two pivot assemblies coupled to the outside of the duct. 29. The aircraft of claim 20, further comprising an output drive shaft coupled to the at least one lift fan. 30. The aircraft of claim 29, wherein the output drive shaft is entirely enclosed within the gearbox.