Editing Tiltrotor (section)

==Mono tiltrotor==
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A mono tiltrotor aircraft uses a tiltable rotating [[Propeller (aircraft)|propeller]], or ''[[Coaxial rotors|coaxial proprotor]]'', for [[lift (force)|lift]] and [[thrust|propulsion]]. For vertical flight the proprotor is angled to direct its thrust downwards, providing lift. In this mode of operation the craft is essentially identical to a helicopter. As the craft gains speed, the coaxial proprotor is slowly tilted forward, with the blades eventually becoming [[perpendicular]] to the ground. In this mode the wing provides the lift, and the wing's greater efficiency helps the tiltrotor achieve its high speed. In this mode, the craft is essentially a turboprop aircraft.

A mono tiltrotor aircraft is different from a conventional tiltrotor in which the proprotors are mounted to the [[wing tip]]s, in that the ''coaxial proprotor'' is mounted to the aircraft's [[fuselage]].  As a result of this structural efficiency, a mono tiltrotor exceeds the transport efficiency (speed times payload) of both a helicopter and a conventional tiltrotor.  [[Baldwin Mono Tiltrotor|One design study]] concluded that if the mono tiltrotor could be technically realized, it would be half the size, one-third the weight, and nearly twice as fast as a helicopter.<ref name=ONR1>[https://web.archive.org/web/20141220233611/http://handle.dtic.mil/100.2/ADA428702 Article title] Leishman, J. G., Preator, R., Baldwin, G. D., Conceptual Design Studies of a Mono Tiltrotor (MTR) Architecture, U.S. Navy Contract Number: N00014-03-C-0531, 2004.</ref>

In vertical flight, the mono tiltrotor uses controls very similar to a coaxial helicopter, such as the [[Kamov Ka-50]]. [[Yaw (flight)|Yaw]] is controlled for instance by increasing the lift on the upper proprotor while decreasing the lift on the lower proprotor.  [[Roll (flight)|Roll]] and [[Pitch (flight)|pitch]] are provided through rotor cyclic. Vertical motion is controlled with conventional rotor blade [[blade pitch]].<ref name=MTR_AHS_Jan07>{{cite web |url=http://www.baldwintechnology.com/MTR_AHS_Jan07.pdf |title=Archived copy |access-date=2009-06-05 |url-status=dead |archive-url=https://web.archive.org/web/20081007162342/http://www.baldwintechnology.com/MTR_AHS_Jan07.pdf |archive-date=2008-10-07 }} Baldwin, G. D., 'Preliminary Design Studies of a Mono Tiltrotor (MTR) with Demonstrations of Aerodynamic Wing Deployment', AHS International Specialists Meeting, Chandler, Arizona, January 23–25, 2007.</ref>