Editing Tiltrotor (section)

===Controls===
In vertical flight, the tiltrotor uses controls very similar to a twin or [[tandem-rotor]] helicopter. [[Yaw (flight)|Yaw]] is controlled by tilting its rotors in opposite directions. [[Roll (flight)|Roll]] is provided through differential power or thrust.  [[Pitch (flight)|Pitch]] is provided through rotor blades [[Helicopter flight controls|cyclic]]-, or [[nacelle]], tilt.  Vertical motion is controlled with conventional rotor [[blade pitch]] and either a conventional helicopter collective control lever (as in the [[Bell/Agusta BA609]]) or a unique control similar to a fixed-wing engine control called a thrust control lever (TCL) (as in the Bell-Boeing [[V-22 Osprey]]).<ref name="Norton V-22">Norton, Bill. ''Bell Boeing V-22 Osprey, Tiltrotor Tactical Transport''. Midland Publishing, 2004. {{ISBN|1-85780-165-2}}.</ref>