(documentationrollEnglishLanguage "roll is the rotation around the longitudinalAxis. A positive rolling motion lifts the left wing and lowers the right wing. The pilot rolls by increasing the lift on one wing and decreasing it on the other. This changes the bank angle.The ailerons are the primary control of roll. The rudder also has a secondary effect on roll.It is measured as planeAngleMeasure between the vehicle's transverseAxis and its tangential LevelPlaneFn with the earth.[Wikipedia]")