I have an RC Flying Wing that uses elevons for control. To go up both elevons move upwards and the wing pitches up. Both go down and the wing pitches down. I’m OK with this.
However, if I want to roll right, looking from the rear of the wing, the left hand elevon goes down and the right hand one goes up. I can see this when I fly it that it rolls right but don’t understand why?
If an upward pitch angle produces lift to go up, (like when the elevons act as elevators) then why doesn’t the right wing produce more lift and thus the wing roll left? Either a flap produces lift or doesn’t?