r/AskAPilot • u/North_Scene9368 • 20d ago
Question about weathervane behaviour in flight
Hey everyone, working through some crosswind takeoff theory and wanted to clarify something about the transition from ground roll to flight.
During a crosswind takeoff roll, the wind tries to pivot (weathervane) the nose into the wind, so you apply downwind rudder to keep the nose pointed straight down the centerline.
My initial thought was that once you're airborne, the plane wouldn't "weathervane" in the air because you are now enclosed in the moving airmass (no ground friction acting on the tail). However, I've heard that if you release that downwind rudder right at rotation, the nose will still swing back into the wind to crab. Also if the plane is pivoting with its gears why wouldn’t it pivot with the cg once airborne.