Originally Posted by
applecrumble
Hello,
I have seen a post quite some time ago regarding this. I’m curious as to the aerodynamics. Boeing mention it in the FCTM. The effect is that during a crosswind takeoff initially the rudder is counter to that expected given the direction of the crosswind. For instance if there was a crosswind from the right then initially right rudder would be required before left rudder being required as usual at about 20 knots ground speed.
I’m not sure the previous thread got to the bottom of it. This counter intuitive rudder seems to be due to the airflow turning to be directed into the engine. I personally can’t quite see this so if anyone could explain then would be appreciated. Thank you.
On the four types I've flown (all Boeing and Airbus) I've never noticed having to apply anything other than left rudder in a right crosswind. Nothing in the very early stages, then appropriate rudder as the airspeed comes alive. Maybe it's more noticeable on aircraft types under 60 tons?