Just prior to touchdown the crab angle keeps the airframe lined with the runway, after touch down the crab angle is reduced to zero very shortly after touch down by the friction and vector mass of the airframe.
Because this statement might lead some not so well trained mumpties into believing they did not need to be so immediately aggressive with those 2 pedals to align the a/c with the rwy centreline; it will happen automatically all by itself. Therefore I thought it prudent to remind others of what you & I know to be the truth.
Last edited by RAT 5; 19th Feb 2015 at 09:14.