Landing x-wind reduction as rcr increases
Good evening all, let me pick your brains if I may.
An old Boeing 4 jet has a x-wind limitation graph that, as you would expect, shows a greater x-wind max value as the rcr goes up. But then it hits a max value and any subsequent increase in rcr actually decreases the x-wind limitation. For a light aircraft, it loses up to 3 kts, for a max weight aircraft, up to 7 kts. I have racked my feeble brain, but cannot think why this would be. I've thought about tyre to surface contact, derived momentum as the aircraft tries to centralise from a crabbed approach etc etc, but can't come up with a good reason. In disgust I'm off for a large Lagavulin, but if the collective PPrune knowledge base can enlighten me, I'd be very, very grateful!!