3.145 Directional stability and control
(a) There shall be no uncontrollable looping tendency in 90-degree cross winds up to a velocity equal to 0.2 Vs0 at any speed at which the aircraft may be expected to be operated upon the ground or water.
I don't want to argue the toss about the legality (or otherwise) of landing at above the "Demonstrated" figure, but the above value rather intrigues me. It appears to be very pessimistic even by the standards of "average" pilots.
In my machines case this is barely 5kts, and would hardly be noticeable. In practice (and backed up by some of the claims on here) a value of 0.3 - 0.4 would be more realistic. Or in the case of Chuck Ellsworth's Dakota 1.0!!
I really wonder if I shouldn't give up flying until such time as scientists can control the weather, or
every airfield has multiple runways.