Texel actualy decribed three formula's for three complementatry windspeed segments, but the users decided to use just the general middle section number. Much like most or many use just the D-PN in all windstrengths.



So in fact the Texel formula decribed the curves which are definately the better decribtion of the speed characteristic by three lineair relationships together approximating the speed curve.



So Texel was created less simplistic than it is used now.



Wouter