Yes, approaching the ground the wind backs 30 degrees and decreases by 50%...going the other way, leaving the air affected by friction of the earth and the wind veers 30 degrees and increases in speed by 50%. I've seen this written in a few places; never seen 25 degrees mentioned.
Agreed, so are we saying that for once the holy grail that is PPL confuser is wrong? Or is it Pratt that is wrong?