Slips
Long time since I was taught this stuff...
I cannot see why the US makes a big deal out of what they call "forward" slips as distinct from "side" slips. The airplane does not know the diffference, and the result is the same. In one case you point the fuselage away from the intended direction of flight, in the other you point it down the runway, but in both you have crossed controls.
Has anything been written about this matter that I can read and quote? I want to understand the difference, if there is any, or to refute the point if there is none, and would need someone with some clout who has written an article or maybe a chapter in a book? I doubt if my word will be taken, and after all, I could be wrong! (if a tree falls in the forest and no-one is around to hear it, why is it still my fault?).