Hi Hetfield,
Nothing personal old bean, but I just took the view that Michelda was asking a genuine question and I don't think he would have found your response particularly helpful.
You are quite justified in your observation that this is 'basic knowledge'; however, it has been my experience that many professional pilots (I count myself among them) lack so-called 'basic knowledge' because they may have been poorly trained, missed a particular lesson, have a weakness in one or more subject areas (electrics anyone?) and/or have been discouraged from asking questions for fear of appearing 'unprofessional', when in fact the exact opposite should be the case!
There is an interesting article in this month's 'Flying' magazine, written by the new editor, which expands on this exact topic.
If our colleagues can't ask an honest question here for fear of being shot down, where else should they ask it? In the bar?
By the way, what does p2f mean?
Kind regards,
Eckhard