You deliberately Miss my point, as usual. I'm prepared to stand by what I said and my right to say so without being attacked Personally as is far too common here Particularly of late.. I ENCOURAGE Questions (particularly Aviation related) which is the Purpose of this section of Ian Baker's Site. Saying "Googe it" was an answer and what I do Often to check how it corresponds with My recollection BEFORE I post . IT is therefore NOT a "stupid answer". but a Helpful suggestion. Nev