Gnadenburg. Thanks for the excellent reply - I was writing from recollection which is probably not the same as facts as you have shown. Although I am not short of big jet hours and some fighter jet as well, I was surprised to read in your post that CASA demanded demonstration of high speed below 10 descents. As a former member of that esteemed organisation I can say with some truth that they employed some eccentrics in flying ops and insisting on high speed demos - no doubt with a full load of passengers -seems the work of an eccentric to me.