Saw one of these at RIAT at RAF Cottesmore about 4 or 5 years ago and also at RAF Mildenhall when they used to do airshows there. It is one mean mother of an aircraft. it's an awsome sight seeing & hearing it take off.
Even the APU is powerful on this thing, I was onboard during ground runs prior to an Airshow at Finningley. As I remember it's a 2 stage jobber and the whole aircraft lurches when it powers up. Lovely jubbly