"Jim Macklin" wrote in message
news:ZPVXf.7715$t22.1714@dukeread08...
It depends on runway length,
departure profile and terrain balanced by aircraft
performance.

Sure does. I remember a CAA safety evening, where the presenter showed a
photo with an aircraft poised to take off with the windsock pointing in
pretty much the same direction, and said: "Why isn't this as mad as it
looks?"

The photo had been cleverly taken/cropped and done at a jaunty angle so that
the pole of the windsock was just off the side of the picture - and there
were no reference points from which you could realise that, in fact, the
runway had a socking great downslope.

D.