A friend of mine was Capt of a BAC 1-11 for Ford Air out of STN many years ago,did walkround saw snow on wings,but he could blow it off with his own breath,so he thought;if I can do that it will blow off during T/O no problem.He commenced T/O,@ VR tried to rotate,no rotation,accelerated another 30 knots and staggered into the air.It was 2 minutes before wing & engines were performing properly! A hard lesson,he was lucky to get away with it.I hope that idiot chief pilot reads this!