A lovely sunny day, and plenty of people - some of them aspiring Bronze pilots - turned out to hear Symeon explaining Theory of Flight. Most of us thought it was elves that kept us up there, but Symeon managed to make sense of the coefficient of lift, aspect ratios and why you need to know the square root of 2, without which a glider just wouldn't fly.
No photo, forgot camera.
Next week William Parker will be dealing with Human Factors.
An addition to the programme is Jim White on Met for Cross Country, on 1 FEBRUARY, when he will de-mystify the tephigram.