It is quite late and after a hard day doing science dropping large cannon balls and feathers off large towers to prove that gravity is far more painful if it hits an unsuspecting passer by when it is influencing a cannon ball in a state of freefall, rather than a whole load of feathers. Unless they are glued to a cannon ball or a cat. I have decided that I will re post an old post from the past and also an old drawing. I know I am lazy but I do post stuff more than most so feel as it will soon be Christmas I am entirely justified.
So here it is . . . . an OLD POST