I chug about in a Cub and really appreciated JF's and other's explanations of groundloops. I knew about the CofG behind the main wheels but had completely forgotten the drag acting at 180 from the direction of travel.
The first time it happens is always extremely interesting isn't it! Oh, look at that staionary piston Provost rushing at me!
Regarding JF's comments on the various projects that were axed in the 60's; did the opposition have any aircraft that culd have caught up with the TSR2 and require it to deviate from a straight line? Surely it would have been better that the FB-111 that was supposed to have filled the requirement?