We have a small informal "contest" going on this weekend at Sky
Soaring outside of Chicago (http://skysoaring.com) and are laying out
the grid for about 20 gliders. The even gliders are in one line and
odd gliders in the other. We are about to start painting numbers on
the turf and said to ourselves, what should the spacing be?

What is the suggested minimum spacing from the nose of glider 1 to the
nose of glider 3?

Thanks, John