Got to get me one of these- clearly a chick magnet.
I think they just dig into the sand a bit- these things seem to always be on the beach(French seem to call them “Aeroplage” which I think loosly translates to aero-beach?). I actually was going to build something very similar to this a number of years ago for the Old Rhinebeck Aerodrome. Louis Bleriot(fisrt across the english channel in 1909) was an enthusiast and his company sold somethign similar for awhile.
Thought it might be sort of fun to sail up and down the runway on days when it blew to hard to fly the old planes. Unfortunately I haven’t gotten to it yet. Stay tune…