From People's magazine:
"Another new sport is boardsailing on the West German-made "Windglider." (Sailing aboard the lighter, shorter American-made "Windsurfer" will be an exhibition sport only.) Men and women compete against one another in this event, which requires the athlete to grasp the wishbone-shaped boom and maneuver the Windglider around a three-buoy, triangular course. Although the sport was invented in 1967 by two California engineers, one an avid sailor, the other a fanatic surfer, look to the Western Europeans for medals."
Perhaps that's my problem with fatigue: me grasps the wishbone-shaped boom too hard when sailing ! 
^^ LOL
The Windsurfer planes quite well, but I could never get the Windglider to... glide. Before the 84 Olympic sail they had crappy baggy sails that didn't work well.
That board sailed like a log !
