MOTORLESS ENDURANCE: Tandem-seated in the well-protected if not too roomy cockpits of this sailplane, two Austrian pilots, Toni Kahlbacher (left) and Josef Fuhringer, remained aloft for 40hr. 51min. on September 8-10 after an aero-tow to 1,500ft., thereby setting up a new world record for two-seater gliders. According to Flugsport, they subsisted on an uninspiring diet of biscuits and water