RP Wasserkuppe, probably early 1970s (Source: private collection, Walter Elkins) Radar site is clearly visible looming over the very popular Segelfliegerschule and Hotel in this German post card from the early 1970s. The 'Kuppe has been a favorite among German gliders (moterless flight) from even before WW I. Check out the 601st AC&WS web site for some great details on Wasserkuppe history.