Born: 21.05.1946 Nationality: Dutch Flying experience: gliders only; more than 1100 starts or 215 hours since 1991 on the following types: two-seaters: Schleicher ASK-13, Schleicher ASK-21, Grob Twin Astir Single seaters: Schleicher K-8c, PZL-Bielsko SZD-51-1 Junior, Rolladen-Schneider LS-4b, Pilatus B4-PC-11, Schleicher ASK-23 Interest: aircraft built as prototype or in small numbers only Photos: more than 10,000 world-wide covering the period 1930 up to now Archive: technical info and 3-view drawings on most types; more than 850 books on aviation.