11.05.2019, Videos, USA
Vortrag - Karl Striedieck - Advanced Ridge Soaring Techniques
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Part of the Aero Club Albatross (ACA) "Soaring with the Champions" seminar held at Blairstown on Feb. 2, 2019 (See: https://drive.google.com/file/d/1kJS0YhQPhLnkfhxweruQaj3q7JLWgXb6/view
and https://en.wikipedia.org/wiki/Karl_Striedieck ) ...
Quelle: Christian (DD)