waterballast

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• Glasflügel H-301 — NOTOC The Glasflügel H 301 Libelle is an early composite 15 metre Class single seat sailplane produced by Glasflügel from 1964 to 1969.DevelopmentIn 1964 the H 301 Libelle ( Dragonfly ) received the first German and first U.S. Type Certificate… …   Wikipedia