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Hallo,USA Russell theBR-1 and BR-2 were a single seat ultra-light autogyros, designed inearly 1960s,the BR-3-D was built as a flying test-bed for components of theBR-4 agricultural version.SWISS Stierlin type 1,2 and 3 :were a single seat ultra-light helicopters of 1960s.
Hallo,
USA Russell theBR-1 and BR-2 were a single seat ultra-light autogyros, designed in
early 1960s,the BR-3-D was built as a flying test-bed for components of the
BR-4 agricultural version.
SWISS Stierlin type 1,2 and 3 :were a single seat ultra-light helicopters of 1960s.
