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From, ROTARY WING AIRCRAFT HANDBOOKS AND HISTORY VOLUME 13,a Japanese designed called Kannoryo Kotani worked on a convertiplane airplane Project,with a folded rotary wings at a highspeed.
From, ROTARY WING AIRCRAFT HANDBOOKS AND HISTORY VOLUME 13,
a Japanese designed called Kannoryo Kotani worked on a convertiplane airplane Project,with a folded rotary wings at a high
speed.
