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Originally Posted by RSColonel_131st
I really have no clue how this "kite-gyro" actually flew. How can a little horizontal airflow (10 knots...) over three rotor blades make them spin and lift 120kg?
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Hi!
It is a "rotary-winged glider" and was towed behind the U-boat. The U-boat provided forward speed, and the wings provided lift through autorotation. You can read more about autorotation
here.
Pablo
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"...far better it is to dare mighty things, to win glorious triumphs even though checkered by failure, than to rank with those poor spirits who neither enjoy much nor suffer much, because they live in the gray twilight that knows neither victory nor defeat."
- Theodore Roosevelt,
speech before the Hamilton Club, Chicago, April 10, 1899