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1949-built twin-seat experimental helicopter design with twin intermeshing rotor blades. This was the fifth of seven completed and was retained by Kaman for development work. The US Navy and Coast Guard tested a few in the early 1950s.
This photo is copyright © R.A.Scholefield, and may not be used or published in any way without permission.
It was added on 3 July 2018, and has since been viewed 263 times.