The Bendix Model K prototype initially flew with an uncovered fuselage and later with a fully enclosed, egg-shaped fuselage. By January 1947 it was in this form, with an open cockpit. Oddly the Model K and the larger Model J were apparently both named Whirlaway. Bendix Helicopter closed its doors in 1949. NX41817 then went to NACA for rotor research work according to a NASA document. An end date for this is not known to us. Photo from: NASA Langley
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