The Boeing-Vertol Model 107 helicopter reday for a test flight in 1958. The Fuselage, and rear landing gear fairings have been covered with tufts of string to show air flow and direction for testing purposes. (Boeing-Vertol)
The Boeing-Vertol Model 107 helicopter reday for a test flight in 1958. The Fuselage, and rear landing gear fairings have been covered with tufts of string to show air flow and direction for testing purposes. (Boeing-Vertol)