Lockheed CL-475
…the Lockheed XH-51 and AH-56 Cheyenne. In 1975, Lockheed donated the CL-475 to the National Air and Space Museum. The helicopter was loaned to the United States Army Aviation Museum at Fort Rucker, Alabama, but was in the museum's storage as of 2009. Following a restoration, it was placed on display in 2018. Data from…