Slight thread drift but fascinating to see:
New Airliner, 1946/02/21 (1946)
New Airliner, 1946/02/21 : Free Download & Streaming : Internet Archive
Douglas DC-6 luxury airliner tested in Long Beach, interior views for 56 passengers, converted into sleeping compartments for 26 passengers, at 20,000 ft.
This movie is part of the collection: Universal Newsreels
Production Company: Universal Studios Audio/Visual: sound, b&w
Creative Commons license: Public Domain