Found this interesting.
The REO Motor Car Company was started in the early 1900's by Ransom Eli Olds after leaving Olds Motor Works. In 1927 they introduced the REO Flying Cloud. Here is a link to an example-the 1934 model:
1934 Reo Flying Cloud For Sale~Only 20 Registered in USA~350 V8~Turbo 400 Trans~Hydrolic Brake - YouTube
Sorry-Don't know how to embed the video
I believe the first Airstream Flying Cloud model came out in 1950
. Wonder if the REO model was an inspiration for the Airstream name?