Frame was 3" - Now 4" Deep - Or is it???

Prior to 1955 Vintage Airstream Frames were 3" deep.

The change to a stronger 4" frame was started in 1955.

Unfortunately, our Flying Cloud was manufactured in California with the 3" frame.  Our gray water and fresh water tanks from Vintage Trailer Supply are 4" deep.  As planned - to fit the tanks into the frame, Colin Hyde changed our frame to be 4" deep.

The longer frame will allow us to add a bumper trunk also.

With the small angle cut from the frame, the 3" bumper remains the original depth!

Welded closed, this also prevents water from sitting inside the frame causing rust.

And eliminates a way for mice and other critters to enter the trailer.

In 1955 and many other years, Airstream built trailers with  no rear cross member.  So the plywood floor was not directly supported by the frame, rather the floor was cantilevered from the next forward cross member.  And the plywood was originally attached through the C-Channel only to the aluminum shell.  

No wonder that attaching accessories to the back of an Airstream is a bad idea.  Spare tires, generators, even bike racks should not be attached to the trailer rear without significant frame work.

Colin beefed up our structure by adding a rear cross-member.  The aluminum shell, plywood floor, C-Channel, and shell will all be securely attached together with elevator bolts.

 

 

 

Rotisserie!

The front hold-down plate was removed, but will be replaced.  The hold down plate strengthens the connection of the frame to shell at the higher stress front area.