Increase of the specific load under tension, compression, and buckling of welded steel tubes in airplane construction by suitable treatment of structural steel and by proper design

Muller, J.
naca-tm-912
1939

The new construction method indicated, which makes possible a considerably better material utilization and hence a saving in weight, has been tested in a number of Focke-Wulf types also in series production and has fully justified itself.

An Adobe Acrobat (PDF) file of the entire report:
http://naca.central.cranfield.ac.uk/reports/1939/naca-tm-912.pdf