The stiffness of a Bentley III frame with welded gussets at different thicknesses.
| Identifier | ExFiles\Box 99\2\ scan0076 | |
| Date | 26th August 1938 guessed | |
| Bentley III frame. welded gussets .128" thick. 1700 lbs. ft. / degree .104" thick. 1350 lbs. ft. / degree | ||
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).