The torsional rigidity of a Bentley III frame with welded gussets.
| Identifier | ExFiles\Box 86\4\ scan0235 | |
| Date | 8th June 1937 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).