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).
Blueprint showing two views of a structural component, with a note to strengthen a section against torsion.
| Identifier | ExFiles\Box 14\4\ Scan036 | |
| Date | 10th March 1928 guessed | |
| THIS SECTION WILL HAVE TO BE STRENGTHENED IN TORSION B | ||