Blueprint diagram illustrating a rigidity test for the lower triangle of a B III front suspension.
| Identifier | ExFiles\Box 100\1\ scan0147 | |
| Date | 9th May 1938 guessed | |
| RIGIDITY TEST FOR LOWER TRIANGLE OF B III FRONT SUSPENSION A E STRUT D C B 30 LB. FIG. IV | ||
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).