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).
The bottom flange of a 0.5 gusset after 32 hours.
| Identifier | ExFiles\Box 99\2\ scan0170 | |
| Date | 4th March 1938 guessed | |
| Bottom flange of 0.5 gusset after 32 hrs. | ||