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).
Sketch illustrating the modification of funnels, comparing a new design with an old design.
| Identifier | ExFiles\Box 99\2\ scan0149 | |
| Date | 4th March 1938 guessed | |
| New design .128" thick Old design .104" thick Sketch illustrating modification of funnels. | ||