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).
Recommending the adoption of a trap door design for the Wraith III and Bentley III models.
| Identifier | ExFiles\Box 97\1\ scan0165 | |
| Date | 16th March 1938 | |
| -2- Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}1/R.16.3.38. In view of the results obtained and the simplicity of the trap door, etc. which needs no testing as is incorporated on P.III, we consider that it should be adopted on Wraith III and Bentley III. Attached is a sketch of the balance hole and trapdoor as tried out on Wraith. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} | ||