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).
Fitting of a B.60 No.4 engine and a thin flexible flywheel disc to a Bentley car for testing.
| Identifier | ExFiles\Box 111\3\ scan0076 | |
| Date | 5th April 1939 | |
| 800b To HPS.{Horace Percy Smith - Experimental Factory Mgr} c. c. to Rm{William Robotham - Chief Engineer}/Cwdl. Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager}17/JH.5.4.39. Bentley car 3.B.50. At the moment it is intended to fit B.60 No.4. Cast Iron Engine Unit to the above car, and we wish to have incorporated in this engine the flexible flywheel disc No.Rm.{William Robotham - Chief Engineer}584. This is the thinnest disc we have ever run, and it is essential that we run it on the next 15,000 miles test in France. If there should be a change of engine for this car for some reason or other, the flywheel mentioned must be fitted to the first engine unit so that it is run in France. Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} | ||