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).
Investigation confirming a hot rear seat on the 4.B.50 model due to the exhaust system, requiring a heat shield.
| Identifier | ExFiles\Box 111\4\ scan0198 | |
| Date | 15th April 1940 | |
| C O P Y. Sg.{Arthur F. Sidgreaves - MD} from Rm.{William Robotham - Chief Engineer} C. to Ev.{Ivan Evernden - coachwork} Rm.{William Robotham - Chief Engineer}18/ML.15.4.40. HOT REAR SEAT - 4.B.50 Our investigation confirms that the rear seat of the 4.B.50 does get very hot due to the proximity of the exhaust system. It will be necessary to fit a shield over the exhaust system similar to the one which we had on production on Phantom II and III. Rm.{William Robotham - Chief Engineer} | ||