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 design progress and timeline for the new 4.B.50 radiator.
| Identifier | ExFiles\Box 111\4\ scan0144 | |
| Date | 20th April 1939 | |
| 800a. HPS{Horace Percy Smith - Experimental Factory Mgr}/WSC.{W. S. Cassel} from Rm.{William Robotham - Chief Engineer} Rm{William Robotham - Chief Engineer}7/R.20.4.39. 4.B.50 - Radiator. With reference to HPS{Horace Percy Smith - Experimental Factory Mgr}/WSC.{W. S. Cassel}18/BA.19.4.39., 4.B.50 has an entirely new frontal appearance which is shown on P.D.380. The design of this is being proceeded with, but it will be another fortnight before it is completed, and after this it will have to be detailed. As much energy as possible will be concentrated on the job, but it will have to take second place to the Ripple. We believe that if we can get the chassis down to the coachbuilders so that they can mount up the body, we shall be able to let you have the detail drawings in time for you to catch up the radiator. Rm.{William Robotham - Chief Engineer} | ||