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 durometer hardness required for radiator mounting blocks on B.III & B.50 models.
| Identifier | ExFiles\Box 99\4\ scan0070 | |
| Date | 1st November 1938 | |
| HHO also SHO γ To HPS.{Horace Percy Smith - Experimental Factory Mgr} from Rm{William Robotham - Chief Engineer}/Std. Rm{William Robotham - Chief Engineer}/Std.6/MH.{M. Huckerby}1.11.38. B.III & B.50 RADIATOR MOUNTING BLOCKS - FIRESTONE NO. 625. With regard to the Fireston standard rubber blocks No.625 used for supporting our B.III and B.50 radiators, we have found that in order to prevent radiator movement, it is necessary to use rubber of durometer 40/45. Will you therefore order and fit blocks of this durometer to all future B.III and B.50 cars and change 9.B.V. blocks at the first convenient opportunity. The blocks which you are using at present are of unspecified durometer hardness, but are considerably harder than we require. Rm{William Robotham - Chief Engineer}/Std. | ||