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).
Proposal to fit the radiator for the Silver Wraith 80, detailing area comparisons and modifications.
| Identifier | ExFiles\Box 109\1\ scan0032 | |
| Date | 19th August 1938 | |
| Secret. 666 To Da.{Bernard Day - Chassis Design}. from Ev.{Ivan Evernden - coachwork} c. By.{R.W. Bailey - Chief Engineer} Rm.{William Robotham - Chief Engineer} Pm Std. Radiator - Silver Wraith 80. On PD.233 ( 3 sheets ) herewith, we shew the radiator for Silver Wraith 80 with the exception of the lower shutter bearing strip, a scheme for which is in hand. It is proposed to fit this radiator in the position drawn on the first chassis, although it will have only a 6 cylinder engine at the outset. Suitable mockup water pipes and a long bossed fan will have to be provided. The area of the B.III. matrix which is 58 m/m.{Mr Moon / Mr Moore} thick is 399 sq.ins. (Rm{William Robotham - Chief Engineer}/Std. called for 383 sq.ins). The area of the Silver Wraith 80 matrix is 432 sq.ins. The use of 84 m/m.{Mr Moon / Mr Moore} matrix is equivalent to an 18% increase in area, i.e. equivalent area is 510 sq.ins. Therefore the area ratio increase over Std's figure for B.III. is 33% and the engine capacity has gone up by an equivalent amount. The shell and shutters are almost entirely Wraith III. pieces, and the internals are B.III. parts. The tank and yoke have been modified to make them applicable to this car and to keep the pieces in line they should be applied to B.III. and B.50. The chief items are the deepened top tank and the modified radiator yoke. Ev.{Ivan Evernden - coachwork} | ||