The performance of a B.50 model fitted with a cast iron engine and twin exhaust system.
| Identifier | ExFiles\Box 111\3\ scan0106 | |
| Date | 16th June 1939 | |
| 800b & 1320 (Wyn's report only, in boo) By. {R.W. Bailey - Chief Engineer} from Rm. {William Robotham - Chief Engineer} c. Hs. {Lord Ernest Hives - Chair} c. Da. {Bernard Day - Chassis Design} c. Da {Bernard Day - Chassis Design} /Ev. {Ivan Evernden - coachwork} Rm {William Robotham - Chief Engineer} 5/R.16.6.39. B.50 Fitted with C.I. Engine. Attached is a copy of a report giving the results obtained on a B.50 fitted with the cast iron engine and twin exhaust system. For a Sports car, the twin exhaust system seems definitely to be justified as it gives an increase of no less than 5 m.p.h. It is apparent that the cast iron engine is going to enables us to improve the performance of the standard B.V. car, since this B.50 fitted with a body weighing over 38 cwts. and having a frontal area considerably in excess of the B.V. achieved a lap speed of 89 1/2 m.p.h. The lap speed of the present standard B.V. is 89 m.p.h., the P.III non-overdrive 86 m.p.h. The Wraith, which is directly comparable in body space and weight with B.50 laps about 74 m.p.h. in its present standard production condition. Rm. {William Robotham - Chief Engineer} | ||
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).