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).
Positive test results of a 20/25 HP engine with an integral crankcase and cylinder block, recommending its adoption.
| Identifier | ExFiles\Box 103\2\ scan0238 | |
| Date | 21th April 1931 | |
| To R.{Sir Henry Royce} from Sg.{Arthur F. Sidgreaves - MD} Copy to Wor.{Arthur Wormald - General Works Manager} E.{Mr Elliott - Chief Engineer} HS{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Da.{Bernard Day - Chassis Design} By.{R.W. Bailey - Chief Engineer} re 20/25 HP. Integral crankcase and cylinder block. Referring to Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}1/AD20.4.31, I thought you would be interested to know that I used the car fitted with the integral crankcase and cylinder block for a distance of some 300 miles at Easter. I thought that it was the sweetest running 20/25 that I have ever driven. In order to refresh my memory of what a standard 20/25 is like, I used one of these last week-end and my impressions of the one with the integral crankcase and cylinder block were confirmed thereby. In view of the results achieved and the economy in manufacture it certainly looks as if we ought to adopt this form of construction for Japan III. Sg.{Arthur F. Sidgreaves - MD} | ||