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).
Fitting a high compression cylinder head to a Paris demonstration car.
| Identifier | ExFiles\Box 27a\1\ Scan202 | |
| Date | 1st January 1935 | |
| 46013 To Sg.{Arthur F. Sidgreaves - MD} From Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. to Wor.{Arthur Wormald - General Works Manager} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}10/KW.1.1.35. High Compression Cylinder Head - Paris Trials Car. We have now heard from Sr. with regard to the high compression head fitted to Poberejsky's car, and he has asked that this head shall be fitted to GSF-5, the new Paris demonstration car. Hancock was not very enthusiastic about the results obtained. We consider, however, that in view of Sr's request it is worth fitting this high compression head to the Trials car and getting accurate figures as to its performance compared with other standard chassis before letting it leave the Works. We know of no other way of helping Sr. with performance. As previously pointed out, the other parts which are necessary with this high compression head are - (1) Bentley ignition advance characteristics. (2) Special sparking plugs. We attach curves showing the improvement in power output measured with the high compression cylinder head. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||