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).
Secret memo detailing three drawings for the Wraith Engine concerning the crankcase, oil system, and cylinder head modifications.
| Identifier | ExFiles\Box 6\6\ 06-page027 | |
| Date | 15th January 1935 | |
| To BY.{R.W. Bailey - Chief Engineer} from E/JNR.{Charles L. Jenner} c. For. RHC.{R. H. Coverley - Production Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} SECRET. re Wraith Engine. We send you herewith the following drawings:- LeC.4289 which deals with the design of the lower half of the crankcase, oil filter and suction pipe. We are calling for the first sump to be made in magnesium. LeC.4306 showing the oil filler, oil gauge, and crankcase drain tap. LeC.4308 is a modification to the cylinder and head. We have introduced a drilled passage across the block and through the head so as to avoid as far as possible external oil pipes. This oil is the supply to the rockers. E/JNR.{Charles L. Jenner} | ||