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).
Deletion of two holes in the 25-HP bottom half crankcase following a 10,000-mile test.
| Identifier | ExFiles\Box 103\2\ scan0270 | |
| Date | 7th September 1934 | |
| x5000 To BY.{R.W. Bailey - Chief Engineer} from E/JNR.{Charles L. Jenner} c. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} GWH{George W. Hancock - Head Chateauroux} re 25-HP. Bottom Half Crankcase. As the result of our last 10,000 mile test the two holes 1.5 diameter which are in the forward web of the oil sump can be deleted. This prevents the oil sweeping away from the oil filter. The hole underneath the suction pipe is sufficiently large enough to permit the oil to run back. E/JNR.{Charles L. Jenner} | ||