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).
Low oil pressure issue on the Phantom III and comparing oil pump types.
| Identifier | ExFiles\Box 149\2\ scan0118 | |
| Date | 3rd May 1936 | |
| To RHC.{R. H. Coverley - Production Engineer} X1265 Hs{Lord Ernest Hives - Chair}/Swdl.{Len H. Swindell}29/KW.3.5.36. Phantom III. One of the troubles experiencedd on Ph.III is the very low oil pressure when the oil is hot and the engine slow running at 200-300 r.p.m. Comparative tests have shown that a straight sided tooth oil pump is more efficient at low speeds than the helical gear pump. Will you please have made a straight sided tooth gear pump; otherwise to standard L.O.P. Hs{Lord Ernest Hives - Chair}/L.H.Swindall. | ||