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).
Diagrams of an oil level cock and a large drain plug with a sump for collecting dirt.
| Identifier | ExFiles\Box 75\2\ scan0025 | |
| Date | 3rd August 1914 | |
| OIL LEVEL COCK WITH COVER AS AT PRESENT OPERATED FROM R H SIDE OF CAR AND MOUNTED ON SIDE OF CRANKCASE. LARGE DRAIN PLUG ON RH{R. Hollingworth} SIDE OF FILTER COVER WITH SUMP FOR COLLECTING DIRT. SYRINGING THROUGH PLUG HOLE WILL LOOSEN ANY ACCUMULATED DIRT IN SUMP. TO ACCOMPANY LETTER Oy 3. 8.14.23 Cy. Aug 14 | ||