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).
Statistical report outlining various engine faults, their frequencies across different models, and recommended remedies.
| Identifier | ExFiles\Box 47\3\ Scan482 | |
| Date | 1st June 1932 guessed | |
| -9- 20 HP. 25 HP. PH.I. PH.II. TOTAL. GRAND TOTAL. REMARKS. ENGINE - SLIPPER & SPRING DRIVES. June Quarter. C.C. 6 2 - 5 13 } 14 W.P. - - - 1 1 Previous " C.C. 6 5 7 2 20 } 28 W.P. 4 - 2 2 8 Six months. 16 7 9 10 42 42 Early 20 HP. & PH.I - These can be cured by fitting cotton duck washers in place of Bakelite. 20/25 HP. - We do not have much trouble on these cars. Ph.II - Latest type low inertia drive with "Window" type pressure plates cures this trouble. See Depot Sheets Hd.{Mr Hayward/Mr Huddy}190 & Hd.{Mr Hayward/Mr Huddy}227. ENGINE - OIL PUMP NOISY. June Quarter. C.C. - - - 2 2 } 4 W.P. - 2 - - 2 Previous " C.C. 1 1 1 2 5 } 5 W.P. - - - - - Six months. 1 3 1 4 9 9 Depot Sheet Hd.{Mr Hayward/Mr Huddy}206 deals with the fitting of an oil reservoir to the oil pump on Ph.II cars and is a definite improvement. ENGINE - VALVE SPRINGS BROKEN OR WEAK. June Quarter. C.C. - 1 - 15 16 } 17 W.P. - - - 1 1 Previous " C.C. - - 1 3 4 } 14 W.P. - - 2 8 10 Six months. - 2 3 26 31 31 New type valve springs with semi-open ends and circular grinding are being used and are a definite improvement. ENGINE - VALVES STICKING. June Quarter. C.C. - - 1 4 5 } 5 W.P. - - - - - Previous " C.C. - - 3 2 5 } 5 W.P. - - - - - Six months. - - 4 6 10 10 This can be cured by providing adequate clearance at the mouth of the valve guide to allow for the formation of carbon. | ||