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).
Quarterly report on engine faults and their remedies for various car models.
| Identifier | ExFiles\Box 130\1\ scan0087 | |
| Date | 30th September 1933 guessed | |
| - 7 - 20 HP. 25 HP. PH.I. PH.II. TOTAL. GRAND TOTAL. REMARKS. ENGINE - SPRING AND SLIPPER DRIVE. September Quarter. C.C. 1 11 - 4 16) 18 Early 20 HP. and PH.I. - These W.P. - 2 - 2 2) can be cured by fitting cotton Previous Quarter. C.C. 2 6 2 11 21) 27 duck washers in place of bakelite. W.P. - 2 - 4 6) PH.II. - Latest type low inertia Six Months. 3 19 2 21 45 45 drive with "window" type pressure plate cure this trouble. See Depot Sheets Ed.{J. L. Edwards}190 and Ed.{J. L. Edwards}227. ENGINE - RATTLE FROM TIMING GEARS. 20/25 HP. Synchromesh cars. - September Quarter. C.C. 2 71 - 10 83) 86 Design and Experimental Departments W.P. 3 - - - 3) are now producing a cam balancing Previous Quarter. G.C. - 42 - - 42) 44 device to overcome gear rattles. W.P. - 2 - - 2) Six Months. 2 118 - 10 130 130 ENGINE - VALVE SPRINGS BROKEN OR WEAK. September Quarter. C.C. - 4 - 3 4) 7 New type valve springs with semi- W.P. - - - - 3) open ends and circular grinding Previous Quarter. C.C. - 18 2 3 23) 32 are now being used and are a W.P. - - - 9 9) definite improvement. The 20/25 HP. Six Months. - 22 2 15 39 39 failures are believed to be due to a batch of faulty material. WATER LEAKS FROM CYLINDER. September Quarter. C.C. - 1 - 2 3) 40 PH.I. and PH.II definitely cured W.P. - 3 - 34 37) by fitting nickel plated copper Previous Quarter. C.C. - - 3 4) 86 tubes in place of original W.P. - 1 11 71 82) aluminium tubes. Also bronze core Six Months. - 1 15 110 126 126 hole plugs instead of aluminium. All cars being attended to. Depot Sheet Ed.{J. L. Edwards}221. | ||