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).
Summary report detailing engine faults, their frequencies by model and time period, and proposed technical solutions.
| Identifier | ExFiles\Box 47\3\ Scan255 | |
| Date | 30th September 1931 guessed | |
| -9- 20 HP. 25 HP. PH.I. PH.II. TOTAL. GRAND TOTAL. REMARKS. EXHAUST CUTOUT. September Quarter. C.C. - - - 17 17) 23 W.P. - - - 6 6) Previous " C.C. - - - 16 16) 18 W.P. - - - 2 2) Six months. - - - 41 41 41 This trouble on Ph.II is caused by the sliding joint not working, and is definitely cured by modifying the sliding joint as per Depot Sheet 199 and fitting an additional stay to the rear silencer as per Depot Sheet No. Hd.{Mr Hayward/Mr Huddy}218. ENGINE - OVER-OILING. September Quarter. C.C. - - 12 16 28) 77 W.P. 2 - 19 28 49) Previous " C.C. 3 - 8 14 25) 54 W.P. 1 2 5 21 29) Six months. 6 2 44 79 131 131 The majority of these are top over-oiling and definitely cured by restricting the oil flow at the valve end of the rockers. See Depot Sheets Hm.{Capt. W. Hallam - Head Repairs}147, 174, and 176. ENGINE PISTON KNOCKS. September Quarter. C.C. 1 1 4 7 13) 15 W.P. - - 2 - 2) Previous " C.C. - 2 1 3 6) 6 W.P. - - - - -) Six months. 1 3 7 10 21 21 ENGINE - PISTONS SEIZED. September Quarter. C.C. 1 - - - 1) 1 W.P. - - - - -) Previous " C.C. - - - 1 1) 2 W.P. - - 1 - 1) Six months. 1 - 1 1 3 3 | ||