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 on various engine faults, broken down by model type and time period.
| Identifier | ExFiles\Box 47\2\ Scan351 | |
| Date | 1st September 1930 guessed | |
| -7- 20 HP. 25 HP. Ph.I. Ph.II TOTAL REMARKS. ENGINE - OVEROILING. September quarter 1 - 4 8 13 Depot Sheets Hd.{Mr Hayward/Mr Huddy}174/6 Previous 9 - 9 18 36 Six months 10 - 13 26 49 ENGINE - PISTON KNOCKS. September quarter. 1 - 4 2 7 Previous - - 4 2 6 Six months. 1 - 8 4 13 ENGINE - PISTONS SEIZED. September quarter. - - 2 - 2 Previous - - 2 - 2 Six months - - 4 - 4 ENGINE - SLIPPER DRIVE. September quarter. 7 2 6 - 15 Hs{Lord Ernest Hives - Chair} investigating. Previous 20 7 16 6 49 Six months. 27 9 22 6 64 ENGINE - DYNAMO DRIVE RATTLES. September quarter 6 - - - 6 Included in above job Previous 2 - - - 2 Six months. 8 - - - 8 | ||