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).
Engine faults such as irregular running and popping in the silencer across various models.
| Identifier | ExFiles\Box 130\1\ scan0092 | |
| Date | 1st November 1933 guessed | |
| - 12 - 20 HP. 25 HP. PH.I. PH.I TOTAL. GRAND TOTAL. REMARKS. IRREGULAR RUNNING OF ENGINE. September Quarter. C.C. - 24 - 6 30) 30 Mostly due to sticking of air valves. V.P. - - - - Three Months. - 24 - 6 30 30 POPPING IN SILENCER. September Quarter. C.C. - 16 - 8 24) 36 This is having the attention of the Design Department. V.P. - 11 - 1 12) Three Months. - 27 - 9 36 36 | ||