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 table of reported failures for 25 HP and Phantom II models, categorized by issue, with counts for the December quarter and a three-month total.
| Identifier | ExFiles\Box 130\1\ scan0193 | |
| Date | 8th February 1935 guessed | |
| - 11 - VALVES STICKING. 25 HP. PH.II. TOTAL. GRAND TOTAL. REMARKS. December Quarter. C.C. 1 7 8) C.P. - 5 5) 13 Parallel guides and increased diameter valve stems and longer undercut are now being used on Production and for complaints. Three Months. 1 12 13 13 FAN BRK'T FAILURES. December Quarter. C.C. 3 - 3) C.P. - - -) 3 This is now having the attention of the Design Department. Three Months. 3 - 3 3 EXHAUST BEAT IN ENGINE. December Quarter. C.C. - 4 4) C.P. - 17 17) 21 This job still requires further investigation. Three Months. - 21 21 21 PETROL STARVATION. December Quarter. C.C. - 14 14) C.P. - 5 5) 19 Standard modifications to carburetter improve this. Three Months. - 19 19 19 BONNET RATTLES. December Quarter. C.C. 17 2) 19) C.P. 7 8 15) 34 Three Months. 24 10 34 34 CENTRAL LUBRICATION FAILURES. December Quarter. C.C. 19 10 29) C.P. 5 4 9) 38 Three Months. 24 14 38 38 | ||