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 of component failures and remarks for different engine litreages over six months.
| Identifier | ExFiles\Box 130\4\ scan0123 | |
| Date | 12th March 1937 guessed | |
| - 10 - 3½ LITRE. 4¼ LITRE. TOTAL. GRAND TOTAL. REMARKS. BIG END FAILURES. March Quarter. C.C. 8 - 8) C.P. 8 - 8) 16 Usually either No. 2 or No. 5 big end after long fast run. Extra lubrication from intermediate bearing is being introduced. Previous Quarter. C.C. 3 2 5) C.P. 7 1 8) 13 Six Months. 26 3 29 29 KNOCK IN TRANSMISSION. March Quarter. C.C. 16 32 48) C.P. 13 22 35) 83 Wear in wheel drivers or road wheel splines. Wheel drivers are now being strengthened. Previous Quarter. C.C. 27 27 54) C.P. 4 4 8) 62 Six Months. 60 85 145 145 WILMOT-BREEDEN BUMPER DEFECTS. March Quarter. C.C. 8 15 23) C.P. 11 7 18) 41 Mostly rattle due to bob weights collapsing. Antimonial lead weights are being tried. Previous Quarter. C.C. 5 1 6) C.P. 22 10 32) 38 Six Months. 46 33 79 79 DEFECTIVE SHOCK DAMPERS. (CONTROLLABLE). March Quarter. C.C. 17 14 31) C.P. 1 - 1) 32 16 knock. 2 governor. Remainder bleed, and cure oil leaks Previous Quarter. C.C. 26 9 35) C.P. 1 - 1) 36 Six Months. 45 23 68 68 | ||