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 dynamo complaints categorized by issue type, car model, and time period, with remarks on solutions.
| Identifier | ExFiles\Box 130\1\ scan0126 | |
| Date | 31th March 1934 guessed | |
| - 5 - TOTAL DYNAMO COMPLAINTS. 20 HP. 25 HP. PH.I. PH.II. TOTAL. GRAND TOTAL. REMARKS. March Quarter. C.C. - 11 - 5 16) W.P. - - - 1 1) 17 Three rate charge scheme is now standard on 20/25 HP. cars, and should reduce dynamo complaints. Exceptional cases always arise where dynamo output is unsuitable. Voltage control on 40/50 HP. should be great help. Previous Quarter. C.C. - 21 1 2 24) W.P. - 4 - - 4) 28 Six Months. - 36 1 8 45 45 DYNAMO NOISY. March Quarter. C.C. - 6 - 5 11) W.P. - - - 1 1) 12 These are mainly noisy ball races. Roller bearing now being fitted at one end of armature to replace ball bearing, and a reduction in these complaints is anticipated. Previous Quarter. C.C. - 12 1 1 14) W.P. - 4 - - 4) 18 Six Months. - 22 1 7 30 30 DYNAMO LOW OUTPUT. March Quarter. C.C. - 5 - - 5) W.P. - - - - - 5 Dynamos giving better performance at speed are now available for early cars. Lower field resistance also available for later cars with half charge scheme. See Depot Sheet Hd.{Mr Hayward/Mr Huddy}241. Previous Quarter. C.C. - 9 - 1 10) W.P. - - - - - 10 Six Months. - 14 - 1 15 15 | ||