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).
List of dynamo failures with their probable causes and complaints for early type models.
| Identifier | ExFiles\Box 70\3\ scan0329 | |
| Date | 1st August 1912 | |
| RR 238 (150 BKS.) (DB{Donald Bastow - Suspensions} 461-8-12 24) MP 306975 ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. PD.13. (2) Customer's No. Early Type. | Dynamo | Complaint | Reported Probable Cause of Failure | | :--- | :--- | :--- | | TP.SS.{S. Smith} UN45X EB.35. AR.85 TA.85 DE.85X RD.65 | Solder melted. | Overheating due to excessive output as the result of control brush position. | | OR.75 NO.75 | Solder melted. | Excessive output due to fault on cutout. | | OR.25 | From J.D. Solder melted. | Found excited in wrong direction. Fault due to wrong treatment in J.D. | | OR.75 | Solder melted. Blowing fuses. | Failure of cutout points to make contact. | | VE.75 | Solder melted. | Bad contact of negative brushes due to being reversed in holders. | | UJ.45X | Solder melted. | Positive terminal accidentally earthed on carcase by some external means. | | UR.65 | Solder melted. Noisy. | Excessive output due to control brush position. Brushes noisy through spark wear. | Signed Cont'd.{John DeLooze - Company Secretary} This Sheet must be filed on completion of the work. | ||