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 detailing failures and issues for dynamos and exhaust butterfly valves across various car models.
| Identifier | ExFiles\Box 47\2\ Scan349 | |
| Date | 1st September 1930 guessed | |
| -5- 20 HP. 25 HP. Ph.I. Ph.II TOTAL REMARKS. DYNAMO FAILURES. September quarter - 5 3 2 10 1 at W. due to sticking brushes. Previous " 8 1 9 8 26 Six months 8 6 12 10 36 DYNAMO NOISY. September quarter 2 2 3 1 8 Previous " - - - - - Six months 2 2 3 1 8 DYNAMO LOW OUTPUT. September quarter. - - 1 1 2 Previous " - - 1 1 2 Six months. - - 2 2 4 EXHAUST BUTTERFLY VALVE. September quarter - - 11 - 11 N. had supplies Nitra alloy spindles & P.B. bushes last April - now awaiting report. By instructing a supply of Cast Iron bushes in place of P. B. to be tested. Previous " - - 24 - 24 Six months - - 35 - 35 | ||