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 vehicle complaints, car counts, and resolution remarks.
| Identifier | ExFiles\Box 47\5\ Scan150 | |
| Date | 30th March 1927 guessed | |
| -2- Nature of Complaint. | No.of Cars prior to India. Series | India Series. | Remarks. Rear Axle thrust bearing. | W. 10. N. - P. - total 25. | W.16. Last qtr's N. - P. - total 19. | The old design is improved and the modification is applicable to older cars. Broken Front Springs. | W. 15. N. 3. P. - total 20. | W. 1. Last qtr's N. - P. - total 17. | When the front springs break we invariably fit stronger springs. Early specification for 20 HP. springs was too light. Burning Platinum points. (Handwritten: Troubling contacts. Tungsten points old double volute contact-avoidance) | W. 3. N. 2. P. - total 21. | W.11. Last qtr's N. 4. P. 1. total 17. | We are ventilating the distributor cover in cases of complaint. Dynamo Failures. (Handwritten: E.F.C) | W. 4. N. 3. P. - total 13. | W. 4. Last qtr's N. 2. P. - total 18. | An improved dynamo has been standardised. Noisy Tappets. (Handwritten: Trouble should not occur before a large mileage has been completed.) | W. - N. - P. - total 17. | W.16. Last qtr's N. 1. P. - total 20. | The greatest number of complaints are caused by wear on the pins or the rollers. The smallest amount of wear here makes it impossible to get quiet tappets. The trouble is generally overcome by supplying new pins and rollers. | ||