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 springing complaints categorized by type, car model, and time period, with remarks on potential cures.
| Identifier | ExFiles\Box 47\3\ Scan486 | |
| Date | 1st June 1932 guessed | |
| -13- 20 HP. 25 HP. PH.I. PH.II. TOTAL. GRAND TOTAL. REMARKS. TOTAL SPRINGING COMPLAINTS. June Quarter. C.C. 5 45 8 48 106 } 108 W.P. - - - 2 2 } Previous " C.C. 4 23 6 22 55 } 55 W.P. - - - - - } Six months. 9 68 14 72 163 163 SPRINGS NOT COMFORTABLE. June Quarter. C.C. 4 40 7 45 96 } 96 W.P. - - - - - } Previous " C.C. 2 17 5 18 42 } 42 W.P. - - - - - } Six months. 6 57 12 63 138 138 SPRINGS WEAK. June Quarter. C.C. - 4 - 3 7 } 7 W.P. - - - - - } Previous " C.C. - 1 - 4 5 } 5 W.P. - - - - - } Six months. - 5 - 7 12 12 SPRINGS SQUEAK. June Quarter. C.C. 1 1 1 - 3 } 5 W.P. - - - 2 2 } Previous " C.C. 2 5 1 - 8 } 8 W.P. - - - - - } Six months. 3 6 2 2 13 13 REMARKS: Ph.I. Complaints can be definitely cured by grooving springs and modifying shock dampers. 20/25 HP. We can cure many complaints by modifying the shock dampers, grooved springs are an advantage. In exceptional cases low rating springs are necessary Ph.II. Increased lubrication and higher shock damper loads effect a cure. Mostly due to insufficient clearance being allowed but stronger springs are now being fitted and complaints should die out except when body weights are excessive. Grooved springs cure Ph.I and 20/25 HP. complaints. Improved lubrication on Ph.II cars. | ||