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).
Tabular report summarizing spring failures by model over a six-month period, with remarks on remedies.
| Identifier | ExFiles\Box 47\3\ Scan074 | |
| Date | 31th March 1931 guessed | |
| -14- 20 HP. 25 HP. PH.I. PH.II. TOTAL. GRAND TOTAL. REMARKS. SPRINGS NOT COMFO TABLE. March quarter. C.C. 3 13 11 16 43 } 43 W.P. 7 7 13 9 36 Previous " - - - - - 36 Six months. 10 20 24 25 79 79 20 HP. 20/25 HP. and PH.I. Definitely improved by fitting grooved springs and modifying shock dampers. Ph.II. Increased lubrication to the rear spring leaves is being tried. SPRINGS WEAK. March Quarter. C.C. 3 6 2 17 28 } 28 W.P. 3 10 3 35 51 Previous " - - - - - 51 Six months. 6 16 5 52 79 79 Mostly due to insufficient buffer clearance being allowed but stronger springs are now being fitted and complaints should die out except when body weights are excessive. SPRINGS - FRONT BROKEN. March Quarter. C.C. 3 - 2 - 5 } 6 W.P. 1 - - - 1 } Previous " 4 - 4 - 8 8 Six months. 8 - 6 - 14 14 SPRINGS SQUEAK. March quarter. C.C. 1 3 2 2 8 } 9 W.P. - 1 - - 1 } Previous " 6 11 10 8 35 35 Six months. 7 15 12 10 44 44 Grooved springs cure Ph.I complaints Improved lubrication on Ph.II cars. | ||