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).
Page 5 of a report detailing front suspension modifications, coil spring particulars, and test observations.
| Identifier | ExFiles\Box 108\1\ scan0168 | |
| Date | 6th September 1937 | |
| - 5 - HPS.{Horace Percy Smith - Experimental Factory Mgr}1/VS.{J. Vickers}6.9.37. Front Suspension (Continued). Shock Damper modifications in accordance with N.S.4990. Modified Front Sheetmetal Crossmember to N.S.5105. Modified and Lightened Main Forging to accord with N.S.5106. Additional crossmember behind Radiator to N.S.5113. Particulars of Coil Springs. Off Side. Near Side. Inner Spring 955 lbs @ 5.805". Inner Spring 955 lbs @ 5.805". " " 1375 lbs @ 4.810". " " 1385 lbs @ 4.810". Outer Spring 1985 lbs @ 6.055". Outer Spring 1970 lbs @ 6.055". " " 2950 lbs @ 5.060". " " 2966 lbs @ 5.060". Springs produced by the English Steel Corporation in S/CV. material. The springs were checked for poundage and freedom from collapse after test and found to be correct. Initial load of dampers - 45 lbs. with valves raised .005 off seats. ? The general condition is satisfactory, with the exception of the off-side rebound buffer, which is breaking away from the plate. The Upper and Lower Triangle Levers have been crack tested and found satisfactory. A slight foul has occurred between the coiled Oil Pipe and Fulcrum Pin Bore. It was observed that the breathers had been sweated up in France; these would therefore appear unnecessary. ? The off-side Surface Plate on the Front Pan for the Main Lever Housing is distorted .020, as illustrated by Ex.I.203 attached. continued. | ||