Load diagram for a Firth's front spring for 40/50 HP models, complete with clips.
| Identifier | ExFiles\Box 52\2\ Scan095 | |
| Date | 9th April 1924 guessed | |
| tuning LOAD DIAGRAM OF FIRTH'S WOODHEAD'S FRONT SPRING. (Note: 'WOODHEAD'S' is crossed out) 40/50 H.P. SPRINGS. SPRING COMPLETE WITH CLIPS. Y-AXIS: LOAD ON SPRING. CWTS. X-AXIS: DEFLECTION OF SPRING FROM FREE POSITION. Graph label: NORMAL POSITION. | ||
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).