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).
Blueprint detailing the specifications and dimensions of a rear spring.
| Identifier | ExFiles\Box 154a\2\ scan0369 | |
| Date | 4th March 1937 guessed | |
| RM{William Robotham - Chief Engineer} 735 .125" THRO' SPRING EYES TO TOP OF MAIN LEAF 827 LB. FOUR PASS. LOAD 22" EYE DIA. .875 +/- .005" MEAN RATE FOR 2" EITHER SIDE OF THE NORMAL LOAD POSITION = 132 LB/INCH NO DEAD PORTION AT CENTRE OF SPRING WIDTH OF SPRING 1 3/4" REAR SPRING | ||