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).
Instruction on the required tolerances for quoting the poundage of road springs.
| Identifier | ExFiles\Box 154a\4\ scan0029 | |
| Date | 1st January 1937 | |
| BY/RWC c. Rm.{William Robotham - Chief Engineer} 1306 BY.4/G.1.1.37. ROAD SPRINGS. In future please arrange to quote the exact poundage the particular chassis requires, and do not quote any other figure. Instruct the Works they can select for rear springs on 25/30 and Phantom lll springs shewing actual poundage of within ± 50 of the figure you quote. For front springs on 25/30 and front and rear on Bentley, quote exact poundage ± 30 lbs. By BY.{R.W. Bailey - Chief Engineer} | ||