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).
Test report for a 10,000-mile trial on Woodhead's 20% stiffer front road springs for an open touring car.
| Identifier | ExFiles\Box 42\3\ Scan163 | |
| Date | 19th November 1924 guessed | |
| 10,000 MILES TEST ON WOODHEADS 20% STIFFER FRONT ROAD SPRINGS. 9,364 Miles previously completed on 9.PK. Open Touring Car 98.MX{John H Maddocks - Chief Proving Officer} Date. | Days Miles. | Total Miles. | Day's Average Speed. | Total Average Speed. | Day's Petrol Cons'm.{Mr Moon / Mr Moore} | Total Petrol Cons'm.{Mr Moon / Mr Moore} | Day's Oil m.p.g. | Total Oil m.p.g. Oct 29. | 299. | 9683. | 36.8. | 34.22 | 11.8. | 11.8. | 2392. | 1500. Oct 30. | 330. | 10013. | 30.6. | 34.08. | 12.8. | 12.25. | 1320. | 1470. FRONT SPRINGS. Woodhead's 20% Stiffer than Standard. Drg: No:- F.71785. Piece No:- F.71792. TYPE:- 1200 & 1250 lbs. Camber after 10,000 miles test:- N/S:- 2.75 ins O/S:- 2.85 ins. [Faint watermark text] ARMSTRONG SIDDELEY MOTORS [Handwritten signature] H Hiley | ||