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).
The sprung and unsprung weight calculations for chassis 1800.
| Identifier | ExFiles\Box 3\3\ 03-page033 | |
| Date | 25th October 1911 | |
| Weights (of sprung & unsprung chassis). 3700. Weight of chassis 1800. Full with Oil, Water, Petrol, & Tyres. cwts qrs lbs lbs Front 14 0 1 = 1569 Rear 12 2 27 = 1427. Total 26 3 0 = 2996. Unsprung weight i.e. (Weight released all spring shackles bolts taken out.) cwts qrs lbs lbs front 2 3 14 = 322. rear 5 1 8 = 596 Total 8 0 22 = 918. Therefore load on each front spring . = 624 lbs rear . = 416 lbs Handwritten notes: Top right: 25-10-11. X280 Bottom left: Tyres filled with air not weighed L.R 25/10/11 Bottom right: 20lbs for jack & tools 40 lbs full tank | ||