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).
Preliminary tests of hydraulic dampers for the Phantom suspension system, with a bar chart comparing performance.
| Identifier | ExFiles\Box 55\3\ Scan153 | |
| Date | 24th April 1926 | |
| To R. {Sir Henry Royce} from Hs. {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} c.c. to RU. c.c. to BJ. DA. {Bernard Day - Chassis Design} c.c. to SY. Wor. {Arthur Wormald - General Works Manager} c.c. to Na. {Mr Nadin} Handwritten: V8410 Handwritten: X235 Hs {Lord Ernest Hives - Chair} /RmL/LG24.4.26. PHANTOM SUSPENSION! Handwritten: V8410 We have carried out some preliminary tests with the hydraulic dampers on the rear of the car. These were arranged as single acting, giving a checking load of 60 lbs. on the rebound. So far it appears that these would be better than the corresponding friction shock dampers for a given load but they will not make any very great difference to the riding complaint. We are continuing the test to confirm these results and to determine the best setting for these dampers on the rear. [Bar chart data] - Bar 1: 64 c.c. / 60 lbs. friction. - Bar 2: 59 c.c. / 60 lbs. friction single acting. - Bar 3: 54 c.c. / 25 lbs. friction. - Bar 4: 46 c.c. / No friction. Road speed 23 m.p.h. 40/50 HP. Phantom. Tyre pressures 40 and 45 Conditions otherwise as in Tests 1.b. | ||