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 test results for hydraulic dampers on a Phantom suspension system, including a comparative bar chart.
| Identifier | ExFiles\Box 67a\1\ scan0167 | |
| Date | 24th April 1926 | |
| To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. to Bd.{Mr Berend} RG.{Mr Rowledge} c. to E.{Mr Elliott - Chief Engineer} DA.{Bernard Day - Chassis Design} c. to BY.{R.W. Bailey - Chief Engineer} Wor.{Arthur Wormald - General Works Manager} c. to Na.{Mr Nadin} Handwritten: X8410 PHANTOM SUSPENSION. Handwritten: X8410 (crossed out) 4235 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. with 60 lbs. friction. - Bar 2: 59 c.c. with 60 lbs. friction single acting. - Bar 3: 54 c.c. with 25 lbs. friction. - Bar 4: 46 c.c. with No friction. Test Conditions: Road speed 23 m.p.h. 40/50 HP. Phantom. Tyre pressures 40 and 45. Conditions otherwise as in Tests 1.b. | ||