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 results for the Phantom II suspension, specifically rebound control and axle movement.
| Identifier | ExFiles\Box 16\7\ Scan328 | |
| Date | 18th November 1930 | |
| COPY. X7410. To R.{Sir Henry Royce} From Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c.c. to Sg.{Arthur F. Sidgreaves - MD} c.c. to Wor.{Arthur Wormald - General Works Manager} Da.{Bernard Day - Chassis Design} c.c. to E.{Mr Elliott - Chief Engineer} Hy.{Tom Haldenby - Plant Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} 2/AD18.11.30. X. 7410. X. 7350. PHANTOM II SUSPENSION. With reference to the attached tests. The amount the rebound can be restrained must depend largely on the violence with which the axle is brought to rest. Given a progressive control there might be little disadvantage in making the bump and rebound of similar dimensions. This will certainly have no effect on normal riding conditions when the axle movement is considerably less than 2" either side of the normal position (see curve attached to Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}2/LG29.10.28). (X7410) Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||