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).
Internal order specifying dimensions for Phantom II front and rear road springs for chassis 23-EX.
| Identifier | ExFiles\Box 16\7\ Scan218 | |
| Date | 6th January 1930 | |
| To O.O. From Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} x 7410. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}7/MJ.6.1.30. X.7410 X.7941c. PHANTOM 11 ROAD SPRINGS. Will you please order for us:- Two Phantom 11 Rear Road Springs. Free Camber 5.06" Pos. Normal Loaded Camber 1.13" Neg. Maximum Bump 4.85"Neg. Poundage 1150 to normal camber. Other dimensions to be similar to those shewn on F.79439 except the number of plates which it should be possible to reduce and the total spring weight which we hope will not be more than 65 lbs., as the total spring deflection has been reduced 25%. Two Phantom 11 Front Road Springs. Free Camber 2.00" Pos. Normal Loaded Camber .2" Neg. Maximum Bump 2.10" Neg. Poundage 1050 to normal camber. Other dimensions to F.78792 but it should be possible to make this spring lighter and with fewer plates than the standard as in the case of the rear springs mentioned above. These springs are for chassis 23-EX. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||