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 specifications of Hispano front springs.
| Identifier | Morton\M4.1\ img036 | |
| Date | 12th July 1923 | |
| R.R. 493A (40 H) (SL 42 12-7-23). J.H., D.{John DeLooze - Company Secretary} EXPERIMENTAL REPORT. Expl. No. 4214 REF: Hs{Lord Ernest Hives - Chair}3/L.G11.3.24. To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to C.J. RG.{Mr Rowledge} c. to E.{Mr Elliott - Chief Engineer} DA.{Bernard Day - Chassis Design} c. to EY. WOR.{Arthur Wormald - General Works Manager} PARTICULARS OF HISPANO FRONT SPRINGS. Length --------------------- 39.5" Centre bolt to front end --------- 17.25" " " rear " --------- 22.25" Leaves ----------------------- 12 Width ------------------------ 2.31" Initial camber --------------- 2.56" Rating ----------------------- 430 lbs/ins. deflection. For a 40/50 car having similar weight on the front axle, we should at present fit front springs with a rating of 315 lbs. per inch. When we fit front wheel brakes, the rating of the front springs will be 420 lbs. per inch. It will be seen that the rating of the Hispano front springs is not as high as we anticipated. It may be the riding was effected by very stiff shock absorbers - this can be checked when the car is again on the road. Hs.{Lord Ernest Hives - Chair} | ||