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).
Specifications and alternatives for pull off springs for front brakes.
| Identifier | ExFiles\Box 73\2\ scan0210 | |
| Date | 23th January 1924 | |
| X.9940 To Hs.{Lord Ernest Hives - Chair} from Da.{Bernard Day - Chassis Design} S E C R E T. Da{Bernard Day - Chassis Design}8/M23.1.24. E.{Mr Elliott - Chief Engineer} A.{Mr Adams} C. PULL OFF SPRINGS TO FRONT BRAKES. X.9940 Replying to your Hs{Lord Ernest Hives - Chair}3/LG21.1.24, we have not given any instructions about these pull off springs except the axial twist springs on N.scheme 1716, which Mr. Royce the last time we discussed it with him seemed to prefer to the tension springs. We presume that what you want is some tension springs which will replace the original ones you are now using so that you may fit them to existing axles instead of waiting for the modified parts on N.scheme 1716. We will send you some springs with this. DA.{Bernard Day - Chassis Design} Wire. .072 Mean Rad. .264 No. of coils. 23 Final load. 23.75 lbs. Initial load. 13 lbs. Initial stress. 46700 Final stress. 85000 Initial torque. 18 lbs. ins. Final torque. 23.75 lbs.ins. All other as that on N.scheme 1377. DA.{Bernard Day - Chassis Design} This springs may prove too light, but approximates to the torsion springs, and we should like it as light as possible. BY.{R.W. Bailey - Chief Engineer} from Hs.{Lord Ernest Hives - Chair} Recommend you also instruct springs 20% stronger than these. Hs.{Lord Ernest Hives - Chair} | ||