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).
Requesting the design of a new linkage for a universal servo for hydraulic brakes, specifically for the Wraith 80 model.
| Identifier | ExFiles\Box 152\2\ scan0230 | |
| Date | 21th September 1938 | |
| 129H also666 By/ALD.{F. Allwood - Experimental Design} from Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} c. By.{R.W. Bailey - Chief Engineer} c. Da.{Bernard Day - Chassis Design} Rm{William Robotham - Chief Engineer}/AFM{Anthony F. Martindale}1/R.21.9.38. UNIVERSAL SERVO - HYDRAULIC BRAKES. As Wraith 80 is going to have hydraulic front brakes, it is quite obvious that ultimately all cars will have the same hydraulic front brakes, and a new economical linkage will be required. We want to halve the torque on the servo shaft so that we can use an aluminium worm wheel, which saves at least 2/-. We can do this by using a tappet and cam servo, which is in itself a simplification, as well as giving perfect geometry. This type of operation is suitable for the master cylinder actuation. Will you please design a linkage of this type that we can test on a rig before any official schemes have to be issued. There is no immediate urgency, will you tackle the job when not busy on other things. Rm{William Robotham - Chief Engineer}/AFM.{Anthony F. Martindale} | ||