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).
Manufacturing feasibility and specifications for a servo worm gear assembly.
| Identifier | ExFiles\Box 16\3\ Scan014 | |
| Date | 23th November 1927 | |
| To BY.{R.W. Bailey - Chief Engineer} from DA.{Bernard Day - Chassis Design} c. to BJ. Hs.{Lord Ernest Hives - Chair} 47870 DA{Bernard Day - Chassis Design}3/M23.11.27. EAC.10. GEARBOX. X.7310 X.7870 Herewith we send N.sch. 2508 shewing the assembly of the servo worm gear. The object of sending you this is to ascertain that the worm can be cut and ground on the hub of the great wheel as shewn, and secondly to ask you to send drgs. of the blanks to Messrs. Bostock & Bramley. so that they may make us a specimen pair. We estimate that the max. torque the worm will be asked to transmit is 2,000 lbs.ins. The worm speed we think should be taken at between 600 and 800 revs. a minute, representing approx. the slowest speed at which the servo is likely to be used for any length of time. DA.{Bernard Day - Chassis Design} | ||