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).
Progress report on engine units B.80 No.4, W.III No.4, and B.60 No.1, detailing tests and issues.
| Identifier | ExFiles\Box 155\2\ scan0337 | |
| Date | 9th August 1939 | |
| -3- B.80 No.4. Unit Cont'd.{John DeLooze - Company Secretary} Endeavour should be made to cure oil leak past wheelcase also effect of alteration to spring pinion on rattle. If successfull complete tests in accordance with memo. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}8/MH.{M. Huckerby}30.6.39. W.III No.4. Unit. Assembly to be progressed. Is equipped with standard B.V. induction system (Cast in starter passage). Now fitted with 3 new Vandervell 3 layer big end bearings and 3 Whitemetal giving a diametrical clearance of .00225 - .003. Test foremost the induction system and starter etc. Secondly carry out investigation of low speed full throttle gear rattle. If possible try greater movement for spring drive springs as from cam diagrams crank is punching on to its spring stops. Try also rubber blocks instead of springs. Bearing endurance is now a secondary as Vandervell's say 3 layer bearings supplied are not best can do. Improved bearings forthcoming. No.5. Test House. B.60 No.1 Unit (Chain drive). Endurance running dependant upon Rm{William Robotham - Chief Engineer}'s interview with chain makers. In meantime take oscillations on camshaft and crankshaft to note whether crank oscillation come through to camshaft as in case of geared job recently carried out by Rm{William Robotham - Chief Engineer}/JRS. If chain approved by makers return unit to shop for following to be fitted to run endurance | ||