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 condition of a rear axle after excessive dynamometer test bed work.
| Identifier | ExFiles\Box 92\5\ scan0124 | |
| Date | 13th May 1937 | |
| To [redacted] from R.H. c. to Rm.{William Robotham - Chief Engineer} 302 HPS{Horace Percy Smith - Experimental Factory Mgr}/RH.{R. Hollingworth}1/VS.{J. Vickers}13.5.37. 30.EX. REAR AXLE. Report on condition after excessive Dynamometer Test Bed work. Axle fitted 20. 9. 36. off 25.EX. Total road miles on 30.EX - 1454. Dynamometer - 52 Hrs. 25 Mins. in 3rd speed. 62 " 55 " " 2nd " 1 " 10 " " 1st " NB (83) " 10 " " Overdrive. 2 " 0 " " normal top 60 m.p.h. no load. Overdrive 1 " 0 " " normal top 20 m.p.h. no load. Gearbox. 5 " 0 " " 1st speed. 1 " 0 " " using all gears. accelerating and decelerating maximum 80 m.p.h. Early tests on production dynamometer were conducted without cooling effects and temperatures reached were abnormal compared with road conditions. Oil used from 7.1.37. onwards - Wakefield E.P.(R.R.) Centre Case G.85153. (not ribbed type). General condition good - bores checked for alignment and found O.K. Diff. Box. All exposed surfaces heavily coated with burnt oil, etc. R.H. G.54469. (unstrengthened type). L.H. G.56131. Magnetic tested for cracks and found O.K. Joint faces show signs of fidgetting around stud holes. Driving shaft bushes slightly scored. continued. | ||