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).
Test results for two types of Bentley III rear axle shafts with different bearings.
| Identifier | ExFiles\Box 98\1\ scan0146 | |
| Date | 24th March 1939 | |
| 402. To Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls} from HPS{Horace Percy Smith - Experimental Factory Mgr}/Bl. HPS{Horace Percy Smith - Experimental Factory Mgr}/Bl.3/CB.24.3.39. BENTLEY III REAR AXLE SHAFT TESTS. Herewith statement of running times, speeds and loads for the two types of shaft - 45 m/m and 40 m/m bearings - tested to date :- 45 m/m.{Mr Moon / Mr Moore} 1.0 ton. 1,000 R.P.M. 101 hours. 1.5 " 667 " 100 " 2.0 " 500 " 111 3/4 " * * Noise developed approximately 20 hours before rig was stopped. 40 m/m.{Mr Moon / Mr Moore} 1.0 Ton. 1,000 R.P.M. 100 hours. 1.5 " 667 " 100 " 2.0 " 500 " 75 " The shafts, bearings, etc. are herewith submitted for your inspection, but we would like them back later for crack testing. HPS{Horace Percy Smith - Experimental Factory Mgr}/W. Bell. W. Bell | ||