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 failure of a lightened Camwheel, including total running times.
| Identifier | ExFiles\Box 98\5\ scan0033 | |
| Date | 16th May 1940 | |
| 407 To Rm.{William Robotham - Chief Engineer} from HPS{Horace Percy Smith - Experimental Factory Mgr}/RH.{R. Hollingworth} c. Rm{William Robotham - Chief Engineer}/Ev.{Ivan Evernden - coachwork} c. Rm{William Robotham - Chief Engineer}/HH. c. Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation} HPS{Horace Percy Smith - Experimental Factory Mgr}/RH.{R. Hollingworth}3/SW.16.5.40. Camwheel EB.3955/6 Mod to Rm.{William Robotham - Chief Engineer}619. Herewith photographs showing failure of the above lightened Camwheel. Running times as follows:- Full Throttle - 19 hrs. 30 mins Part Throttle - 4 " 35 " TOTAL 24 hrs. 5 mins. HPS{Horace Percy Smith - Experimental Factory Mgr}/RH{R. Hollingworth} RH{R. Hollingworth} | ||