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).
List of parts fitted and tested on a test car, detailing the mileage each component achieved.
| Identifier | ExFiles\Box 108\3\ scan0175 | |
| Date | 6th April 1938 | |
| To Rm.{William Robotham - Chief Engineer} from Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux} c. HPS.{Horace Percy Smith - Experimental Factory Mgr} c. HPS{Horace Percy Smith - Experimental Factory Mgr}/RH.{R. Hollingworth} c. Rm{William Robotham - Chief Engineer}/wym.{G. Harold Whyman - Experimental Manager} d.{John DeLooze - Company Secretary} All testers. Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux}8/MH.{M. Huckerby}6.4.38. 26.O.VI - 25/30. 15,000 MILES TEST CAR. List of Parts fitted during Test and miles run. MILEAGE. 5 EB.3256 Valve springs in Swedish wire made at R.R. to Nos. 1, 2, 3, 5, and 6. - 17,053 6 EW.1428 Valve springs in Swedish wire made by Tempered Spring Co. to Nos. 7, 8, 9, 10, 11, and 12. (These are instructed for production.) - 10,000 1 EW.1428 Valve spring in S/CV., re-fitted to No.4 after breakage of EB.3256 spring. - 18,615 12 5/16" dia. push rods. - 17,053 12 Modified bottom tappets. - 10,000 12 Valve grummets with 6' of material instead of 4' - 17,053 1 Front rocker pedestal with hexagon head location screw and locking plate. - 17,053 6 E.61299 exhaust valves. - 10,000 8 Special non-standard springs in slipper wheel to give 10 lbs. at 17" radius. - 6426 3 Washers under rocker cover nuts to overcome oil leaks. - 3,115 1 Delco ignition coil with no ballast resistance. - 13,946 1 R.R. distributor. (Reconditioned on return to Derby) - 11,685 | ||