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 second endurance test of a Bentley V test car, detailing the mileage covered by various engine components.
| Identifier | ExFiles\Box 97\2\ scan0060 | |
| Date | 26th April 1939 | |
| 400 & 400b. 7.G copy To Sg.{Arthur F. Sidgreaves - MD} Mx.{John H Maddocks - Chief Proving Officer} Hs.{Lord Ernest Hives - Chair} GWH.{George W. Hancock - Head Chateauroux} Hy.{Tom Haldenby - Plant Engineer} HPS.{Horace Percy Smith - Experimental Factory Mgr}( 2 copies) RHO. All testers. Ds. Rm{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux}1/BA.26.4.39. S.B.V. - Bentley V.{VIENNA} 15,000 miles test car. The second endurance test on this car is now completed. 1st test. 18,500 miles. 2nd " 31,800 " Total. 50,300 " The mileage covered by the various components, which completed the running is as follows :- Engine Unit No.7. Miles. Main components. 31,800 . No.12 Rocker and No.12 Valve Guide. 29,694 . 12 Valve Springs ex 27.G.VI. 28,595 . 3 Inlet Valves made by Motor Components Ltd. 44,431 . C & A Washers on float chamber banjos. 24,294 . Spring on Starter Carburetter Needle. 24,294 . R.R.Distributor. 29,045 . Dynamo and Regulator. 10,834 . Clutch Plate. 16,789 . 35° Thermostat for Starting Carburetter. 16,784 . Starting Carburetter with anti-freeze arrangement. 16,784 . Exhaust Valves. 5,275 . continued. | ||