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).
Status report on tests being carried out on Bentley III, Bentley 60 and Bentley II engine units.
| Identifier | ExFiles\Box 155\2\ scan0256 | |
| Date | 11th November 1938 | |
| 1315 To Rm.{William Robotham - Chief Engineer} c. to Rm{William Robotham - Chief Engineer}/Sys. c. to Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation} POSITION OF & TESTS BEING CARRIED OUT ON BENTLEY III & BENTLEY 60 & BENTLEY II UNITS. Bentley III No.1 (Test bed). Main bearings without shims 'mock-up' (W/M) Wraith balance weights. Standard raith big ends, thin section with flanges but in A.C.6 die cast. EW.1854 cylinder head obsolete non strengthened but with correct size valves 1.5 and 1.3 Raised crown Aerolite pistons (Rm.{William Robotham - Chief Engineer}522) which with .030 head washer (klingerit) give compression ratio 6.6 : 1. Up to date belco distributor with spring drive EX.31550 camshaft (rapid opening toes) Up to date camwheel not chamfered on teeth .2 S.U. 1.5 dia. with auto starter. A.C. bye-pass oil filter. Bentley III No.2 (V.B.V). As B.III No.1 except - original raith type AC.6 thick section with keyed shims. Original large valve cylinder head. EB.3466 camshaft (original B.III type similar to M series Bentley. General type of oil filter. Obsolete type of Fabroil camwheel. | ||