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).
Programme of test bed work for the B.80 No. 5 unit, detailing special features and subsequent tests.
| Identifier | ExFiles\Box 155\2\ scan0327 | |
| Date | 15th June 1939 | |
| 1315 To Rm.{William Robotham - Chief Engineer} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} c. Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation} Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}4/MH.{M. Huckerby}15.6.39. PROGRAMME OF TEST BED WORK. Further to memo Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}8/JH.25.5.39. B.80 NO.5 UNIT. New unit now being assembled for test prior to being fitted in 30.G.VII for 15,000 miles test. Special features include:- (1) 2 3/4 journal crankshaft ex B.80 No.4 unit. (2) Vandervell 3-layer main bearings. (3) 4 inlet valve springs (parallel in Swedish wire) 4 " " (taper in S/SV. Ph.III type). (4) Crankcase cast in Ni-Cro-Mo. Nos. 1, 2, 7 and 8 Solid bores. Nos. 3 and 4 Hichro short inserts. Nos. 5 and 6 Ni-Cro-Mo short inserts (5) Exhaust valve seats. Nos. 1, 2, 3 and 4 solid. Nos. 5 and 6 Ni-Cro-Mo R.R. produced. Nos. 7 and 8 Brico seats. Inlet valve seats in 3 1/2% nickel. (6) Studebaker crank damper. (7) EB.4512 short duration camshaft. After running in, the following tests to be carried out:- (1) Power curve (previously found best valve timing) both open exhaust and with Buick type exhaust system. (2) Valve bounce (Inlets) speed also with silencer. Cont'd.{John DeLooze - Company Secretary} | ||