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).
Production parts and test results for the Big Bore Bentley & 6-B-IV.
| Identifier | ExFiles\Box 82\4\ scan0212 | |
| Date | 30th December 1935 | |
| To Sg.{Arthur F. Sidgreaves - MD} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}3/KW.30.12.35. Big Bore Bentley & 6-B-IV. Replying to Sg.{Arthur F. Sidgreaves - MD}6/E.18.12.35, referring to Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}4/KW.14.12.35. The parts mentioned on page 2 which will go into production are as follows :- 1, 2, 3, 4, 5 & 6; also item 10 on page 3. In the case of 6, the clutch is a 10" Borg and Beck, but it is unventilated. Items 1 and 3 were not fitted to B-56-BN.{W.O. Bentley / Mr Barrington} However, we have done over 100 hours on the bench with item 1, with entirely satisfactory results. Item 3, as we point out, is the limiting feature at present. We have had 50 hours successful running on the big ends. We have not yet had a satisfactory 50 hour run on the mains. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||