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 modification of the Bentley sump drain plug to improve ground clearance.
| Identifier | ExFiles\Box 132\3\ scan0018 | |
| Date | 14th December 1933 | |
| X216 To BY.{R.W. Bailey - Chief Engineer} from E/JNR.{Charles L. Jenner} E/JNR.{Charles L. Jenner}6/HP.14.12.33. c. Wor.{Arthur Wormald - General Works Manager} Hs.{Lord Ernest Hives - Chair} Bentley Sump Drain Plug. Please receive herewith: LeC.3735 showing a drain plug at the side of the crankcase arranged in an accessible position. This will considerably improve the ground clearance under the engine. This should be instructed for the second series Bentley. We have already sent you LeC.3727 showing the modified plug at the bottom of the strainer. This can be used for special customers, or if it should be decided to alter some of the first series cars. We see no reason why the side drain plug could not be brought in on the 20/25 HP. though in this case we have a very much better ground clearance than on the Bentley. E/JNR.{Charles L. Jenner} | ||