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).
Redesigns for the Goshawk 11 Dynamo Drive, oil pump, and solutions for various oil leaks as per Mr. Royce's instructions.
| Identifier | ExFiles\Box 77\1\ scan0170 | |
| Date | 14th December 1921 | |
| To Hs.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} c. to CJ. c. to Wor.{Arthur Wormald - General Works Manager} c. to Da.{Bernard Day - Chassis Design} c. to EY. X4232 E2/M14.12.21. X.3522 X.4232 GOSHAWK 11. DYNAMO DRIVE - OIL PUMP etc.etc. With reference to the G.11. Dynamo Drive, kindly note, we are redesigning this to provide the gear wheel with separate bearings so that the engine gears will not be interfered with when the dynamo is changed. We shall let you have this scheme as soon as possible as it is very urgent to complete the form of the crankcase to the final design as soon as possible. With regard to the oil pump, Mr. Royce would like to run one in the open with various fits on the main driving spindle to see how much oil comes out of the gland. This is with a view to determining what supply of lubricant we are to expect in production for the oil pump gear wheel drive case. Referring to the leak that existed on this case on the last G.11. chassis brought to W.W., Mr. Royce would like to know if it is due to oil passing from the wheel case through the hollow shaft on the driving gear wheel. With regard to the oil leak that exists on the valve tappet covers Mr. Royce would like you to try a layer of felt in the joint between the tappet covers and the cylinder block. The felt should be made to adhere to the cover plates with shellac. He would like you to try also a horizontal rib on the cover plate for guarding the bottom portion of the cover from oil with the ends of the rib turned up in such a manner that the oil cannot drain out again on the joint. Mr. Royce also remarks we might arrange to put extra pressure on the ends of the cover plates where they are likely to leak. E.{Mr Elliott - Chief Engineer} | ||