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).
Oil leak issue with the change gear bracket breather hole and suggesting design modifications.
| Identifier | ExFiles\Box 14\6\ Scan106 | |
| Date | 14th August 1929 | |
| X7230 filing To Ey. from Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux} c.c. to MX.{John H Maddocks - Chief Proving Officer} c.c. to Da.{Bernard Day - Chassis Design} Da{Bernard Day - Chassis Design}/GWH.{George W. Hancock - Head Chateauroux}1/MJ.14.8.29. "S.S." CHANGE GEAR BRACKET G.77500 ------------- X7770 X7230 We notice the breather hole has been drilled in the side of the bracket on the production cars and oil leaks out. The air vent on the experimental cars was drilled at the top with the result that no oil leaks occurred. If it is considered unsuitable to drill the hole at the top, we should recommend that it be drilled at 45° to prevent the oil leaking out readily. A baffle might be fitted to prevent the oil being flung into the tube from the gear wheels. G.W.H. | ||