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).
Modifications to rear axle oil drain holes to prevent them from choking with mud.
| Identifier | ExFiles\Box 12\2\ 02-page047 | |
| Date | 7th February 1929 | |
| BY: from DA.{Bernard Day - Chassis Design} c. to SG.{Arthur F. Sidgreaves - MD} Hs.{Lord Ernest Hives - Chair} X. 7350 DA{Bernard Day - Chassis Design}1/M7.2.29. SS.{S. Smith} Rear Axle - OIL DRAIN HOLES. With reference to the trouble of the oil drain holes both from the inner hub and from the toggle shaft bearings choking up with mud on the 10,000 mile test, it appears to us from the report and sketch attached to Hs{Lord Ernest Hives - Chair}/Rml/LG25.D.29. that you are using the original EAC.7. construction on these brake shafts, in which the location is at both ends instead of at one end only, as was arranged on the later scheme for EAC.14 shewn on your drg. G.76350. It was R's wish that we should convert EAC.7. and SS.{S. Smith} to the scheme on G.76350. It would be possible to do what CWH. suggests on the EAC.7. scheme though we doubt whether it would be a complete solution, but it is not possible on the G.76350 scheme. We also think that a better proposal is to cover the ends of the pipe with a shield, so giving a wide aperture which would we believe be very difficult to entirely block up with mud. We have shewn what we suggest on N.Sch. 2815 herewith. The bearing brackets are altered, and we have also brought the main oil drain from the inner hub into line with the latest instructions. We are sending you a scheme in a short while dealing with the other end of these shafts. DA.{Bernard Day - Chassis Design} | ||