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).
Testing for oil leakage from the rear hubs and axle under high temperatures.
| Identifier | ExFiles\Box 49\2\ Scan193 | |
| Date | 24th October 1924 | |
| R.R. 460A (20M) (D.A. 853 30-5-24) F.B.D. EXPERIMENTAL REPORT. Expl. No. REF: REAR AXLE. Leakage of oil from rear hubs when the rear brakes are excessively used. Test carried out on 49 G.B. re- memo BY8/H.{Arthur M. Hanbury - Head Complaints} 14. 7. 24. Both rear brake drums dismantled & ball races packed with grease, an empty air pocket being left between the inner & outer races outside the distance piece. On erection one syringe full of oil was injected through the outside of the rear hub. Oil in rear axle leveled up. Maintained a fairly high temperature on rear brake drums, without smoking for two hours constant. No oil or grease leakage on inspection externally. GHRatcliffe | ||