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).
Comparing valve gear lubrication oil pressures during engine warm-up versus normal running conditions.
| Identifier | ExFiles\Box 17\6\ Scan088 | |
| Date | 1st February 1929 | |
| X7060 E2/M25. 2. 29. R.{Sir Henry Royce} from E.{Mr Elliott - Chief Engineer} c. to Sg.{Arthur F. Sidgreaves - MD} Hs.{Lord Ernest Hives - Chair} BY.{R.W. Bailey - Chief Engineer} RE. VALVE GEAR LUBRICATION. X. 7060 X. 7010 The attached report Hs{Lord Ernest Hives - Chair} 7/LH{Mr Haworth}19. 2. 29 shews that the intermediate oil supply as we anticipated reaches quite a high pressure during the warming up period, and might therefore be used to get oil to the valve gear early. The comparison with normal running pressures is as follows : WARMING UP. NORMAL. HIGH........... 32 lbs/sq.in. 25.0 INTERMEDIATE..... 16 " " 3.5 LOW............ 5.5 " " 1.75 e.{Mr Elliott - Chief Engineer} | ||