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 oil pressures for valve gear lubrication during engine warming up versus normal operation.
| Identifier | ExFiles\Box 14\2\ Scan036 | |
| Date | 2nd February 1929 | |
| X7010 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/LHd9. 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} | ||