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).
Comparison of valve gear oil pressures during warming up and normal running periods.
| Identifier | WestWitteringFiles\T\January1929-February1929\ Scan192 | |
| Date | 25th February 1929 | |
| ORIGINAL SECRET. E2/M25.2.29. FROM E.{Mr Elliott - Chief Engineer} Copy to HS.{Lord Ernest Hives - Chair} " " re. VALVE GEAR LUBRICATION. x7060 x7010 The attached report HS{Lord Ernest Hives - Chair}7/LG19.2.29., 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.per sq.in. 25. O.{Mr Oldham} INTERMEDIATE...... 16 " 3. 5. LOW............. 5.5 " 1.75. E.{Mr Elliott - Chief Engineer} | ||