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).
Test results for oil flow from the relief valve to the rocker shaft under various conditions.
| Identifier | ExFiles\Box 106\5\ scan0116 | |
| Date | 28th September 1933 | |
| OIL FLOW FROM RELIEF VALVE TO ROCKER SHAFT. No.1. Test. Using 3/16" Dia. Piping, 4 ft. long. | ENGINE RPM. | TIME FOR 1 PINT. | PTS/HR. | ROCKER SHAFT OIL PRESS. | OIL TEMP. START | OIL TEMP. FINISH. | |---|---|---|---|---|---| | 1000 | 3 mins 38 secs | 16.51 | 8 lbs/sq.in. | 70°C | 70°C | | 2000 | 2 " 23 " | 25.17 | 10.5 " | 70°C | 76°C | | 3000 | 1 " 56 " | 31.03 | 12.0 " | 70°C | 78°C | | 3500 | 1 " 44 " | 34.61 | 15.0 " | 70°C | 82.5°C | No.2 Test. As No.1 Test using 5/16" dia. piping. 3 ft. 9" long. | ENGINE RPM. | TIME FOR 1 PINT. | PTS/HR. | ROCKER SHAFT OIL PRESS. | OIL TEMP. START | OIL TEMP. FINISH. | |---|---|---|---|---|---| | 1000 | 20 secs | 180 | 8 lbs/sq.in. | 70°C | 70°C | | 2000 | 13 " | 277 | 10.5 " | 70°C | 71.5°C | | 3000 | 12 " | 300 | 12.0 " | 70°C | 73°C | | 3500 | 11.5 " | 313 | 15.0 " | 70°C | 74°C | No.3 Test. As No.2 Test, but oil passing through a standard Zenith petrol filter. | ENGINE RPM. | TIME FOR 1 PINT. | PTS/HR. | ROCKER SHAFT OIL PRESS. | OIL TEMP. START | OIL TEMP. FINISH. | |---|---|---|---|---|---| | 1000 | 22.5 secs | 160 | 8 lbs/sq.in. | 70°C | 70°C | | 2000 | 15 " | 240 | 10.5 " | 70°C | 71.5°C | | 3000 | 14.5 " | 248 | 12.0 " | 70°C | 73°C | | 3500 | 14 " | 257 | 15.0 " | 70°C | 74°C | | ||