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).
Table of oil flow test results for a 20 HP engine.
| Identifier | ExFiles\Box 116\1\ scan0142 | |
| Date | 25th August 1937 | |
| 1 25th. August, 1937. OIL FLOW - 20 H.P. ENGINE. ENGINE R.P.M. OIL PRESSURE. OIL TEMP. °C. VISCOSITY REDWOOD. TIME TO PUMP ONE GALLON. FLOW GALLS/HOUR. FLOW CORRECTED TO 50-lb/sq". FLOW CORRECTED to 50°C. and 50-lb/sq". REMARKS. 1000 47-lb/sq". 56°C. 300 0 min 35 secs. 103 110 81 OIL PASSING THROUGH BRGS, RELIEF VALVE 1000 47 " 50 410 0 " 37 " 97 103 103 2000 53 " 45 500 0 " 15 " 240 226 276 AND BYPASS FILTER. 380 50-lb/sq". 48°C. 440 6 " 0 " 10 10 10.7 OIL PASSING THROUGH BEARINGS ONLY | ||