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).
Graph plotting oil pressure drop across a seamed tube oil cooler against oil flow for different mean oil temperatures.
| Identifier | ExFiles\Box 131\1\ scan0230 | |
| Date | 4th December 1935 | |
| OIL PRESS. DROP ACROSS SEAMED TUBE OIL COOLER. 6 PASSAGES IN SERIES FOR OIL FLOW. EACH PASSAGE HAS 8 LOOPS DEEP. FIGURES ON CURVES ARE MEAN OIL TEMPS. OIL FLOW LBS/MIN OIL PRESS. DROP ACROSS COOLER. INS. OF MERCURY. 170°F 188°F 10, 20, 30 10, 20, 30 Hulton | ||