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).
Performance chart for a Buick oil cooler, showing oil to water heat transmission characteristics.
| Identifier | ExFiles\Box 149a\2\ scan0311 | |
| Date | 1st December 1933 | |
| CHART O/19 A BUICK OIL COOLER OIL TO WATER HEAT TRANSMISSION FRONTAL AREA TO WATER FLOW = 1 FT² COOLING SURFACE " " = 27.2 FT² " " " OIL = 23.8 FT² NO. OF TUBE COMBS = 2020 DEPTH OF FILM = 3 3/4" OIL USED - MOBILOIL 'A' CONSTANT OIL FLOW = 600 LBS/MIN CONSTANT WATER FLOW = 260 GALLS/MIN 2 PASS FOR OIL FLOW OIL TEMP 170°F HONEYCOMB FILM. FRONT VIEW SECTION SHADED AREA INDICATES OIL PASSAGE Vertical Axis Label: B.T.U.'S / HOUR / FT² WATER / COOLING SURFACE / °F LOG. T.D. Horizontal Axis Label (Middle): OIL FLOW LBS/MIN. Horizontal Axis Label (Bottom): WATER FLOW GALLONS/MIN. Curve Labels: OIL RATE, WATER RATE Annotation: WATER VEL. / FT./SEC. EWB 1/12/33 | ||