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).
Data table from 'Test (3)' detailing flow rates, temperatures, and heat extraction for a cooler and by-pass system.
| Identifier | ExFiles\Box 131\1\ scan0064 | |
| Date | 17th February 1933 | |
| -3- Test (3). Time for 1 qt. from by-pass. Secs. | By-pass flow lbs/min. | Cooler flow lbs/min. | Inlet Temp. °C. | Outlet Temp. °C. | Drop in Temp °C. | Heat to Oil in BTU's/min. | BTU's extracted per min. per deg. difference betwn mean oil temp. and water temp. - | 0 | 20.6 | 100 | 93 | 7.0 | 130 | 4.92 25.5 | 3.38 | 15.22 | 100 | 92.8 | 7.2 | 93.5 | 3.74 15.0 | 9.15 | 11.45 | 100 | 92.0 | 8.0 | 82.5 | 3.17 12.0 | 11.43 | 9.17 | 100 | 91.8 | 8.2 | 67.5 | 2.61 10.0 | 13.72 | 6.88 | 100 | 87.0 | 13.0 | 80.5 | 3.45 9.0 | 15.25 | 5.35 | 100 | 87.0 | 13.0 | 62.5 | 2.67 7.4 | 18.55 | 2.05 | 100 | 84.5 | 15.5 | 28.5 | 1.28 7.0 | 19.60 | 1.00 | 100 | 80.0 | 20.0 | 18.0 | 0.90 Note. Temp. difference in calculation of last column is the difference between the water temp (70°C) and the mean temp. of oil entering and leaving cooler. The results are graphed on the accompanying print. | ||