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).
Comparison table of three different oil cooler models.
| Identifier | ExFiles\Box 131\1\ scan0212 | |
| Date | 18th August 1936 | |
| 18th August, 1936. TABLE I OF ROLLS ROYCE OIL COOLERS | | 0/32 (GALLAY COOLER) Rolls Cooler No. 1 with seamed oval tubes | 0/33 Rolls Cooler No. 2 large honeycomb | 0/34 Rolls Cooler No. 3 Smaller honeycomb | |---|---|---|---| | WATER CONDITION | | | | | Water flow lbs/min. | 400 | 400 | 400 | | Press drop across Cooler at above flow. ins. mercury | 44 | 44 | 50 | | Water temp. (inlet) | 80° C. = 176° F.{Mr Friese} | 80° C. = 176° F.{Mr Friese} | 80° C. = 176° F.{Mr Friese} | | OIL CONDITION | | | | | Oil flow lbs/min. | 53 | 53 | 53 | | Press. drop across Cooler at above flow ins. mercury | 1.16 | 1.5 | 5.15 | | Oil temp (inlet) | 115° C. = 239° F.{Mr Friese} | 115° C. = 239° F.{Mr Friese} | 115° C. = 239° F.{Mr Friese} | | Temp. diff. water inlet to oil inlet | 35° C. = 63° F.{Mr Friese} | 35° C. = 63° F.{Mr Friese} | 35° C. = 63° F.{Mr Friese} | | B.T.US/hr. dissipated | 13200 | 15,100 | 20,200 | | Weight of matrix lbs. | 3.175 | 2.7 | 2.85 | | ||