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).
Radiator performance test results for a 40/50 HP engine under various conditions.
| Identifier | ExFiles\Box 38\2\ Scan212 | |
| Date | 26th September 1924 guessed | |
| RADIATOR TESTS ON 40/50 HP. Temp. in °C. but Ht. units in B.T.Us. per min. | Condit ions. | Eng. revs. per min. | Lbs. of water passing through radiator per min. | Radiator water. | Air flow through core. | H.{Arthur M. Hanbury - Head Complaints} B.T.Us. min. accounted for by Radiator | |---|---|---|---|---|---| | | | | Top temp. | Bottom temp. | Entering air temp. | Leaving air temp. | | | With bonnet - standard Fan. | 507 | 63.8 | 89.75 | 81.5 | 28 | 54 | 947 | | | 1014 | 112.5 | 91 | 84 | 29 | 48.5 | 1417 | | | 1521 | 175.3 | 91 | 84 | 29.5 | 42.5 | 2210 | | | 2028 | 226.5 | 90.25 | 85.5 | 29 | 49 | 1935 | | Bonnet removed - standard Fan. | 507 | 63.3 | 91 | 80.75 | 20.5 | 45 | 1150 | | | 1014 | 115 | 92.25 | 83 | 23 | 40 | 1915 | | | 1521 | 173 | 91 | 83.5 | 24 | 40.5 | 2310 | | | 2028 | 234 | 91.5 | 86 | 25 | 41.5 | 2320 | | With bonnet - 3-blade Fan. | 507 | 63.8 | 90 | 83 | 25.5 | 58 | 805 | | | 1014 | -- | -- | -- | -- | -- | --- | | | 1521 | 170 | 90 | 84 | 27 | 53.5 | 1837 | | | 2028 | 231 | 91 | 86 | 25.5 | 51 | 2079 | | ||