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 tables showing heat flow to jacket water for a Hispano engine under different conditions.
| Identifier | ExFiles\Box 22\1\ Scan203 | |
| Date | 1st October 1924 guessed | |
| -3- HISPANO HEAT FLOW TO JACKET WATER. Max. figures for Ht. flow. Ht. flow in B.T.H.U's/min. | Eng. revs. | HP. at road wheels. | Cons: Pts. hr. | Heat supplied by fuel. | Heat flow to water/min. | Ht. to water x 100 / Ht. supplied | |---|---|---|---|---|---| | 500 | 20.3 | 16.8 | 4925 | 1253 | 25.4 | | 1000 | 43.3 | 29.6 | 8730 | 2079 | 23.8 | | 1500 | 68.6 | 50.0 | 14750 | 2730 | 18.5 | | 2000 | 84.8 | 54.25 | 16000 | 3420 | 21.4 | Ht. flow when using rich mixture. | 1000 | 42.5 | 40.9 | 12080 | 1590 | 13 | | 2000 | 83.75 | 77.6 | 22900 | 2770 | 12 | Hs{Lord Ernest Hives - Chair}/ACL. | ||