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).
Graph comparing heat flow versus horsepower at the road wheels for the 40/50 HP and Hispano models at full load.
| Identifier | WestWitteringFiles\L\July1924-September1924\ Scan15 | |
| Date | 22th September 1924 | |
| HT. FLOW FULL LOAD FOR 40/50 HP & HISPANO. B. Th. Us / MIN. H.P. AT ROAD WHEELS. 40/50 HP FULL LOAD HISPANO FULL LOAD. 22/9/24 ACL Y-Axis values: 0, 1000, 2000, 3000, 4000 X-Axis values: 0, 20, 30, 40, 50, 60, 70, 80 | ||