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 illustrating water circulation flow rates in a complete water system against engine RPM.
| Identifier | ExFiles\Box 24\5\ Scan149 | |
| Date | 23th January 1928 guessed | |
| CIRCULATION IN COMPLETE R R WATER SYSTEM WATER FLOW GALS/MIN 10 20 30 40 STANDARD FLOW MINIMUM EFFICIENT FLOW TYPICAL FLOW OF OBSTRUCTED RADIATOR ENGINE R.P.M 500 1000 1500 2000 2500 3000 | ||