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 showing pump RPM versus pressure depression on the suction side for a Phantom II radiator.
| Identifier | WestWitteringFiles\U\January1930-April1930\ Scan033 | |
| Date | 10th January 1930 | |
| DEPRESSION SUCTION SIDE OF PUMP INS HG PUMP R.P.M. PHANTOM II RADIATOR 5000 MILES 1 M.M. GAP BETWEEN TUBES 1000 2000 3000 0 2 4 6 8 10 12 90°C 80°C ROLLS-ROYCE LTD PRINT RECEIVED 10 JAN 1930 DERBY | ||