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 pump performance with three different radiator types against engine RPM.
| Identifier | ExFiles\Box 105\1\ scan0140 | |
| Date | 19th August 1931 | |
| V1142, DELIVERY GALLS/MIN, 50, 40, 30, 20, 10, RADIATOR WITH 268 HEXAGON TUBES, STD RAD WITH 4 DENTS IN EACH TUBE, SQUARE TUBE RADIATOR, SUCTION SIDE PUMP, ENGINE RPM, 500, 1000, 1500, 2000, 2500, 3000, SUCTION SIDE PUMP, PRESS lbs/sq in, DEPN lbs/sq in, 5, 0, 5, 19-8-31, Rbt. | ||