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).
Bar chart comparing the cooling efficiencies of E.A.C. and 40/50 models at 30 and 40 MPH.
| Identifier | ExFiles\Box 66a\3\ scan0122 | |
| Date | 26th March 1925 | |
| COMPARISON OF COOLING EFFICIENCIES E.A.C AND 40/50. CRITICAL Ats TEMPERATURE. CENTIGRADE DEGREES. 0° 10° 20° 30° 40° COMPARISON 40/50 AND E.A.C. 30 M.P.H. 40/50 2 1/4" MATRIX. E.A.C. 'V' SERIES. COMPARISON 40/50 AND E.A.C. 40 M.P.H. 40/50 2 1/4" MATRIX. E.A.C. 'V' SERIES. CRITICAL Ats TEMP IS Ats TEMP ABOVE WHICH IT WILL BE POSSIBLE TO MAKE THE CAR BOIL IF DRIVEN FOR SUFFICIENTLY LONG FULL THROTTLE TOP GEAR AT THE SPECIFIED SPEED. 26/3/25 | ||