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).
Blueprint graph showing the results of fan tests on a 3 1/2 Litre Bentley, charting water temperature rise over time.
| Identifier | ExFiles\Box 86\5\ scan0005 | |
| Date | 9th September 1933 | |
| 3 1/2 LITRE BENTLEY FAN TESTS (CHASSIS 4 - B.IV) WATER TEMPERATURE RISE - LIGHT RUNNING - WATER AT 80°C AT COMMENCEMENT OF TEST N.B. ALL TEMPERATURE FIGURES REDUCED TO AIR TEMP OF 0°C. WATER TEMPERATURE RISE (DEGREES CENTIGRADE) TIME (MINS.) TOP CHART: 600 ENGINE R.P.M. BOILING BOTTOM CHART: 400 ENGINE R.P.M. LEGEND: PEREGRINE FAN 20/25 H.P. FAN CHRYSLER FAN NO FAN CHRYSLER & 20/25 H.P. FANS FITTED WITH .50" CLEARANCE BETWEEN FAN BLADE & RADIATOR MATRIX. AT FANS NEAREST POINT TO RADIATOR. | ||