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).
Summary of radiator test results under various fan and cowling configurations.
| Identifier | ExFiles\Box 155\1\ scan0257 | |
| Date | 5th September 1936 guessed | |
| SUMMARY OF RADIATOR TEST RESULTS. TEST CONDITIONS. Air temp. Fan used. Pulley Ratio. Cowlings used. Other Details. To boil - °C. (1) Standard fan. Std. Front and rear. Std. bonnet. (a) 40 M.P.H 21.5 (b) Full Speed 20.0 (2) " " " Front only. " " (a) 25.0 (b) 24.0 (3) " " " no cowls. " " (a) 23.0 (b) 24.0 (4) Copy of rigid Cad. (4 blades) fan. " " " (a) 27.5 (b) 26.0 (5) " " " High speed. Front and rear " (a) 36.0 (b) 23 - belt slip. (6) Cadillac rigid fan (8 blades) Std. no cowls. " (a) 28.5 (b) 26.5 (7) " " " Std. bonnet & wire mesh grills (a) 26.0 (b) 25.0 (8) " " " Nobl. Bonnet. (a) 32.0 (b) 30.5 (9) " " " front cowl " (a) 25.5 (b) 26.0 Note:- All tests without shutters fitted. Full sped tests approx. 88 M.P.H. | ||