Rolls-Royce Archives
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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).
Test results for a standard radiator comparing performance based on bonnet ventilation, fan type, and speed.

Identifier  ExFiles\Box 29\3\  Scan269
Date  1st September 1930 guessed
  
STANDARD RADIATOR 6/7 1/4 mm. TUBES.

| Condition of bonnet ventilation 19-EX. | Std. Fan Belt Solid. All out 80 M.P.H. | Altered Fan Solid. All out 80 MPH. | Std. Fan Belt Solid 75 MPH. | Std. Fan Belt Solid 60 MPH |
|---|---|---|---|---|
| Shutters closed. | 88º C. (75º C) | | 84.5 | 78.5 |
| Shutters open. | 80º C. (71.8º C.) | 79º C. (69º C.) | 78º | 73º C. |
| Louvred bonnet. | 77º C. (67º C.) | 75º C. 151 (66.3º C) | | |

Atmospheric temperature 20º C.
Figures in brackets, bottom water temperature
  
  


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