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).
Table comparing radiator performance and specifications under various bonnet ventilation and fan configurations.

Identifier  WestWitteringFiles\U\August1930-November1930\  Scan020
Date  28th February 1921 guessed
  
Top Table:
| Condition of Bonnet vent-ilation 19-EX | Sq. tube rad. All out Std. Fan. belt Choc-o-bloc | Sq. tube rad. All out Altered fan belt Choc-o-bloc. | Sq. tube rad. 75 M.P.H. Std. Fan Belt Choc-o-bloc. | Sq. tube rad. 60 M.P.H. Std. Fan Choc-o-bloc. | Sq. tube rad. 50 MPH. Altered Fan. |
| --- | --- | --- | --- | --- | --- |
| Shutters closed. | | | 85°C. (79°C.) | 81°C. (74°C.) | |
| Shutters open. | | 83°C. (75°C.) | 81°C. (74.2) | 77°C. (69.2°C) | |
| Louvred bonnet. | 80°C. (72.5) | 78°C. (71°C.) | 78°C. (71.3) | 72°C. (66) | 69° (63.0) |

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

Bottom Table:
| | Square tube radiator. | Standard 6 mm. 7 1/2 mm. round tube. |
| --- | --- | --- |
| Weight of matrix empty. | 132 lbs. | 129 lbs. |
| Weight of matrix full. | 173.25 lbs. | 174.5 lbs. |
| Qty. of water in matrix. | 4.125 galls. | 4.55 galls. |
  
  


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