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 cooling matrix performance with varying heights and depths at a road speed of 30 mph.

Identifier  ExFiles\Box 24\4\  Scan304
Date  25th November 1924 guessed
  
SHEET 1.

VALUE OF INCREASING MATRIX HEIGHT
ALSO REDUCING DEPTH.

No ventilation. Matrix details. | Sθ | % difference from 'A'. | Critical atmospheric temperature.
STANDARD.
Matrix height 20¾"
Depth 4.8". | 77°C | 'A' | 18°C
LARGE STANDARD.
Matrix height 21¾"
Depth 4.8". | 74.5°C | 3.3% Improvement. | 20.5°C
EAC. TUBES.
Matrix height 21¾"
Depth 4.4". | 77.5°C | .65% Improvement. | 17.5°C
Matrix height 22¾".
Depth 4.8". | 70°C | 9% Improvement. | 25°C
Matrix height 23¾"
Depth 4.8". | 68.5°C | 11% Improvement, | 26.5°C

Figures for road speed of 30 m.p.h.
  
  


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