Rolls-Royce Archives
         « Prev  Box Series  Next »        

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).
Comparative analysis of cooling performance between Hispano and 40/50 fans and systems.

Identifier  ExFiles\Box 24\4\  Scan306
Date  25th November 1924 guessed
  
SHEET 3.

RELATIVE VALUE OF HISPANO AND 40/50 FANS.
30 M.P.H.

CAR DETAILS. S°C % difference from 'A&A'. Critical ats. temperature.
40/50 HP. 20 1/4" matrix. Louvres. 70.5°C 'A' 24.5°C
Ditto - no Fan. 91.5°C 30% worse. 3.5°C
Hispano - louvred bonnet. 60.7°C 'A' 34.3°C
" " - No fan. 66.8°C 10% worse. 28.2°C

RELATIVE EFFICIENCY OF HISPANO AND 40/50
COOLING SYSTEMS.

40/50 HP. 21 1/4" matrix. Louvres - 30 M.P.H. 68.2°C 'A' 26.8°C
Ditto - 20 M.P.H. 73.6°C 8% worse 21.4°C
Hispano - Louvres. 30 M.P.H. 60.7°C 11% better. 34.3°C
Ditto - 20 M.P.H. 61.2°E 10.2% better. 33.6°C
  
  


Copyright Sustain 2025, All Rights Reserved.    whatever is rightly done, however humble, is noble
An unhandled error has occurred. Reload 🗙