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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).
Instruction from Mr. Royce to test if a three-bladed radiator fan performs as well as a six-bladed one.

Identifier  WestWitteringFiles\C\May1919\  Scan43
Date  16th June 1919
  
To EH. from E.{Mr Elliott - Chief Engineer} (EH is struck through)
Copy to CD. (CD is struck through)
" " BN.{W.O. Bentley / Mr Barrington} (BN{W.O. Bentley / Mr Barrington} is struck through)
" " DA.{Bernard Day - Chassis Design}
" " EFC.
20 (handwritten in circle)
ORIGINAL (stamped)
E8/G5/6/19. 2
RE RADIATOR FANS. X.3438
In accordance with Mr. Royce's instructions, would you please make a test to see if the 40/50 H.P. radiator fan will do as well with three blades as with six.
It is contemplated using a three-bladed fan for the 20 H.P. chassis.
E.{Mr Elliott - Chief Engineer}
RECEIVED (stamped)
16 JUN 1919 (stamped)
  
  


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