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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).
Bar chart detailing the gain or loss in lap speed under different aerodynamic and mechanical configurations for the 10 E.X. model.

Identifier  ExFiles\Box 29\3\  Scan166
Date  7th September 1927
  
STANDARD CONDITION
HOOD DOWN. C.O. OPEN
TAIL UNDERSHIELD
AND WINGS ON M.P.
TYRES AND LOUVRED BONNET

GAIN OR LOSS IN LAP SPEED M.P.H.
OVER STANDARD CONDITION

CHART DATA:
C.O. CLOSED: Loss 3.25
HOOD UP: Loss 1.50
PLAIN BONNET: Loss 1.00
UNDERSHIELD OFF: Loss .50
TAIL OFF: Loss .94
BALLOON TYRES: Loss .82
FRONT WINGS OFF: Gain 1.00

EFFECT OF VARIOUS CONDITIONS ON THE SPEED
OF 10 E.X.

STAMP:
ROLLS-ROYCE. LIMITED
PRINT ROOM
7 SEP 1927
  
  


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