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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).
Chart showing the volatility curves for various motor fuels.

Identifier  ExFiles\Box 32\1\  Scan043
Date  27th March 1917
  
The Motor
170
27th March, 1917.
VOLATILITY OF MOTOR FUELS.
DEGREES CENT. FAH.
182 360
171 340
160 320
148 300
138 280
127 260
116 240
104 220
93 200
82 180
71 160
60 140
49 120
PER CENT.
CURVE LABELS:
PARAFFIN .814
PARAFFIN .802
INFERIOR SUBSTITUTE .784
BEST SUBSTITUTE .772
PARAFFIN (.814) AND MEX (.715) MIXTURE (equal parts)
CARBUS .737
CROWN .740
REDLINE II .725
PRATT I .720
CARLESS I .699
To avoid unnecessary complication several curves are omitted. For practical purposes, however, the curve for "Pratt I" also represents "Carburine I." The curve "Redline II" represents "Carburine II," "Mex," "Redline I," and "Shell I." Similarly, the curve for "Crown" represents "Shell II," "Pratt II," "Carburine III," and "Taxibus."
B12
X 530
  
  


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