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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).
Comparison of specification figures for Motorine R. and B.P. Castor Oil.

Identifier  ExFiles\Box 27\1\  Scan184
Date  22th April 1929
  
COPY.

(2)

H.{Arthur M. Hanbury - Head Complaints} Royce Esq. 22nd April, 1929.

SPECIFICATION FIGURES.
--------------------

MOTORINE R.{Sir Henry Royce} B. P. CASTOR OIL.

Specific Gravity .955/60 .960
Viscosity @ 70°F.{Mr Friese} 3448" 3640"
" @ 140°F.{Mr Friese} 305" 330"
" @ 200°F.{Mr Friese} 88" 96"
Flash Point 400/50°F.{Mr Friese} 450°F.{Mr Friese}
Setting Point -5°F.{Mr Friese} -5°F.{Mr Friese}

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