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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).
Two graphs showing oil consumption for a 40/50 HP Silver Ghost engine and heat generation in a Peregrine oil pump.

Identifier  ExFiles\Box 131\1\  scan0082
Date  8th February 1933 guessed
  
Top Graph:
HS{Lord Ernest Hives - Chair} 956
40/50 H.P. OIL CONSUMPTION AT CONSTANT SPEED
OF 2000 R.P.M. FOR VARYING OIL FLOW
THROUGH BEARINGS.
(SILVER GHOST)
Y-Axis: OIL CONSUMPTION PTS/HR
X-Axis: OIL DISCHARGE THROUGH BEARINGS PTS/MIN.

Bottom Graph:
Hs{Lord Ernest Hives - Chair} 957
HEAT GENERATED BY WORK DONE ON OIL.
Y-Axis: B.T.H. U'S TO OIL
X-Axis: OIL PR: LBS/□"
Data Box:
OIL FLOW 27LBS:/MIN:
ENGINE R.P.M. 4500
OIL TEMP: 60°C.
Label: PEREGRINE OIL PUMP.
  
  


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