Rolls-Royce Archives
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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).
Indicator diagram showing piston displacement for crank angles of a Hispano engine cylinder.

Identifier  ExFiles\Box 22\1\  Scan140
Date  12th March 1924 guessed
  
6.2
Spring Used-Rating 91.5
Diagram Area 103 □"
Engine HISPANO
Cyl. No. 6
Air Temp. 12°C
Bar Temp. 765 m/m
Cooling Water Temp. 80°C
R.P.M. 2500
Lbs. Lift 108
H.P. 112.8
I.M.E.P. 118 LBS/□"
B.M.E.P. 88.2 LBS/□"
Max. Expln. Pr.{Percy H. Rose} 350
Av. Expln. Pr.{Percy H. Rose} 344
Mechanical Efficiency 74.5%
Indicated Vol. Efficiency 88%
DOTTED LINE SPRING RATING 6.2 LBS/□"
FULL LINE 1" = 91.5 LBS/□"
DOTTED LINE 1" = 6.2 LBS/□"
E.C.
T.D.C.
IGNITION
ATMOS LINE
I.C. E.O.
PISTON DISPLACEMENT FOR CRANK ANGLES.
  
  


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