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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).
Series of four graphs analysing oil pressure, velocity, viscosity, and temperature under different conditions.

Identifier  ExFiles\Box 16\7\  Scan034
Date  16th November 1927 guessed
  
FIG. B

GRAPH I
OIL PRESS. LBS. SQ."
AXLE VEL. 3FT/SEC
A
B
C
PRESS L.P. VALVE OPENS
COMPRESSOR OIL 20°C
2" STROKE INS. 120 R.P.M.
INCREASE IN VELOCITY PRESSURE FACTOR
DUE TO VARIOUS SPACING OF ORIFICES
NOTE L.P. VALVE DOES NOT OPEN FOR SLOW 2" STROKES

GRAPH II
OIL PRESS. LBS. SQ."
FRONT AXLE VEL. FT/SEC.
COMPRESSOR OIL USED AT 20°C
C
2" STROKE
4" STROKE
6" STROKE
SHOWS MAX. PRESS. ATTAINED DOES NOT VARY VERY MUCH WHETHER PRODUCED BY LONG SLOW STROKES OR BY SHORT QUICK ONES GIVING SAME AXLE VELOCITY.

GRAPH III
OIL PRESS. LBS. SQ."
OIL TEMP. C°
AXLE VEL. 7.8 FT/SEC
A DROP 15%
COMPRESSOR OIL
C DROP 10%
DROP IN VELOCITY PRESSURE INCREASE FACTOR
DUE TO FALL IN OIL VISCOSITY.
PRICES MOTORINE C° TRIED ALSO AT 15°C
WITH NO FURTHER PRESS. RISE.

GRAPH IV
OIL TEMP. C°
TIME OF EFFLUX SECS
VISCOSITY CURVES
PRICES MOTORINE
COMPRESSOR OIL

.180
.098
.125
.250
.100
.450
ACTUAL DIMENSIONS OF RESTRICTION A WASHERS &
DISTANCE PIECES RE-ARRANGED FOR B & C.
  
  


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