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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 graphs showing performance variations with oil temperature and reduced diameter restrictions.

Identifier  WestWitteringFiles\S\June1928-August1928\  Scan044
Date  28th June 1928 guessed
  
PLAIN REDUCED DIA: RESTRICTIONS. VARIATION WITH OIL TEMP:

Top Left Graph:
L.P.
55/60 LB. LOADS
13" LEVER
H.P. PORT .187" DIA: L.P. .098" DIA
200 R.P.M. 11" STROKE.
1" = 332 LB/□"
20°C
60°C
SLOW RUNNING.

Top Right Graph:
H.P.
55/60 LB. LOADS
13" LEVER.
H.P. PORT .187" DIA: L.P. .098" DIA
200 R.P.M. 11" STROKE.
1" = 332 LB/□"
20°C
59°C
SLOW RUNNING.

Bottom Graphs Section:

First Bottom Graph:
55/60 LB LOADS .187" DIA: H.P. .098" DIA:
L.P. PORTS 200 R.P.M. 7" STROKE.
L.P.
1" = 332 LB/□"
23°C
61°C
S.R.

Second Bottom Graph:
55/60 LB LOADS - 13" LEVER - .187" DIA: H.P.
L.P. PORTS .098" DIA: 200 R.P.M. 7" STROKE.
H.P.
1" = 332 LB/□"
17°C
60°C
S.R.

Third Bottom Graph Area:
55/60 LB. LOADS - 13" LEVER - .187" DIA: H.P.
L.P. PORTS .098" DIA: 200 R.P.M. 3.7" STROKE.
LOW PRESSURE.
HIGH PRESSURE.
1" = 332 LB/□"
Left mini-graph: 18°C, 61°C, S.R.
Right mini-graph: 17°C, 60°C, S.R.

Bottom Title:
STANDARD DAMPER BUT WITH LOW PRESS. PASSAGES DRILLED .098" HIGH PRESSURE PASSAGE .187"
  
  


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