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).
Graph comparing cylinder wear and reboring rates for different engine series and piston types.

Identifier  ExFiles\Box 132\4\  scan0133
Date  9th April 1938
  
SHOWING THE NUMBER OF BLOCKS FROM EACH SERIES AS A PERCENTAGE OF THE TOTAL NUMBER OF CYLINDER BLOCKS REBORED
20%
15%
10%
5%
0
A
B
C
D
E
F
G
H
SPLIT SKIRT PISTONS
AEROLITE PISTONS
AVERAGE MILEAGE BEFORE REBORE
33,700 MILES
AVERAGE MILEAGE BEFORE REBORE
25,800 MILES
.015
.010
.005
GRAPH SHOWING AVERAGE CYLINDER WEAR PER 30,000 MILES OF THE TOTAL NUMBER OF CYLINDER BLOCKS REBORED
9.4.38/GL{G. Linnett}
  
  


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