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 plotting engine revolutions per minute against vehicle speed in miles per hour.

Identifier  Morton\M7\  img063
Date  5th May 1921
  
SION.
REVS: PER MIN.
2000
2250
MILES PER HOUR.
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
0
ROLLS-ROYCE LIMITED
-5 MAY 1921
  
  


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