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).
Table recording the results from trials of a speed indicator tester.

Identifier  ExFiles\Box 33\5\  Scan081
Date  17th May 1926
  
TRIALS OF SPEED INDICATOR TESTER.
Date. | Approx. time period. | Time under 10 mins. for 3000 counter revs. (secs) | % fast. | Frequency.
8-4-26 | 2-0 to 2-10 | +1.6 | +.27 | 50.13
9-4-26 | 10-0 to 10-10 | +3.7 | +.62 | 50.31
9-4-26 | 3-0 to 3-10 | +1.8 | +.30 | 50.15
10-4-26 | 11-0 to 11-10 | +2.2 | +.27 | 50.13
14-4-26 | 10-0 to 10-10 | +3.0 | +.50 | 50.25
14-4-26 | 13-0 to 3-10 | +1.4 | +.23 | 50.11
15-4-26 | 11-0 to 11-10 | +1.7 | +.28 | 50.14
15-4-26 | 4-0 to 4-10 | +1.0 | +.14 | 50.08
16-4-26 | 12-0 to 12-10 | +1.1 | +.18 | 50.09
16-4-26 | 5-0 to 5-10 | +2.8 | +.47 | 50.23
17.5.26.
  
  


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