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).
Log sheet detailing the results from trials of a speed indicator tester.

Identifier  ExFiles\Box 33\5\  Scan084
Date  17th May 1926
  
TRIALS OF SPEED INDICATOR TESTER.
Date. | Approx. time period. | Time under 10 mins. for 3000 counter revs. (secs). | % fast. | Frequency.
10-5-26 | 11-55 to 12-5 | + 1.5 | +.25 | 50.12
10-5-26 | 3-25 to 3-35 | + 3.0 | +.50 | 50.25
11-5-26 | 10-45 to 10-55 | + 2.0 | +.33 | 50.16
11-5-26 | 11-30 to 11-40 | + 2.1 | +.35 | 50.17
11-5-26 | 12-30 to 12-40 | + 2.1 | +.35 | 50.17
11-5-26 | 4-50 to 5-0 | + 1.5 | +.25 | 50.12
12-5-26 | 10-0 to 10-10 | + 2.6 | +.43 | 50.22
12-5-26 | 12-25 to 12-35 | + 1.2 | +.20 | 50.10
13-5-26 | 9-20 to 9-30 | Correct | Correct | Correct
14-5-26 | 3-20 to 3-30 | Correct | Correct | Correct
17.5.26.
  
  


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