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 of trials for a speed indicator tester.

Identifier  ExFiles\Box 33\5\  Scan080
Date  25th February 1925
  
TRIALS OF SPEED INDICATOR TESTER.
4

Date. Approx. time Period. Time under 10 mins. for 3000 counter revs. (secs.) % Fast. Frequency

19.3.26. 11.35 to 11.45 -.8 -.13 49.93
" 3.15 to 3.25 -.2 -.03 49.98
" 4.10 to 4.20 + 4.0 + .67 50.34
22.3.26. 10.50 to 11.0 + 3.4 + .57 50.29
" 11.10 to 11.20 + 1.2 + .20 50.10
" 3.45 to 3.55 + 1.4 + .23 50.12
" 4.30 to 4.40 + 3.3 + .55 50.28
23.3.26. 9.0 to 9.10 - .6 - .10 49.95
24.3.26. 11.5 to 11.15 + .2 + .33 50.16
" 12.0 to 12.10 + 1.0 + .17 50.90
29.3.26. 11.10 to 11.20 -3.3 - .55 49.73
" 11.25 to 11.35 +4.6 .77 50.38
" 11.40 to 11.50 +1.4 .23 50.11
" 12.30 to 12.40 + .50 .083 50.04
30.3.26. 9.45 to 9.55 +1.9 .32 50.16
" 10.5 to 10.15 +2.9 .48 50.24
" 4.45 to 4.55 +1.0 .17 50.80
31.3.26. 9.5 to 9.15 -.50 -.083 49.96
" 2.40 to 2.50 +.80 .13 50.60
" 4.10 to 4.20 Correct. .0 .0

25.2.25.
  
  


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