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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).
Torque test results for an R.R. Goshawk motor at 1500 r.p.m.

Identifier  ExFiles\Box 35\4\  scan 096
Date  1st February 1922
  
MOTOR FORM 3.
TORQUE TEST OF MOTOR
(at given speed);
Date: - 1.2.22
Motor under test: - R.R. Goshawk
Speed 1500 r.p.m.
No: - 1
Reduction gear ratio:-
Weight of pan and portion of rope: - 5 lbs. 0 ozs.

Table Data:
Load in pan (lbs) (W). | Spring balance reading (S) lbs. ozs. | Amperes. | Field volts. | Arm: volts. | Total volts. | Field ohms. | Arm: ohms. | Total ohms. | W-S (lbs) | T-t (lbs) | Torque lb-ins
7 | 1 12 | 124.0 | .850 | 12.73 | 13.58 | .00685 | | | 5 4 | 10.25 | 51.25
6 | 1 9 | 115.0 | .790 | 12.30 | 13.09 | .00687 | | | 4 7 | 9.44 | 47.20
5 | 1 7 | 110.5 | .750 | 11.90 | 12.65 | .00679 | | | 3 9 | 8.56 | 42.80
4 | 1 7 | 99.0 | .660 | 11.30 | 11.96 | .00667 | | | 2 9 | 7.56 | 37.80
3 | 1 10 | 88.5 | .571 | 10.70 | 11.27 | .00646 | | | 1 6 | 6.38 | 31.90
2 | 1 9 | 78.8 | .512 | 10.33 | 10.84 | .00650 | | | 7 | 5.44 | 27.20
1 | 1 4 | 72.3 | .475 | 9.83 | 10.31 | .00658 | | | -4 | 4.75 | 23.75
0 | 1 3 | 62.5 | .416 | 9.05 | 9.47 | .00666 | | | -1 3 | 3.81 | 19.05
0 | 0 | 13.5 | .090 | 2.75 | 2.84 | .00666 | | | 0 0 | 0 | 0
  
  


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