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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).
Test results page showing endurance test observations and primary volt/ampere-speed curves.

Identifier  ExFiles\Box 48\3\  Scan082
Date  11th August 1926
  
R.R. E.S.S. /100 T/ (S.H 139. 11-8-26) G 2800

-3- Contd.

(7)h Endurance test :-
Slight signs of tracking, and marks on segments which appear to have been due to small arcs. Platinum points slightly blackened. Light deposit of grey dust on H.T. ring insulating cheeks, and collector brush holder.

(8) O.C. Primary volt-speed curve.

Speed. Volts. Volts/Speed.
400 2.67 .00668
800 5.23 .00654
1200 7.46 .00621
1600 9.63 .00602
2000 11.64 .00582
2400 13.53 .00564
2800 16.00 .00571
3200 18.00 .00563
3400 19.00 .00559

(9) O.C. primary ampere-speed curve.

Speed. Amperes. Speed. Amperes.
100 .85 1200 3.45
200 1.60 1600 3.59
300 2.15 2000 3.63
400 2.55 2400 3.69
600 3.00 2800 3.70
800 3.23 3200 3.75
1000 3.39 3400 3.75

Contd.
  
  


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