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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).
Instructions and results for a test on the effect of 20 HP dynamo end-play.

Identifier  ExFiles\Box 51\1\  Scan369
Date  11th April 1924
  
RR 228 (150 BKS) [SH57-29-8-20.] MP 224355

X.4383

ROLLS-ROYCE LTD.

INSTRUCTIONS.

To: EFC {E. Fowler Clarke - Electrical Engineer}
Order No. AC.10.
Customer's No. X 4383

Effect of 20 h.p. Dynamo End-play.

A 20 hp dynamo, F, which is standard except that it is set to the general specification of test, has been used for trials of the above.

The armature was first pushed as far towards the commutator end as the bearing would allow. Then, starting cold, a production test was carried out, the results being:-

O.C Volts at 600 rpm. 14.4 (as shunt 14.5)
Ampere output after 20 mins on load at 1450 rpm, 13.0
OC Volts taken immediately at 700 rpm 17.2

A washer of about .047" thickness was now put on the armature shaft at the commutator end, and the armature

(Contd)

Signed
This Sheet must be filed on completion of the work.
  
  


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