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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).
Electrical experimental record sheet for a 20/25 Switchbox.

Identifier  ExFiles\Box 166\8\  img010
Date  24th November 1931
  
X. No. X6067
Item No.
ELECTRICAL EXPERIMENTAL RECORD SHEET.
Description of item :- 20/25 Switchbox - T-R S+T cum first. 2J resistance
Date on | Location | REMARKS | Miles reading start | Miles Covered. | Total Miles.
29-6-31 | 19 G | Put on 19 G for 10,000 miles test, with 2J resistance. | 489 | - | -
24-11-31 | " | No complaints. Quite O.K. throughout run. C.A.P. 24-11-31 | 20,204 | 19,715 | 19,715
  
  


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