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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 40/50 Switch-box test.

Identifier  ExFiles\Box 61b\3\  scan0320
Date  5th January 1932
  
X6070.
X.No.
Item No. T.S A1
ELECTRICAL EXPERIMENTAL RECORD SHEET.
Description of item :- 40/50 Switch-box. 7-R charge. Full output S&T. Arm. breaks first.
Date on.
Location.
REMARKS.
Miles reading start.
Miles covered.
Total miles.
25-5-31
25 Ex
First of type standardized for N2 series. with 23" resistance.
12,712
30-9-31
"
Reading taken.
35,556
22,844
22,844
4-11-31
"
"
36,463
907
23,751
18-12-31
"
"
37,357
894
24,645
5-1-32
"
"
38,564
1,204
25,849
Test completed.
  
  


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