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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).
Performance log for Rapson straight side cord tyres and deflector tubes.

Identifier  ExFiles\Box 39\1\  Scan060
Date  22th January 1924
  
32 X 4 1/2 RAPSON STRAIGHT SIDE CORD TYRES AND DEFLECTOR TUBES.

DATE. TYRE NO'S. WHERE FITTED. SPEEDOMETER READING. DAYS RUN. TOTAL MILES. REMARKS.
6.1.24 63146 O.S. rear 5,824 126 4,117 Pressure :-
63253 N.S. rear Front - 35 lbs.
63141 O.S. front Rear - 40 "
63124 N.S. front

7.1.24 " " 5,920 96 4,213

8.1.24 " " 6,014 94 4,307

9.1.24 " " 6,054 40 4,347

10.1.24 " " 6,409 355 4,702
13.1.24

14.1.24 " " 6,544 135 4,837

15.1.24 " " 6,620 76 4,913

16.1.24 " " 6,716 96 5,009

17.1.24 " " 6,736 30 5,039

18.1.24 " " 6,871 135 5,174

19.1.24 " " 7052 182 5,355
20.1.24
  
  


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