Rolls-Royce Archives
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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 chart showing the daily error of Smith Motor Type Electric Clocks on car 9 B V over approximately 65 days.

Identifier  ExFiles\Box 164\1\  img256
Date  6th January 1941 guessed
  
SMITH MOTOR TYPE ELECTRIC CLOCKS
ON CAR 9 B V
MINS ERROR PER DAY
DAYS
440 MILES RUN DAY
VOLTS LOW STANDING
BATT CHARGED
270 MILES
8K RUNNING
217 MILES
12.2V STANDING
RUNNING 500 MILES RUN DAY & NIGHT
VOLTS NOT OVER 11.9V
CAR RUNNING BATT VOLTS LOW
STANDING
IN SHOP OFTEN
11.6V STANDING
1 DAY
192 MILES
RUNNING DAY
INSP. LAMP USED FOR SOME HOURS
42 MILES
150 MILES
DAY & NIGHT
RUNNING DAY & NIGHT
190 MILES
DAY & NIGHT
RUNNING NIGHT & DAY
95 MILES
VOLTS LOW STANDING
VOLTS NOT ABOVE 12 WHILE STANDING AFTER THIS DATE
VOLTS ARE JUST OVER 13 NIGHT AND ABOUT 15.5 DAY RUNNING
  
  


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