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).
Photograph of Hall's metal main bearings from a B-16 unit after an endurance test.

Identifier  ExFiles\Box 82\4\  scan0162
Date  21th September 1935 guessed
  
UPPER HALVES
โ† 1 to 7 โ†’
B-16 Unit. 6.8:1 comp.ratio.
Hall's metal main bearings after 42 hrs.30 mins. endurance as follows:-
1st 30 hrs. at 4,000 r.p.m. full throttle.
Following 12½ hrs. as follows for each hour:-
30 mins. at 4,000 r.p.m. full throttle.
25 mins. at 4,250 full throttle.
5 mins. at 4,500 full throttle.
  
  


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