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).
Test report logging the operational lives and failure times of various components like levers, shafts, and casings.

Identifier  ExFiles\Box 16\7\  Scan136
Date  1st January 1929 guessed
  
contd :- -2-

INSIDE LEVERS.

Several of these broke - their lives were :-

With 8 restrictions :

N.S. F.79313. O.S. F.79314.
6 hrs. 30 mins. 6 hrs. 30 mins.
1 hr. 15 mins. 1 hr. 15 mins.

With 5 restriction washers.

9 hrs. 15 mins. 9 hrs. 0 mins.

I. section inside levers were fitted and ran remaining 21 hrs. 30 mins. with 5 restriction washers without failing.

MAIN SHAFT.

When stronger inside levers were fitted, these broke after :-

N.S. F.79311. O.S. F.79312.
8 hrs. 45 mins. 14 hrs. 15 mins.

CASINGS.

The original aluminium casings (having run with 8 restrictions) broke after :-

N.S. O.S.
22 hrs. 10 mins. 22 hrs. 25 mins.

Aluminium bronze casings were fitted after 70 hrs. 15 mins. and ran with 5 restrictions for 41 hrs. 30 mins. longer, surviving many other broken parts. (Still unbroken)

OUTSIDE LEVERS. F.79317 - broke after running 64 hrs. 10 mins.(N.S.) failed after 100 hrs. were completed. A second one broke after running 66hrs. 10 mins. (O.S.)
contd :-
  
  


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