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).
Case of a valve spring breaking during a Unit Test.

Identifier  ExFiles\Box 17\6\  Scan049
Date  9th July 1928
  
X7060
Bys
c Hs{Lord Ernest Hives - Chair}
Mx{John H Maddocks - Chief Proving Officer}/McM12/T9.7.28.
re Valve Springs F.2.B.
Further to our Mx{John H Maddocks - Chief Proving Officer}/McM3/T28.6.28, we have another case of a valve spring breaking during Unit Test - at 2750 r.p.m. We are sending the broken spring to By with this memo.
Mx{John H Maddocks - Chief Proving Officer}/McM
  
  


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