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).
Component breakages and failures at specific mileages.

Identifier  ExFiles\Box 71\4\  scan0094
Date  30th March 1925
  
R.R. 493A (50H) (D.B. 175 25-9-24) J.H.D.

EXPERIMENTAL REPORT.

Expl. No.

REF HS{Lord Ernest Hives - Chair}/AJL/LG30.3.25.

BREAKAGES.

Side steering tube spring F.{Mr Friese} 71401
One after 6,370 miles, one after 8,000 miles.

No. 6 piston head failed - after 5,220 miles.
Nos. 11 and 12 push rods broken owing to above.
No. 12 valve spring " " "
Rear exhaust manifold - after 9,500 miles.

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FRONT SPRING BREAKAGES.

Top leaf N.S.F. spring after 8,006 miles.
3rd. leaf from top N.S.F. " 8,006 "
6th. " " " O.S.F. " 8,006 "
7th. " " " O.S.F. " 8,006 "
Bottom leaf O.S.F. " 9,290 "
2nd. leaf from bottom O.S.F. " 9,290 "
5th. leaf from top N.S.F. " 9,290 "
Bottom leaf N.S.F. " 9,290 "
2nd. leaf from bottom N.S.F. " 9,290 "
Top leaf O.S.F. " 9,350 "

-------------------

3rd. step iron from front (off side) - twice.

contd :-
  
  


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