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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).
Use of solid eye versus rolled eye road springs and their impact on cost and frame design.

Identifier  ExFiles\Box 17\1\  Scan069
Date  15th October 1931
  
X7410

BY.{R.W. Bailey - Chief Engineer} FROM DA.{Bernard Day - Chassis Design}

DA{Bernard Day - Chassis Design}1/M15.10.31.

Copy to HS.{Lord Ernest Hives - Chair}
BY/HEB.{H. Biraben}

ROAD SPRINGS.

X.5410.
X.7410.

Referring to BY/G12.10.31. we had the impression that one solid eye was not regarded as a great disadvantage, and had the effect of causing the spring centres to be rather more accurate than when both were rolled. Apart from this however the solid eye fits into the new deep frame more conveniently than does the rolled eye. We should therefore like to have your further comments namely, some idea as to the increased cost due to using one solid eye.

If the matter is very important we would have another go at the spring ends but it is evident that either the negative camber of the rear spring must be increased - which we should be reluctant to do - or the frame depth must be reduced.

As regards the front springs we could probably do something by re-setting the frame.

As regards the clips we think that if these stand up on the experimental springs we shall have no objection to using them.

DA.{Bernard Day - Chassis Design}
  
  


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