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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).
Excessive end load on the second gear sliding piece of a 28-EX gearbox.

Identifier  ExFiles\Box 15\5\  Scan393
Date  6th July 1934
  
To RHC.{R. H. Coverley - Production Engineer}

X7310

Ha/Gry.{Shadwell Grylls}16/KW.6.7.34.

28-EX. Gearbox.

On examining the parts of this gearbox it is evident that the end load required to slide the second gear sliding piece is much greater than the top and third pieces.

We should like it re-erected so that the load to push the plungers out of the groove towards second gear is the same as for top and third.

We think when you have arranged this that the friction of the plungers on the plainer part of the bore will be considerably more in the second gear than in top or third. We shall be glad if you can find out why this is and if possible correct it.

Hdy{William Hardy}: is instructing bronze spherical bushes for the bearings of the lower second speed slider.

Ha/Gry.{Shadwell Grylls}
  
  


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