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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).
Proposing an accelerated test method on a friction rig to evaluate materials for cylinder bore wear.

Identifier  ExFiles\Box 132\4\  scan0163
Date  19th August 1938
  
1124

To Hl. (Lab).
c. to By.{R.W. Bailey - Chief Engineer}

Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation}12/JH.19.8.38.

CYLINDER BORE WEAR.

To obtain reliable results, in connection with the comparisons of materials in relation to their individual effects on cylinder bore wear, has of necessity, up to the present time been an extremely long process. This is due to the fact that our tests are carried out on main engines, and it naturally takes time to pile up sufficient mileage of running time to produce the necessary wear for comparative results.

We recently discussed with you the possibility of accelerating this wear factor, and the following possibility arrises. If this is practical, we would appreciate your cooperation.

The suggestion is, to carry out a test on your friction test rig, on which you have previously developed bearing alloy.

We are obtaining from the Iron Foundry, cylinder liners in various materials, these are described in full, in a memo. from Mr. Vickers - RHC{R. H. Coverley - Production Engineer}/VS.{J. Vickers}1/JJ.9.8.38.

Our suggestion would be, to supply you with test pieces, in the form of flat plates, of the same materials, as laid down in the above memo. and having the same surface finish as do the finished cylinder liners.

Further we would obtain the rubbing pads for your machine, made up in standard piston ring material.

The results which we would hope for in this test, is that you could lay down the various test pieces, in their order of merit re wear resistance.

We would like your comments on the possibilities of this test, so that if practical we could go ahead with the necessary instructions for test purposes.

Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation}
  
  


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