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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).
Letter from Wellworthy Piston Rings Ltd. discussing the manufacture of a piston head, experiences with Diesel pistons, and a query about aluminium bearing material.

Identifier  ExFiles\Box 115\5\  scan0249
Date  15th February 1939
  
Peleine 1020a.

WELLWORTHY PISTON RINGS LTD.,
LYMINGTON
HANTS

WORKS TELEPHONE LYMINGTON 520
WORKS TELEGRAMS "WELLWORTHY"
PRIVATE TELEPHONE LYMINGTON 232

MANAGING DIRECTOR'S OFFICE

JH/CJR. 15th February, 1939.

W. A.{Mr Adams} Robotham Esq.,
Messrs. Rolls-Royce, Ltd.,
Derby.

Dear Robotham,

Thanks very much for yours of February 10th.
As Piston manufacturers we are terribly interested in what you have to tell us about the possibilities of a Piston head which will give 8-1 compression ratio, and if there is any possibility of our taking it up and manufacturing it for the trade for you on a royalty basis, we shall be very pleased indeed to go into it with you.

Can I leave the matter in your hands, or can I get in touch with Mr. Hives or Mr. Wilson about it. I understand Mr. Blackith is visiting you tomorrow, Thursday 16th, and if there is anything we can do to co-operate with you in this matter, we shall be most happy to do so.

There is, however, one point that I should like you to chat over with Mr. Blackith, and that is this: with our experience of certain Pistons which we are making for the Diesel people, where they have formed the head of the piston into a sort of pre-combustion chamber or something on these lines, although of course you may have something entirely different, there has been a tendency for this to create excessive cylinder wear owing to the fact that when the projection came out of the chamber there seemed to be a violent swirl with the gasses, which set up cylinder wear at that particular point.

However, perhaps if you could chat it over with Mr. Blackith for a few moments it would be very helpful.

By the way, I understand that Stones of Deptford are supplying an aluminium bearing material. Do you know anything regarding it?

Yours sincerely,
J.{Mr Johnson W.M.} Howlett
  
  


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