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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).
Issues with overweight and unsound steel castings for an exhaust nozzle and engine foot, proposing a revised design using forgings.

Identifier  ExFiles\Box 38\4\  Scan019
Date  15th May 1920
  
[Handwritten top center, underlined: X3486]

R8/G15.5.20.

To By.{R.W. Bailey - Chief Engineer} from R.{Sir Henry Royce}
Copy to C.J.
" " Bn.{W.O. Bentley / Mr Barrington}
" " Da.{Bernard Day - Chassis Design}
" " Oy.
" " Hs.{Lord Ernest Hives - Chair} [Handwritten next to Hs.{Lord Ernest Hives - Chair}: X.3486]

[Underlined: RE STEEL CASTINGS.] [Handwritten to the right, underlined: X.3481. X.4062]
[Handwritten below X.3486: X3419]

In confirmation of the discussion that took place here with regard to the above, the following conclusions were arrived at.

After examination of the specimens brought by Mr. Hives of the exhaust nozzle, of the cut-out flange, and of the engine feet, I had the impression that we should except no more castings from the present source, the reason being they are [underlined: ridiculously heavy] and very unsound, in addition probably the cost is prohibitive. The exhaust nozzle would result in breaking the silencer pipe.

I may add that the pieces were never intended to be the thickness that they have become, but it is useless to go into the history of the parts, and the following remedy was suggested. The engine foot was to be made of two simple forgings with a probabilitynof the flange part being a sheet metal pressing. An extra forging was added to the foot which carried the steering box.

MR. Day, who was also present, was asked to draw this from suggested design, and get models made for testing as quickly as possible. Wooden patterns should be put in hand at once, but before handing to the die sinkers they should have bronze castings made from them which could be subject to test on the bumping rig.

The engine foot is the only important piece for

Contd.
  
  


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