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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).
Bedding of Spectre No. 2 pistons and requesting a modification for Spectre No. 5 pistons.

Identifier  ExFiles\Box 94\5\  scan0093
Date  13th March 1935
  
To RHC.{R. H. Coverley - Production Engineer}
+356
Hs{Lord Ernest Hives - Chair}/Mths.{Reg Matthews}11/KW.13.3.35.

SpectreCodename for Phantom III No: 2 Pistons.

We should like the pistons B.V.42 recently removed from SpectreCodename for Phantom III No. 2 unit measured as the bedding of these pistons varies considerably.

The particular pistons we are interested in are :-

No. 4 A which shows a fairly good bedding.
No. 5 B which shows a very narrow bedding.
No. 5 A which shows a bedding to one side of centre line of piston on the pressure side.

If the set of B.V. 42 pistons ordered for SpectreCodename for Phantom III No. 5 Unit have not reached grinding, we should like them held up at grinding stage as we wish to make a modification since seeing the pistons out of No. 2 unit.

Hs{Lord Ernest Hives - Chair}/Mths{Reg Matthews}:
  
  


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