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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).
Inquiry to The Automotive Engineering Co. Ltd. about the weight of BHB pistons for a 40/50 HP car.

Identifier  ExFiles\Box 148\3\  scan0052
Date  16th October 1928
  
X1506
+8040

Hs{Lord Ernest Hives - Chair}/Rn{Mr Robinson}4/LG.

Expl: Dept:
16th. Oct. 1928.

Messrs. The Automotive Engineering Co.Ltd.,
104, The Green,
Twickenham.

Dear Sirs,

For the attention of H.S.Hewitt Esq.,

RE. BHB. PISTONS.

With reference to our conversation in Paris last week.

We should be interested to know what the weight of one of your pistons for our 40/50 HP. car would be.

As you are probably aware, the cyl. bore is 4½", the gudgeon pin is 2.6" from the upper surface of the piston, which is flat.

We are merely interested to know, judging from other pistons you have made, what weight you consider your type of piston would be.

Yours faithfully,
  
  


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