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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).
Design of 'Spectre' pistons, proposing to base them on the existing 'Phantom' and '20/25' models for safety reasons.

Identifier  ExFiles\Box 94\5\  scan0096
Date  19th July 1935
  
To E.{Mr Elliott - Chief Engineer}
X336
Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}2/KW.19.7.35

SpectreCodename for Phantom III Pistons.

We think that as a safety-first measure we ought to design and make a SpectreCodename for Phantom III piston to exactly the same scheme as the present Phantom and 20/25 pistons.

Mx.{John H Maddocks - Chief Proving Officer} reports so little trouble with these now that it seems foolish to start the car in production with anything else. In the meantime, our tests on semi-split pistons, etc., are going ahead.

Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}
  
  


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