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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).
Modifications to the Peregrine cylinder head spark plug positions and related components.

Identifier  ExFiles\Box 1\8\  B001_X100 Engine Chassis-page124
Date  6th December 1932
  
X402-7

To BY.{R.W. Bailey - Chief Engineer} from E/JNR.{Charles L. Jenner}

c. Wer. Hs.{Lord Ernest Hives - Chair}

E/JNR.{Charles L. Jenner}3/HP.6.12.32.

re Peregrine.

We send you herewith:

LeC.3302 showing the Peregrine cylinder head with modified positions for Nos. 3 and 4 sparking plugs - that is - the two central plugs have been spread outwards, so that we can fit the induction pipe with a complete exhaust jacket.

At the same time we are striving to make the uptake pipe from the carburetter about 1 1/2" longer, but this can not be done until we find another position for the steering box.

LeC.3302 should not be worked to until we have found a satisfactory new position for the steering. *

E/JNR.{Charles L. Jenner}

* The increased space cannot be utilised until we can get the exhaust away below the sparking plug by dropping the carburetter.
  
  


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