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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 petrol system on the 28-EX model to address issues with heat and vapour trouble.

Identifier  ExFiles\Box 11\5\  05-page138
Date  13th June 1934
  
X7941

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

Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux}21/KW.13.6.34.

28-EX.

Heat to Petrol Pumps.

We have now got the petrol system fitted up as follows :-

(1) Main petrol pipe running in the frame on the offside away from the exhaust.
(2) Petrol pumps on steering column.
(3) Filter on dashboard on level with pump.
(4) No pipe lines across the dash main pipe direct to filter, cutting out petrol cock.
(5) No reserve.

Under these conditions the vapour trouble has been cut down 85%. After hard running and coming to rest, one pump goes on for approx. 20 seconds, then is normal. There is no failure of the petrol supply.

Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux}
  
  


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