Rolls-Royce Archives
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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).
Engine misfiring issue caused by a faulty Lucas distributor, which was resolved by fitting a Delco distributor.

Identifier  ExFiles\Box 108\2\  scan0246
Date  10th June 1939
  
600 also Elec.

To By.{R.W. Bailey - Chief Engineer}
o.{Mr Oldham} to Da.{Bernard Day - Chassis Design}
c. to By/RD.

RM{William Robotham - Chief Engineer}/WB.{Mr Brazier/Mr Bell}2/JH.10.6.39.

Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} reported 25.G.VI. was misfiring as the heat of the engine increased and that the cause may be due to the coil overheating (considering the weather conditions) After trying three coils we finally traced the cause to the Lucas distributor.

The plate carrying the make and break mechanism have become slack in its bearing thus allowing the whole to rock over as the cam revolved.

A Delco single arm distributor was fitted and the misfiring was cured.

The Lucas has run 4192 miles.

Rm{William Robotham - Chief Engineer}/W.Brazier.
  
  


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