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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).
Issue with a 25/30 HP Chassis GTL.75 firing after being switched off.

Identifier  ExFiles\Box 96\3\  scan0127
Date  29th October 1936
  
8519
To Hd.{Mr Hayward/Mr Huddy} from Rm.{William Robotham - Chief Engineer}
Rm.{William Robotham - Chief Engineer}5/AP.29.10.36.
Re. 25/30.HP.Chassis No.GTL.75.
Replying to your query re the trouble experienced on firing after switching off. This is most likely due to a hot exhaust valve or a hot spot in the cylinder head. In production the cores may move and stop up the water passages. We suggest that you try another cylinder head. We assume this car is worse than the average 25/30. chassis.
Rm.{William Robotham - Chief Engineer}
  
  


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