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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).
Instructions for testing an OHC engine with sodium-filled valves in comparison with a B.60 engine.

Identifier  ExFiles\Box 155\2\  scan0267
Date  15th November 1938
  
-5-
Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}1/MH.{M. Huckerby}15.11.38.
NO. 2 TEST HOUSE.
OHC ENGINE.
Fit this unit on bed and note exhaust valve temperature
with Sodium filled valves.
Also try switching off in comparison with B.60 engine.
Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}
  
  


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