Rolls-Royce Archives
         « Prev  Box Series  Next »        

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).
Laboratory report on a broken valve from a Wraith 26-G-V1 engine, discussing potential causes.

Identifier  ExFiles\Box 108\1\  scan0210
Date  16th September 1937
  
Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}
Rm{William Robotham - Chief Engineer}
HPS{Horace Percy Smith - Experimental Factory Mgr}
Hl/EW
Swdl{Len H. Swindell} Hives 600a
BY.7/G.16.9.37.

WRAITH 26-G-V1. RE: BROKEN VALVE.

The Laboratory report on the broken valve from the above engine, whilst it indicates a choked water way, does not connect the failure with the choked water way, as the latter is too far removed from the valve seat to affect the issue.

The valve has been very hot, and has stretched due to force of impact of the valve on the seating, which may be due to the valve leaving the cam before the toe of the latter becomes effective.

A contributory factor may be insufficient sectional area in valve head to allow the heat to escape via the seat or an insufficiently cooled seating due to water flow through the head not effectively cooling the seat.

By
BY.{R.W. Bailey - Chief Engineer}
  
  


Copyright Sustain 2025, All Rights Reserved.    whatever is rightly done, however humble, is noble
An unhandled error has occurred. Reload 🗙