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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).
Clutch housing modification to prevent the top gear from jumping out of mesh.

Identifier  ExFiles\Box 136\2\  scan0123
Date  24th June 1939
  
1153

To By/CRL.{C. R. Lisson} from Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}
c. HPS{Horace Percy Smith - Experimental Factory Mgr}/RH.{R. Hollingworth}

Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}1/MH.{M. Huckerby}24.6.39.

CLUTCH HOUSING FOR USE WITH IRON ENGINE.

We have discovered that the rib shown on the attached blue print BL.1146, does some good in preventing deflection of the clutch housing likely to cause top gear to jump out of mesh. We are very shortly producing six more alum clutch housings and shall be glad, therefore, if you will incorporate this modification on the drawing and let HPS{Horace Percy Smith - Experimental Factory Mgr}/RH.{R. Hollingworth} have a copy as soon as possible.

Rm{William Robotham - Chief Engineer}/Gry.{Shadwell Grylls}
  
  


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