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Cost-saving modification to the tappet block and clamp for the Phantom III.


Identifier  ExFiles\Box 96\2\  scan0220
Date  22th April 1937
  
To Rm {William Robotham - Chief Engineer} /Gry. {Shadwell Grylls} from HPS. {Horace Percy Smith - Experimental Factory Mgr}
354.
HPS. {Horace Percy Smith - Experimental Factory Mgr} 7/VS. {J. Vickers} 22.4.37.

MODIFIED TAPPET BLOCK AND CLAMP LeC.5371.

We have discussed with RHC {R. H. Coverley - Production Engineer} /Cy. the question of cost regarding the above, and give below for your perusal his remarks.

"We have looked into this job and find that a saving of 15/-d per chassis can be effected by die casting and reducing the number of parts. We have also discussed with E {Mr Elliott - Chief Engineer} /JNR. {Charles L. Jenner} the shape of the clamp, who has agreed to a modification reducing the excessive clearance in the fork. The anti-rotation device, while costing slightly more to produce, will definitely cut out the adjusting by filing, which is now necessary.

We therefore recommend the adoption of this scheme".

A set of these tappet blocks is fitted to Phantom III No. 8. Unit.

HPS. {Horace Percy Smith - Experimental Factory Mgr}
  
  
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).


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