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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).
Car modifications, specifically a special cam, and petrol consumption results.

Identifier  ExFiles\Box 107\1\  scan0292
Date  1st May 1935
  
HS{Lord Ernest Hives - Chair}
+569 Rm{William Robotham - Chief Engineer}

To Wor.{Arthur Wormald - General Works Manager} from Sg.{Arthur F. Sidgreaves - MD} re My Now 20/25 - GLG-5.
Copy to E.Hs.{Lord Ernest Hives - Chair}

Sg{Arthur F. Sidgreaves - MD}9/E1.5.35

Many thanks for Worl/R.29.4.35.

Dealing with the brakes, I find that Cx.{Major Len W. Cox - Advertising Manager} had already made arrangements to fit the special cam to GSP-4 and, as I regard the Trials car having good brakes as more important than my car, I did not alter the arrangement.

I should, therefore, like to have another cam as soon as convenient, together with the other modifications numbered 2, 3 and 4 in your memo., as soon as they are available, so that I can test the complete outfit of improvements.

Re petrol consumption, I note you are changing the carburetter and will let you know the result in due course.

If the petrol consumption results you give, as obtained by the Test Dept. and as obtained on your car, are from ordinary driving as distinct from a straight-forward petrol consumption test at a set speed of 30 m.p.h. or so, then we consider that they are very much better than anything we are obtaining.

As a matter of fact this last week-end I used C's car, GAE-19, ex-Trials. I hardly drove it fast at all, covered a total distance of about 185 miles, mostly out of London and the petrol consumption was just under 14 miles to the gallon.

Sg.{Arthur F. Sidgreaves - MD}
  
  


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