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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).
Speedometer gear ratios, noting a 3% fast reading on Mr. Royce's car and proposing an alteration for two India chassis.

Identifier  ExFiles\Box 6\4\  04-page189
Date  5th August 1928
  
To BY.{R.W. Bailey - Chief Engineer} From Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson}

X 5>10

Hs{Lord Ernest Hives - Chair}/Ru2/LM.5. 8. 28.

SPEEDOMETER GEAR RATIOS. X 4358

On Mr. Royce's car the mileage recorder reads 3% fast.

As we propose to fit small instruments to both the two India chassis we are at present manufacturing, we think it is worth while altering the speedometer drive ratio in the gearbox by 3% on these two chassis so that we can get the correct speedometer to be used on all cars when the 19" rim comes on production.

We attach a letter from Messrs. A.T. which explains the situation.

Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson}
  
  


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