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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).
Standardisation of a 14-toothed axle for different vehicle weights and suggesting alternatives for armoured cars.

Identifier  ExFiles\Box 49\1\  Scan359
Date  12th July 1921
  
X3545

To Hs. {Lord Ernest Hives - Chair} from R. {Sir Henry Royce}
c. to CJ.
c. to BJ.
c. to PN. {Mr Northey}
c. to Wor. {Arthur Wormald - General Works Manager}
c. to Da. {Bernard Day - Chassis Design}
c. to BY. {R.W. Bailey - Chief Engineer}

R14/G12.7.21.

X.4299 - RE. 14-TOOTHED AXLE.
X.3545

I quite agree with the standardisation of this axle for the heavy cars, (i.e. over 50 cwt. complete with passengers) the 15-toothed one doing excellently for the light cars, and certainly seems to have no disadvantage, the petrol consumption being very little affected by the change. I always thought the consumption might increase more quickly.

We have now carried this matter far enough except with excessively heavily weighted car/armoured cars of 4.5 tons when I think a double reduction 6 to 1 back axle will be needed; this, we are suggesting.

R. {Sir Henry Royce}
  
  


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