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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).
Stiffening camshafts for the rear brakes by increasing their diameter and drilling them out, comparing them to the Phantom model.

Identifier  ExFiles\Box 13\2\  02-page002
Date  5th March 1927
  
To BY.{R.W. Bailey - Chief Engineer} from DA.{Bernard Day - Chassis Design}
c. to BJ. HS.{Lord Ernest Hives - Chair}

47090

DA{Bernard Day - Chassis Design}2/M3. 5. 27.

EAC. 7. FRONT BRAKES.

X. 7420
X. 7090 X. 7360

With reference to the question of reducing the sponginess of the rear brakes, we send herewith N.sch. 2405, shewing the two camshafts stiffened up by increasing the dia. and drilling out. The effect is to make these shafts 50% stiffer than the Phantom, but on account of the increased leverage on EAC.7. the motion on the pedal is only slightly less than on Phantom, namely, approx. .094 instead of .1. The weight of the shaft however is appreciably less than Phantom.

It will be seen that new pieces are called for, though of precisely similar design to those now in existance.

DA.{Bernard Day - Chassis Design}
  
  


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