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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).
Design and materials for the 'Japan 3' brake differentials, referencing scheme 3215.

Identifier  WestWitteringFiles\V\October1930-February1931\  Scan340
Date  14th February 1931
  
K.{Mr Kilner} FROM DA.{Bernard Day - Chassis Design}
C. to SG.{Arthur F. Sidgreaves - MD} WOR.{Arthur Wormald - General Works Manager}
C. to HS.{Lord Ernest Hives - Chair} BY

SECRET
ORIGINAL

JAPAN 3. BRAKE DIFFERENTIALS.

DA{Bernard Day - Chassis Design}2/M14.2.31.

x5360

It is suggested that we should use at any rate the same gears on both foot and hand brake differentials. At the moment they are different.

On N. scheme 3215. we shew the foot brake gears applied to the hand brake. We cannot use the foot brake casing because it needs to be of steel and the hand brake can be aluminium.

The R.{Sir Henry Royce} H.{Arthur M. Hanbury - Head Complaints} crown wheel is brazed into its (long) shaft on the foot brake. It could be made solid with its (short) shaft as shewn on the lower view, unless the advantage of duplication of pieces offsets the economy of making it solid.

The original of N. scheme 3215. is attached to BY's copy of this memo.

DA.{Bernard Day - Chassis Design}
  
  


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