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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).
Gearbox problem and a proposed electrical change speed gear with a magnetically coupled clutch.

Identifier  ExFiles\Box 6\2\  02-page132
Date  27th November 1930
  
Y V23

BY.{R.W. Bailey - Chief Engineer} FROM DA.{Bernard Day - Chassis Design}

DA{Bernard Day - Chassis Design}3/M27.11.30.

Copy to SG.{Arthur F. Sidgreaves - MD}
Copy to HS.{Lord Ernest Hives - Chair}

GEARBOX PROBLEM.

Herewith we send N. scheme 3167. shewing the electrical change speed gear and magnetically coupled clutch proposed by R.{Sir Henry Royce} in his memo.

As regards the electrical system we believe that it is very similar to the Entz transmission. The patent consists in using the electrical transmission for the higher speed ratios and obtaining the lower ratios such as 1st. and reverse by means of gears, thus greatly relieving the duty on the electrical transmission.

DA.{Bernard Day - Chassis Design}
  
  


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