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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).
Helix angle of Cadillac steering and comparing its shock immunity to La Salle steering.

Identifier  ExFiles\Box 28\3\  Scan076
Date  22th November 1934
  
x4094

To E.{Mr Elliott - Chief Engineer}
c. to Wor.{Arthur Wormald - General Works Manager}
c. to Da.{Bernard Day - Chassis Design}
c. to Hy.{Tom Haldenby - Plant Engineer}

Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}4/KW.22.11.34.

We have just received the following
cable from Olley in response to our telegram asking
him for details of the helix angle on the Cadillac
steering :-

"HELIX ANGLE SIX DEGREES 35 MINUTES AT CENTER".

We think this is interesting in that
the Cadillac steering is definitely more immune from
road shocks than the La{L. A. Archer} Salle steering at present
fitted to the SpectreCodename for Phantom III.

Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}
  
  


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