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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).
Alteration to the pivot lean to address high-speed wobbles.

Identifier  ExFiles\Box 67\3\  scan0270
Date  10th September 1925
  
To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}
c.c. to CJ. BJ.
c.c. to RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer}
c.c. to DA.{Bernard Day - Chassis Design} EY.
c.c. to Wor.{Arthur Wormald - General Works Manager}

+ev{Ivan Evernden - coachwork}30

Hs{Lord Ernest Hives - Chair}/Rmd/LG10.9.25.

HIGH SPEED WOBBLES. +457

Alteration to pivot lean.

We have altered the pivot lean on a car from standard to 1° forward. We found that in this condition the car still had a marked tendency to self-centre. We could detect no appreciable improvement in high speed steering wobbles from this alteration. We are trying a car with a forward pivot lean of 5°.

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


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