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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).
Solution to steering control rattles on the Phantom III.

Identifier  ExFiles\Box 95\1\  scan0367
Date  18th November 1936
  
350

To By.{R.W. Bailey - Chief Engineer} from Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer}
c. to E.{Mr Elliott - Chief Engineer}
c. to Da.{Bernard Day - Chassis Design}
c. to Mx.{John H Maddocks - Chief Proving Officer}
c. to EV.{Ivan Evernden - coachwork}

Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer}5/AP.18.11.36.

PHANTOM III. STEERING CONTROL RATTLES.

Further to our memo Hs{Lord Ernest Hives - Chair}/FJH.{Fred J. Hardy - Chief Dev. Engineer}24/KW.1.7.36., we have now completed our tests on Loc.4869, which is the scheme for moving the felt collar nearer to the control levers and can say that for complete immunity from rattles it is necessary to have 0.020 - 0.023 clearance between the fitting on the stationary control tube and the worm tube.
The 10,000 miles test car 35-EX. is fitted with this increased clearance and is free from rattle.

Will you please increase this clearance accordingly on production.

Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer}
  
  


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