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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).
Theoretical investigation into the steering qualities of the Bentley III, comparing different rear spring designs.

Identifier  ExFiles\Box 100\2\  scan0013
Date  15th October 1937
  
[Handwritten: 2080]
[Handwritten: 450]

To Da.{Bernard Day - Chassis Design} from Ev.{Ivan Evernden - coachwork}
c.c. to By.{R.W. Bailey - Chief Engineer} Rm.{William Robotham - Chief Engineer} Rm{William Robotham - Chief Engineer}/Les.{Ivan A. Leslie} Rm{William Robotham - Chief Engineer}/RJH. Da{Bernard Day - Chassis Design}/Ev.{Ivan Evernden - coachwork}7/N.15.10.37.

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Re: BENTLEY III - STEERING.

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[Handwritten: F.H.]

We have made a theoretical investigation into the steering qualities of the Bentley III, having :

(1) Original design of rear springs.

(2) Rear springs having positive camber (OY's suggestion)

and have compared these qualities with those of the standard Bentley.

Attached herewith is a report of the investigation by Da{Bernard Day - Chassis Design}/DB.{Donald Bastow - Suspensions} and PD.35.

The general conclusions are as follows:-

(1) The use of the cambered (positive) rear road springs will not in itself cause oversteer, although the tendency to do so from this cause will be greater than on the standard Bentley.

(2) The tyres are by far the largest factor deciding whether the car will either under or over-steer.


Ev.{Ivan Evernden - coachwork}
  
  


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