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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).
Challenges of fitting rear bumpers and jacks on B.III, B.50, and Silver Wraith models due to variations in coachwork overhang.

Identifier  ExFiles\Box 118\3\  scan0136
Date  18th June 1938
  
1023
To Da.{Bernard Day - Chassis Design}.. from Ev.{Ivan Evernden - coachwork}
c. By.{R.W. Bailey - Chief Engineer}
c. Rm.{William Robotham - Chief Engineer}
c. Roy{Sir Henry Royce}/Les.{Ivan A. Leslie}
c. DA{Bernard Day - Chassis Design}/JD.{J. Draper - Frames}
SECRET
A.F.M.
Da{Bernard Day - Chassis Design}/Ev.{Ivan Evernden - coachwork}2/N.18.6.38.
Re: Rear Bumper Fixings - B.III. & B.50, and Silver Wraith.

As the coachwork of B.III and Silver Wraith will not be 100% of standardised design, we must expect bodies of varying overhang beyond the back axle.

Likewise, during the experimental stages of the development of the standardised bodies for all of these chassis there will be variations in the body overhang.

At the moment the frames are instructed to come in cut dead to length at the rear to receive the bumper and jack fixing, which is fitted by us to suit a fixed body overhang.

On the next B.III and B.50 bodies we shall wish to increase this predetermined overhang.

It would seem to be advisable to have re-instated the 3.000 of surplus frame, and for the experimental cars instructions would need to be issued that the frame be cut off and the jack fixing be fitted to suit the particular body being mounted.

The scheme as at present designed does not seem to be ideally suitable for our trading conditions. It does not seem reasonable to expect a standard overhang on B.III. and Silver Wraith, or in fact B.50. Neither does it seem reasonable production procedure to leave the frame long to be sawn off by the coachbuilder, and to expect him to drill and fix the rear jack and bumper forging.

Ev.{Ivan Evernden - coachwork}
  
  


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