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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).
Specification revision for Bentley Chassis 4-B-50, detailing changes to the rear axle.

Identifier  ExFiles\Box 111\4\  scan0213
Date  20th May 1941
  
800a

To,Rm.{William Robotham - Chief Engineer} from Rm{William Robotham - Chief Engineer}/CP.
cc Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} (struck through)

Rm{William Robotham - Chief Engineer}/CP.9/LH.{Mr Haworth}20.5.41.

Bentley Chassis 4-B-50.

Bentley Unit B.80-No.1.

Specification of the above Chassis is revised as follows :-

Work carried out at Clan 8.5.41.

Previous specification
Rear Axle LOP.GB.4234
9 x 37 ratio (axle No.3-B-50)
C/E to above LOP.
GB.3486 Bevel wheel) 9 x 37
GB.3487 Pinion ) U.S.A
GEARS.
--
removed

Revised Specification
Rear Axle LOP. GB.4234.
9 x 37 ratio. 1.5 off set semi floating axle (axle No.Exp.2)
C/E to above LOP. incorporating
GB.3486 Bevel Pinion) 9 x 37
GB.3487 Pinion ) S/ZN
U.S.A.
GEARS.
One new Timken roller bearing fitted to N.S Diff.casing.
Hoff.345 Bearing fitted to O.S. Diff casing - this bearing has ball locating holes elongated to .100.

Rm{William Robotham - Chief Engineer}/CP.
  
  


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