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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 for a large bore Bentley car, detailing engine and chassis components.

Identifier  ExFiles\Box 83\1\  scan0052
Date  6th November 1935
  
X 200 a
4

To SG.{Arthur F. Sidgreaves - MD} & Wor.{Arthur Wormald - General Works Manager}
c. to E.{Mr Elliott - Chief Engineer}
c. to Hy.{Tom Haldenby - Plant Engineer}

HS{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}19/KW.6.11.35.

6-B-IV.

The following is the present specification of this car, which is being built with a view to getting it over to France as soon as the final large bore Bentley unit is ready :-

ENGINE UNIT.

(1) The final big bore engine unit, which will include the latest valve gear.
(2) New air intake silencer and bend to suit large bore unit.
(3) Hall's metal bearings throughout.
(4) Larger carburetters and larger induction pipe.
(5) Cantilever throttle controls.
(6) 10" Borg & Beck clutch with ventilated casing.
(7) Delco Remy Distributor (8) Large Slipper wheel (9) Slotted low expansion valves (10) 45° Helix Angle Timing Gears

CHASSIS.

(1) 20/25 type of rubber engine mounting.
(2) Cantilever pedals;
(3) Centrally mounted wings and radiator.
(4) 14" lightened drums with reduced arc of embrace.
(5) Modified and lightened exhaust system to suit big bore engine.
(6) Lightened petrol tank with outside filler.
  
  


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