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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).
Design changes and progress for a Speed Model chassis and components.

Identifier  WestWitteringFiles\L\2April1924-June1924\  Scan6
Date  14th June 1924
  
TO CJ. BA. HS.{Lord Ernest Hives - Chair} FW.
FROM R.{Sir Henry Royce}
ORIGINAL
SECRET
R3/14.6.24.
E.{Mr Elliott - Chief Engineer} A.{Mr Adams} C. 11.
SPEED MODEL.
X8770
8770

I assume that CJ. is very anxious that BY.{R.W. Bailey - Chief Engineer} shall be in a position to instruct the material for EAC.2s. at the earliest possible moment, so that we can deliver as soon as the 10,000 miles have been satisfactorily completed.

As far as I understand nearly all the work and is can be put in hand, as follows:-

FRAME.
The frame, both for long and short chassis, is like the 40/50 frame, but (1) altered slightly at the front end for 45" springs, (2) has the joggle 1" further back to improve the coachwork, (3) has an extension at the back for petrol tank protecting luggage grid, and (4) in plan the rear width is increased 1".

FRONT & BACK AXLES, & BRAKES.
The front axle is as EAC.3. and the back axle is the ordinary 40/50 back axle, but extended 1" in wheel track, and in spring pads.

CROSS MEMBERS.
The cross members are the same as 40/50 ex- (but 1" longer) cept the front one which is a special design, sent many months ago.

RADIATOR & BONNET.
The radiator design is already in the hands of Derby, and it and the bonnet have been approved by Sales.

DASHBOARD.
The dashboard is wider and higher as instructed. (1)

[Handwritten in left margin]:
New chass
6 weeks
admited
13/6/24

D.O.

D.O.
  
  


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