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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).
Instructions for modifications to the gearbox and the starter on engine.

Identifier  ExFiles\Box 15\5\  Scan001
Date  1st March 1926
  
To R.{Sir Henry Royce} from AJS.
c. to CJ. BJ. RG.{Mr Rowledge}
c. to DA.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} Hs.{Lord Ernest Hives - Chair}

X7310

AJS1/M1.3.26.

EAC.V11. X.7770 X.7340
X.7310 X.7850

Referring to the last para. of R2/M27.2.26. in connection with EAC.7. we have issued instructions for the following :-

GEARBOX.
(1) Simplified change lever mechanism, and gate and shaft to suit body frame.
(2) Lightened and simplified gearbox casing.
(3) Flexible suspension for front and rear.
(4) Internal teeth in place of dog clutch for direct drive.
(5) Roller spigot bearing.
(6) Elimination entirely of all starter drive and parts connected with same.
(7) New engine coupling.

STARTER ON ENGINE.
Complete instructions have been issued for fitting this on engine. This incorporates all improvements made to electrical units, modified starter motor ratio, and duplex press button switch.

Although it will not hold up the testing of the car, there are on this section either -
(a) A few fittings required in connection with the transfer of the 2 ampmeter wires, and 3 press button switch wires, from instrument board to dashboard, through the existing small flexible tube, or -
(b) A reconsideration of the scheme of transfer of all the wires from instrument board to dash.

(a) uses existing parts but is not so clean and orderly, and (b) means carrying all wires in one trunk and making a fitting in rear of switchbox so that the conductors from ampmeter and duplex press button switch - 5 in all - can be led into it.
This means a modification to distribution box, but we contd :-
  
  


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