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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).
List of modifications and material order request for the 40/50 HP Chassis - N.2 Series.

Identifier  ExFiles\Box 19\4\  Scan115
Date  8th July 1930
  
Hs.{Lord Ernest Hives - Chair} x7772
BY/Cgh{W Clough}3/G.8.7.30.

40/50 HP. CHASSIS - N.2 SERIES MATERIAL.

We are instructing the following modifications to be incorporated in N.2 series, and we are requesting the Order Office to order material for the first half :-

1/- Extra cylinder lubrication.
2/- Front and rear axles lubricated from centralised system. (This includes modified lubrication to ball end of front axle control.)
3/- Larger capacity foot pump for centralised lubrication.
4/- Aluminium ignition wire tubes.
5/- Rear axle with 60" track, wider spring centres.
6/- Wider foot brake shoes in rear axle.
7/- Damping device for servo mechanism.
8/- Clutch with fabric on central disc and clutch spigot lubricated from gearbox.
9/- Dynamo half charge scheme.
10/- Modified clutch shaft with inner support in gearbox.
11/- Centre point suspension for radiator.

You have already issued standardisation sheets covering all the above, but we are also instructing the following features for the first half of N.2 series, for which standardisation sheets have not been issued :-

a/- Hinged filler cap for petrol tank.
b/- Air Silencer for carburetter.
c/- Universal type subframe.
d/- Oil drain plug in bottom half crankcase in more accessible position.
  
  


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