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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 units and modifications for testing on the Phantom 25-EX model in France.

Identifier  ExFiles\Box 11\3\  03-page361
Date  18th May 1931
  
To Hs.{Lord Ernest Hives - Chair} From GWH.{George W. Hancock - Head Chateauroux}
Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux}3/KT.18.5.31.

PHANTOM. 25-EX.

We should like the following units tested in France.

Rear Brakes.
Standard Drums. 40% Stiffer
Pilot shoes to sch.1433. Ferodo Lined.

Front Brakes.
Standard Drums.
Pilot shoes G.78632. Ferodo Lined.

Long Skirt Piston. E.82041.
Nx. supplying a set

Propeller Shaft. universal joints oil scheme EX.6255.

Dynamo. larger output.
24 slot armature.
10 turns per coil using 17 S.W.G. D.C.C.
Trailed poles.

Bonnet.
Flip flap shutters for steel bonnet. N. sch.3233. Alum Bonnet 3232.

Spring Clips. for oil pipes on road springs. F.8376b/7.

Starter Motor. self lubricated bearings D.73318. D.73317. Contact to be earlier. Brock's scheme.

Servo. to be lined with Ferodo bonded asbestos RAD.13/047 & U.S.A. ball bearing cams.

Front Shock Dampers. to have oil feed pipe N. sch. 3244.
[struck through] Rear Shock Dampers latest modifications

Cam Shaft Squawk.
Expl. design of oiling cams.

Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux}
  
  


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