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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 schemes related to the 20/25 HP Chassis.

Identifier  ExFiles\Box 30\4\  Scan096
Date  19th February 1934
  
- 11 - BY.1/G.19.2.34.

20/25 HP. CHASSIS.

RR.Sch.570 Cast Brush Holders. 20/25 Dynamo (Shunt).
Not being detailed until scheme approved.

Ev.{Ivan Evernden - coachwork}S.114 Modns. to Chassis to permit of Deeper Wells
in the Floor ........................ Recd. 5.1.34.
Detail drawings completed and issued ..... 9.2.34.

LeC.3758 Crankshaft - Increased Balance Weights .... Recd. 8.1.34.
Detail drawings completed and issued ..... 16.1.34.

N.Sch.3910 Engine Coupling for E.N.V. Gearbox using
Standard clutch ...................... Recd. 23.12.33.
Detail drawings completed and issued ..... 8.2.34.

N.Sch.3917 Expt. Clutch & Gear Change Operation. ENV.
Gearbox with standard RR. clutch ........ Recd. 23.12.33.
Detail drawings completed and issued .... 6.2.34.

N.Sch.3930 Modfn. to Clutch Shaft on N.Sch.3910 .... Recd. 1.1.34.
Detail drawings completed and issued .... 8.2.34.

N.Sch.3927 Servo Shaft - Outboard Ball Bearing ..... Recd. 2.1.34.
Detail drawings completed and issued .... 31.1.34.

N.Sch.3937 Modfns. to Brake Equaliser Bkts. etc. for
the fitting of spherical bearings ....... Recd. 4.1.34.
Detail drawings completed and issued .... 6.2.34.

Ev.{Ivan Evernden - coachwork}S.115 Revised Special Touring Saloon ........ Recd. 18.1.34.
Detail drawings not required.

RR.Sch.593 Concealed Front Crossmember.
Detail drawings completed and issued .... 7.2.34.

RR.Sch.598 Flexible Suspension & Attachment of Nozzle
Universal Swan Neck ...
Detail drawings completed and issued .... 13.2.34.

RR.Sch.599 Layout - Rear Brakes Intermediate Shaft.
(To suit EVs.114).
Detail drawings completed and issued .... 9.2.34.

RR.Sch.601 Mod. to Sch.1617 for fitting hand operated
shutters to A.{Mr Adams} C.2. chassis.
Detail drawings completed and issued ..... 26.1.34.
  
  


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