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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).
Specification document for the 20 Spectre Chassis, with handwritten annotations.

Identifier  ExFiles\Box 4\1\  01-page371
Date  25th May 1935
  
'G' SECTION.

SPECIFICATION FOR 20 SPECTRECodename for Phantom III CHASSIS.

Flywheel and Clutch. To be as at present instructed experimentally, but splines and the clutch shaft may have to be hardened.
Handwritten: Altered back plate and throw out bearing
Handwritten: Phantom practice of throw out clutch

Engine Coupling. As at present instructed experimentally.
Handwritten: Have a look at these parts

Gearbox & Actuating Shaft. As at present instructed experimentally and to suit the larger servo.

Speedometer Drive. As at present instructed experimentally.

1st. and 3rd. Motion Shaft. As at present instructed experimentally, with ball bearings and not roller bearings on the 1st. motion shaft.
Handwritten: * MUST URGE THESE EXPERIMENTS

Servo Drive. To suit larger servo motor.

2nd. Motion Shaft. As at present instructed experimentally.

Reverse Gear. As at present instructed experimentally.

Change Gear & Brake Mech: Not to be ordered at present.
Handwritten: NOISE INSULATION

Rear Hand Brake Equalising Gear. To suit the type of adjustment as fitted on Bentley.

Rear Foot Brakes - Intermediate Shaft. To suit the type of adjustment as fitted on Bentley.

Propeller Shaft & Universal Joints. As at present instructed experimentally.
Handwritten: * URGE RUBBER MOUNTING OF GEARBOX
  
  


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