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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 sheet detailing the clutch, gearbox, propeller shaft, rear axle, and front axle.

Identifier  ExFiles\Box 23\5\  Scan040
Date  16th December 1927 guessed
  
contd :- -10-

advance of 17°. The electrical system is 6-volt throughout, the dynamo and cutout (Delco Remy) are in one unit. A Delco Remy flywheel starter is used; the pinion is engaged manually before the main switch is closed.

CLUTCH AND GEARBOX.

The clutch is a single plate type on the driven plate; one large diameter coil spring is employed and the usual trunnion thrust bearing is replaced by a circular pad of special graphite composition. No universal joint is provided to take up any out of alignment between flywheel and gearbox. The gearbox is bolted up to the crankcase in the usual unit construction manner. Three forward gears and reverse are provided and operated by central change. There is nothing of special interest in the gearbox, the lay shaft is held stationary and the gears run on two Hyatt roller bearings which run on the lay-shaft. A very poor transmission brake is provided on a 6.5" dia. drum at the rear of the gearbox, this can only be used with comfort for a means of holding the car stationary.

CHASSIS.

PROPELLER SHAFT AND REAR AXLE.

An open propeller shaft is used fitted with mechanics joints, no torque arms are provided, the rear springs taking all the torque. A worm drive axle is employed giving a reduction of 4.75 to 1. Both the worm and wheel run on Timken roller bearings, as also do the rear wheel hubs. The worm is under the worm wheel.

FRONT AXLE.

The front axle is the usual I section forging and
  
  


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