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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 design modifications and their status for the Spectre chassis.

Identifier  ExFiles\Box 30\3\  Scan148
Date  3rd April 1935 guessed
  
ITEM. (4)
DESIGN POSITION.
SPECTRECodename for Phantom III CHASSIS - CONTINUED:-
Conventional front suspension - Extra front brake pull off spring and stop. Completed.
-do- Bonnet side plates. Put aside.
-do- Starting handle and bracket. Put aside.
Modifications to hydraulic tappets:- altered eccentric ratio. Completed.
Strengthened step irons. - 3rd car. Completed.
Modified wing stay support. In hand.
Stay on foot brake countershaft. Completed.
I.F.W.S. Higher rating front springs for variable rating springing system. Completed.
Marles steering - lightened rocker shaft. Completed.
Modifications to idler and crankcase to suit larger slipper flywheel. In hand.
Additional hand holes in frame. - 3rd car. Completed.
Modifications to connecting rods. In hand.
Bonnet plate modified to improve accessibility. Completed.
Front bumper - details and fixing. Completed.
Bonnet comparisons - Ph.2, SpectreCodename for Phantom III, 20/25 HP. Wraith. Completed.
Strengthened rear step iron. Completed.
  
  


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