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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).
Governor spring data specifications for the Continental Bentley distributor.

Identifier  ExFiles\Box 168\3\  img124
Date  30th March 1939
  
To, By/RD.
c. to By
c. to Rm{William Robotham - Chief Engineer}/cwd?

Rm{William Robotham - Chief Engineer}/RC.{R. Childs}1/JH.30.3.39.

re Distributor to T.P.DF.2300.
Continental Bentley.

The governor spring data for obtaining the required characteristic on the above is as follows :- (see Rm{William Robotham - Chief Engineer}/rwd1.13/Mh.{M. Huckerby}22.2.39).

Main Spring. Auxiliary Spring.
Load............................... 1 lb. 12 oz. 2 lb. 4 oz.
Length............................. .450 inch. .600 inch.
Radius of loading.................. .675 inch. .675 inch.
Total deflected angle.............. 170° 170°
Free angle......................... 115° 140°
Inside diam. of coil............... .276 inch. .276 inch.
Number of effective coils.......... 3 1/2 5 1/2
Diameter of wire................... .048 inch. .064 inch.

Rm{William Robotham - Chief Engineer}/RC.{R. Childs}
  
  


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