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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).
Dimensions for an American straight-eight crankshaft, specifically a Pontiac model.

Identifier  ExFiles\Box 22\4\  Scan020
Date  8th October 1934
  
X6708

E.{Mr Elliott - Chief Engineer} From Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}

Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}9/MA.8.10.34.

AMERICAN STRAIGHT-EIGHT CRANKSHAFT.

Here is a blueprint of the Pontiac crankshaft. I should not take this as being a particularly good sample. A more up-to-date engine is the one fitted to the LaSalle the dimensions of which are as follows :-

Main Journals. Diameter. Length.

Front 2.250 1.625

Front Inter. 2.437 1.250

Centre 2.500 1.375

Rear 2.562 1.250

Rear 2.625 1.562

Crank pins 2.250 1.375

Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}
  
  


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