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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).
Comparing Cadillac and Packard engine components and discussing crankshaft balance.

Identifier  ExFiles\Box 173\4\  img166
Date  16th December 1935 guessed
  
particularly when run up light under which condition the torque is weakest & has none of the periods inherent in a SpectreCodename for Phantom III. The overhauled V8 is and rather
Our job not bad when the flanged nose shafting.

On the Cadillac Viz the comment period is limited inherently & also a lower period is detectable by holding the gear lever. There was not much vice in
in the road & for the Packard not felt altho its
Shafts were very free and on this chassis apparently due
to the massive crankshaft. Packards were certain
to Zaphyr a rough reason in direction of reactions and crankshaft is not up to the high compressions attainment.

Cadillac maintain that it is from broken oil delivery to 6 throw crankshafts that cause bad torque groans &
reason large clearances. Their V8 2 1/2" journal with no
or ordinary Albion oiling had at No 6 2 1/2" Crossdrilles clearances
This peculiarity is 7 thou replaced by Eric Wolds Researches
into dynamic balance. The photo deflection curves of
a 6 throw crank were subjected a rough edge at the
axis and loaded from at hours 1 & 6 then 2 & 5
and 3 & 4 giving results

(Diagram with numbers 24 and 4.6)

He then calculated the amount of balance weights required
  
  


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