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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).
Letter discussing modifications to Carter's formula for a 6-cylinder engine and related experiments.

Identifier  ExFiles\Box 25\3\  Scan345
Date  5th May 1928 guessed
  
contd :- -2-

The third diagram attached shews the extra
terms that we have added to Carter's formula to make
it cover a 4-bearing 6-cyl. engine. I should be
interested if you could try it sometimes on the
example that you have at Cubridge, and let me know
the results.

I sent the single-crank stiffnesses (corrected
and out-of-bearings) to Carter on Tuesday evening as you
required.

I shall be able to send you some experiences
with the electrical excitation experiments shortly when
we have got a little way ourselves. We shall start on
one of our car engines where we know the critical speed
accurately.

Yours faithfully,
  
  


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