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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).
Page of calculations and notes regarding linear balance and transverse couples in connecting rods.

Identifier  WestWitteringFiles\M\2October1924-December1924\  Scan11
Date  25th October 1924 guessed
  
-7- Contd.

Note:- It will be seen that

Mx{John H Maddocks - Chief Proving Officer} actually at X

plus the contribution

b
------ Mg of Mg. (see p.5 top)
a + b

add together to give the usual fraction

b
------ M of M
a + b

considered at the crosshead for the purpose of balance.
This we call Mx.{John H Maddocks - Chief Proving Officer}

And that similarly

Mp actually at P

plus the contribution

a
------ Mg of Mg
a + b

add together to give the usual fraction

a
------ M of M.{Mr Moon / Mr Moore}
a + b

considered at the crankpin for the purpose of linear balance. This we call Mp

The extent to which the rule for the linear balance of the con. rods affects the transverse couple balance should now be clear, and it remains to express simply the magnitudeof the unbalanced couple.

It is desired first to make it clear that, linear balance having been completely effected, the outstanding out-of-balance couple due to the con. rod
  
  


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