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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 structural analysis showing force diagrams and equilibrium calculations for crossed cantilevers.

Identifier  ExFiles\Box 26\1\  Scan040
Date  19th March 1964
  
- 3 - Tln/CJC. 3.FL. 19.3.64

Now the sign of either We couple is effectively reversed if the cantilevers supporting the loads W at the appropriate end are crossed

FIGURE 3

This is equivalent to:-

FIGURE 4

LONGITUDINAL AXIS.
TRANSVERSE AXIS.

About the longitudinal axis, the net couple at the e2 end is = -W.b + 2.W.b = Wb{Mr Brazier/Mr Bell}
= couple at e1 end.
so equilibrium about longitudinal axis is unchanged.

Continued ............
  
  


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