Bedplate alignment - Piano wire method

A 0.5 mm diameter piano wire is stretched along each side of the bedplate.
The wire is loaded with 40 KPa horizontal force.
At the centre line of each cross girder , the distance is measured between the wire and the machined faces of the bedplate top outside oil grooves
It will thus be revealed whether the later has changed compared with values during engine installation.
The measurement are taken by micrometer with laser light when touches wire.

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MEOclassIIexamnotes

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