Here's why:

http://www.ndt.net/article/wcndt00/p...083/idn083.htm

There is a simpler "how" than described.


"Bluto" wrote in message
...

wrote in message
...
Does anybody know how to go about calculating the stresses in standing
rigging. I have an masthead sloop rigged 50 ' FRP boat. 4 lowers, 2
intermediates, 2 uppers, head & back stay. All inboard rigging. I'd
like to know the tensions in the various stays - vs the tensile
strength of the wires. Any ideas on how this is done?
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Instead of calculating it, why not just measure it? All you have to do is
measure the speed of sound in the particular piece of rigging. The speed
is controlled by the tension in the rigging. Just measure the ratio of the
speeds of the longitudinal to transverse waves and you know the tension.
It's not hard and can be done with simple devices.

Bluto