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Old 12-05-2004
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calibrating a backstay adjuster

As an engineering student at Queen''s University Belfast, and having no background in the sailing environment, I was quite naive to take on a project to do with backstay adjuster''s.
I''ve talked to one or two experts in the field of rigging, but would appreciate a broader view on this topic.
What I would really like to know is when installing a backstay how is it calibrated?
Is it possible to have preset values for particular conditions, which would allow you to operate around given slight changes in wind?
The reason I ask these questions is I am trying to develop an interface for backstay adjusters that will allow the operator to make larger adjustments in tension with less stroke/revolution of the winch handle, but at the same time know when to allow for more accurate adjustments. Current systems do allow for small adjustment, but can be quite time consuming if you were making adjustments from one end of the spectrum to the other.
If you can give me so feedback it will be greatly appreciated
Regards David
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Old 12-05-2004
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calibrating a backstay adjuster

The two popular ways of building backstay adjusters are either with a cascade of blocks and tackles, in which case calibration is by marking the cascade falls against the fixed end of the first cascade. or by using hyrdraulics in which pressure readings are used as well as adding a marked batten along side the stay for quick visual reference.

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