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Friday, July 2, 2010

A Class Cat Carbon Boom: Mid Boom Sheeting

Only by learning to sail a boat type firsthand...

The experimentation continues. This time to get a handle on the pros and cons of mid boom sheeting.
As a designer my instinct is to prefer end boom sheeting off the traveler. It is mechanically more direct, doesn't put large bending stresses on the boom, and does not use the trampoline (stretchy) as part of the sheeting system.

But there is something to be said ergonomically for mid boom sheeting so we should try it and then make an informed decision.

Assuming the boom tube is stiff enough, this solution gives the flexibility of switching systems with virtually no parasitic weight. It consists simply of a foam and carbon 'stopper' to locate the mid boom block strop and a similar stopper to locate the boom end block strop.
The sail strop sits inboard of the boom end block to accommodate shorter footed sails.

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