Category Archives: Technical

Mainsail Cut On The Sparcraft Aftermarket Mast on the J/105

The original Hall spar on the J/105 bends primarily at the upper quarter when backstay is applied. That is a universal defect in the Hall spar, and why you commonly see permanent bend and stress cracks at the hounds, and increasingly breaks. It is more frequent in windier areas like San Francisco Bay, though it happens everywhere.…
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