Backstay Tension Calculator

Calculate backstay tension for mast bend control and forestay sag reduction

Input Parameters

Results

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Backstay Tension
lb
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Mast Compression
lb
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Est. Mast Bend
in
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Forestay Sag Reduction
%

Reference

Backstay Tension ≈ Forestay Load / cos(angle) × 1.1 Mast Compression = BS×cos(θ) + Forestay Load More backstay = less forestay sag = flatter headsail