موسوعة اليخوت
Lead keel
Lead keels on sailing yachts: ballast density, FairHelm survey checks for grounding damage, and limits on guessing bolt condition afloat.
ما هذا
A lead keel is a ballast keel made primarily of lead, often encapsulated or externally bolted, valued for high density in a compact volume.
Anchor
Many Nordic performance and cruising designs use lead. FairHelm meets fairing over lead, grounding gouges, and keels that hide bolt stubs inside sumps.
FairHelm judgment
FairHelm judgment: deep grounding marks, weeping at the hull-keel joint, and seized keelbolts matter more than a freshly painted bottom. Lead is dense, not immortal.
Limits
We do not invent safe grounding speeds or bolt life percentages. Haul-out survey and torque history rule.
الأسئلة الشائعة
Q: Is lead always better than iron?
A: Lead packs more weight in less volume. Cost, repair, and environmental handling differ.
Q: Does lead corrode like iron?
A: Lead behaves differently. Joints, bolts, and fairing still fail.
Q: Can I judge keelbolts from afloat photos?
A: Usually no. Access and haul-out checks are needed.