Seaworthiness

Heavy Weather Dynamics: Upwind Sailing, Windage and Resistance

Heavy Weather Dynamics: Upwind Sailing, Windage and Resistance

With tropical cruising becoming increasingly popular and accessible in the last 2-3 decades, trends have developed in outfitting yachts for ocean cruising. Some of these trends that originated from sailing in moderate settled weather areas have resulted in significantly increased risks when a vessel is caught in severe conditions. Many of today’s cruising yachts, whether […]

Design Overview

Design Overview

The sloop Nordkyn is a 13-metre (43′) round-bilge alloy yacht with a displacement of about 8600kg half-loaded in cruising trim. It features a fixed bulb keel with a draft of 2.35m (7′ 9”) and a single deep spade rudder. The alloy construction is very robust without being heavy and the deck is integral to the aluminium […]

Development

Development

Hull shape is the largest contributor to success or failure in yacht design. Appendages can be replaced, rigs modified, but a bad hull is usually where the buck stops. It is just as true for motor vessels. The design of the Nordkyn hull was underpinned by two key objectives: exceptional seakeeping properties and excellent light […]

Transverse Stability, Part 1: Fundamentals

Transverse Stability, Part 1: Fundamentals

Transverse stability is the ability of a vessel to resist and recover from heeling over. It important in the sense that this is what prevents a vessel rolling over and capsizing. For sailing vessels, stability is also needed to develop power under sail other than downwind. Stability is a force moment, i.e. forces separated by […]