sivutuulipurjeistukseen

Sivutuulipurjeistus, also known as a wishbone or wishbone boom, is a type of sail rigging used on sailing vessels. It consists of a single gaff rigged sail that is controlled by two booms. These booms extend outwards from the mast and are attached to the foot of the sail, creating a triangular shape. This configuration allows the sail to be easily trimmed for sailing on various points of sail, especially when reaching.

The main advantage of sivutuulipurjeistus is its ability to handle a wide range of wind conditions efficiently. The two booms allow for precise control over the sail's shape and fullness, enabling the boat to maintain good speed and stability. This system is particularly effective when sailing across the wind, as the booms can be splayed out to capture more wind.

Historically, sivutuulipurjeistus was common on smaller sailing craft and fishing boats, especially in Northern Europe, where it was valued for its simplicity and effectiveness in often unpredictable weather. While not as common on modern racing yachts, it can still be found on some traditional sailing vessels and smaller cruising boats. The design offers a good balance of performance and ease of handling for certain types of sailing.