The alloy is a unique vessel used for water tourism, which is very popular today. It was created in the seventies of the last century on the idea of Muscovite S. Papush. And just ten years later, a catamaran for rafting on a river became the most popular watercraft with a very wide range of applications. It is used for family walks in calm rivers, and for a record passage of turbulent streams.
The catamaran for alloys consists of two air-containing two-shell nacelles or inflatable bodies connected by a frame. For their production, various types of fabrics are used. Sometimes multi-seat catamarans are created, in which up to eight people can fit. As a rule, they are used for the passage of rapids of rough rivers.
The nacelles that make up the catamaran for the alloy are made, as a rule, of high pressure polyvinyl chloride. Because of this, they are inflated to such a state that it can be used without longitudinal stingers lying parallel to the cylinders.
The design uses only transverse stingers, and as a result, catamarans are assembled in just fifteen minutes. PVC nacelles, in contrast to the rubberized material, are much less destroyed and rot, so they do not need special care.
Rowers are located on special seats - pyramids located symmetrically on both sides. Unlike a floating craft such as a raft, a catamaran for an alloy has its own speed, which determines the technique for overcoming obstacles on it. The most versatile is its four-seater version, with which it is more convenient to go through rather difficult routes, to overcome obstacles considered insurmountable.
On such catamarans it is very convenient to carry out insurance. In addition, they are comfortable just relaxing on the river. However, most often alloy catamarans, the photos of which are familiar to everyone, are used in competitions in such a sport as water slalom, having established itself as a safe, high-speed and maneuverable vessel.
The advantages of this craft are lightness and speed during assembly, ease of transportation, high carrying capacity with a margin of buoyancy, as well as fairly stable behavior on the water. A well-functioning team of this vessel with the help of rhythmic and powerful strokes can deploy a loaded catamaran at full speed, and then also disperse it.
A catamaran for rafting on rough water behaves better than a raft, the use of which for commercial purposes is practical and rational only for simple routes because of its large drag. In addition, the latter has an unsuccessful landing for rowers.
Today, the industry produces a fairly large assortment of catamarans, which are designed for recreational and sports rafting on rivers with different categories of complexity.
The frame is made of pipes made of duralumin material and having a special coating from the effects of the external environment. The semi-rigid structure of the catamaran - the stinger nodes - is bolted to the pockets.