Glisser - what is it? Fiberglass Boats

Most novice anglers and just fans of water walks in choosing their first boat are primarily focused on the power potential. The combination of the material from which a small vessel is made and the engine's capabilities are considered by many to be the main factor in assessing the operational properties of the model. At the same time, design advantages are mainly considered as an indicator of ergonomics.

In fact, it is the hull structure that has the greatest importance for the boat's ability to overcome distances along the water surface. Just in the initial category of boats the so-called glider is distributed. What is this in terms of operation? This is the physically determined ability of small vessels with less resistance to move along the water surface. Under this opportunity, both the design of the model and the material of the case are honed.

General information about the slipstream

The principle of operation of a gliding boat is based on the effect of a flat pebble known to many from childhood, which performs jerky actions at a high launch speed. The flattened surface with a small mass of the object does not simply imply smaller values of the resistance of the water surface, but also receives additional energy for moving forward, that is, slipping. On this principle, and built a marine glider. What is this in the design of boats and boats? First and foremost, it is a flat bottom, providing navigation with minimal support of the power unit. But there is another design feature. The fact is that for the possibility of a glider, it is necessary to pay for the fragility of the same bottom. Even on the lake with the appearance of small waves there is a risk of damage to the hull of the boat. For this reason, the planing models receive V-shaped noses, which cut off the waves. But this is not found in all modifications.

Planing Modes

There are three types of practical glider. This is a displacement displacement format, a transitional and sporting glider, at which speed can reach more than 20 km / h. In the displacement mode, the maximum "spot" of wetting is assumed and the speed qualities of the boat are almost not involved. In this case, the motion is accompanied by the formation of a high wave. The transitional regime is characterized by a high rise of the bow, and the speed averages 17-18 km / h.

Actually, a full-fledged glider in the sport mode is the most desired effect, which is achieved by the management of high-speed vessels. This motion along the water surface, the activator of which is only the high-velocity head of water. In other words, achieving a minimization of resistance to movement is the sporting glider. What is this for practical application? The use of this mode is due not to attempts to obtain a higher power potential or new high-speed capabilities of the vessel. Experienced shipowners use it to reduce fuel consumption. Glisser raises the boat from the water massif and practically leads it above the surface with minimal resistance.

Boats made of polyvinyl chloride

One of the most accessible materials in the segment of small-sized gliders is polyvinyl chloride (PVC). Usually, reinforced fabric is used, the choice of which depends on which planing mode is planned to be used. Also, the advantages of polyvinyl chloride as such can be attributed to lightness and elasticity. In terms of convenience of practical application it is the best option, but in terms of protection against damage, of course, this is not the best choice.

Nevertheless, manufacturers do not abandon this concept, seeking to raise the strength properties of the fabrics that form the boat of PVC. Glisser is also organically combined with polyvinyl chloride, due to the small mass of the object, allowing you to get pretty high in terms of reducing resistance. With a careful operation and the use of suitable adhesive compositions, the working life of such boats can be up to 10 years.

Features of fiberglass boats

Initially solve the problems of durability gliding boats allows fiberglass. It is not so convenient in physical handling and transportation, but in the "field conditions" it shows itself worthily. Of course, if you compare it with aluminum, you will find a lot of flaws, but as a budgetary and more or less serious solution for full-fledged use, fiberglass boats justify themselves. To their indisputable merits is the appearance - which only the sunshine reflections on the body. As for gliding, the material in some aspects is more effective than aluminum and fabric models.

Limitations in the use of fiberglass slabs

Almost all models of gliders are sensitive to operation in shallow waters. Also, fiberglass is contraindicated in a long parking lot with its nose facing towards the shore. Unlike some mixtures of polyvinyl chloride, fiberglass is toxic. And not its very basis, but mandatory protective coatings in the form of gelcoat and especially ether resins. Therefore, the frequency of direct contacts with such housings should be minimized. Special conditions require fiberglass boats in terms of storage. Again, the said gelcoat is characterized by the ability to accumulate moisture, which, upon freezing, exerts a destructive effect on the structure of the body. Therefore, with regular operation at least once a week, you should dry the boat, and long-term storage in the winter period to organize only in heated rooms.

Where are gliders used?

The range of applications of the slider is quite extensive. This is a rescue small boats, and sports, as well as passenger boats with a small capacity. An important condition for the implementation of this regime is low congestion. Not always even the fishermen manage to reach the minimization of the area of contact with the water surface due to the incorrectly calculated distribution of the cargo. It is important to note that an airframe is also practiced. What is it in practice? Most often, it is a ship equipped with pushing propellers. Such equipment is used for security, fire, rescue and some postal models of boats and boats.

What determines the efficiency of a glider?

Regardless of the material for each glider, the same factors are provided to facilitate its implementation. The basic condition for entering this mode is light weight. The ratio of the power potential to the mass of the ship should be such that the object can overcome the wave barriers that are formed at the time of increasing the feed trim. In addition, the shape of the hull influences the hydrodynamic force of confinement. The traditional boat-glider has a flat bottom and a narrow nose.

Conclusion

The introduction of the glider into the mass practice of using small boats is due to a logical desire to reduce fuel costs. Glyssiruyuschy sailing format eliminates the dense contact of the object with the waves, thereby eliminating the need for connecting the power potential from the engine. But it is necessary to take into account some disadvantages of this regime. The fact is that an easy high-speed vessel under the conditions of a glider is subject to rapid wear in the part of the bottom close to the stern. Because of this, for example, the same fiberglass and polyvinyl chloride models regularly require fixing. If, in the case of PVC, the risk of an elementary cut of the fabric is possible in shallow water, then the impact of the coating with fine sandy and stony particles has a negative impact on the plastic. However, modern coatings in the form of the same ethereal resins provide high-quality mechanical protection.