Comparison Joysway Silverline EP ARF vs Joysway Silverline GP RTR

— RTR (RTF). Models ready to go “out of the box”: all the necessary equipment is included in the package (with the exception of replaceable batteries for the remote control and/or the boat itself), and only the simplest assembly may be necessary before sailing. This option is best suited for beginners and undemanding users — it eliminates the hassle of re-equipping the vessel. But enthusiasts and professional modelers should take into account that even advanced RTR models are usually equipped with relatively simple components, and it can be easier to get the necessary characteristics by assembling an ARR or Kit yourself (see below).

— ARR (ARF). 'Almost Ready to Go' Models: Comes assembled (or nearly assembled) but missing some components — usually dedicated batteries, and in many models also control hardware. The point of such kits is that enthusiasts can select additional equipment at their discretion, without relying on the decision of the manufacturer.

— Kit (set). Models supplied as a set of separate parts that, after purchase, have yet to be assembled into a finished boat. Many components are missing in such kits, and the bundle may be even poorer than in the ARR described above — for example, some "whales" are even supplied without a motor. However, given the purpose, this is not a disadvantage, but rather an advantage: this option is intended f...or enthusiastic modellers, for whom the ability to independently assemble and equip a vessel is no less valuable than the ability to launch a finished boat.

The type of engine used in the boat.

— Electric. Electric motors have a number of advantages. So, they are simple in design, inexpensive, do not require special skills either in operation or maintenance (in fact, most often special maintenance is not needed at all), and at the same time they are suitable for models of any level, from beginner to professional. In addition, the electric motors are relatively quiet and do not create exhaust gases, which allows you to run the model without problems even in a closed room, such as a swimming pool. Due to this, this type of engine is by far the most popular among radio-controlled boats. And it is electric motors that are recommended for beginner modellers, as well as for those who buy a boat solely for fun.

— ICE (fuel). Internal combustion engines on special "model" fuel, most often nitromethane (or mixtures of nitromethane with methanol). All internal combustion engines are much more complicated and more expensive than electric motors — both in design and in use and maintenance; in addition, they are very noisy and produce exhaust gases. However, some users consider this not a disadvantage, but an advantage that makes the model look like a real car. In addition, the internal combustion engine also has unambiguous advantages: high power, long operation on one gas station, fast refueling (whereas charging the battery takes quite a long time). As for nitromethane, it is much better suited for small engines tha...n gasoline, and allows you to create simpler and more efficient units. Therefore, among radio-controlled models, engines using this fuel are mainly used; they are not compatible with gasoline.

— ICE (gasoline). For efficient operation, a petrol engine must have a fairly large volume; in addition, such units are noticeably heavier, more complex and more expensive than the above-described internal combustion engines running on special fuel. As a result, this variant is extremely rare, exclusively in large-scale professional-level models.

The name of the engine installed on the boat. Usually, knowing this name, you can easily find information about the features of the engine — both official manufacturer data and reviews from users — and determine how much you are satisfied with its characteristics. This can be very important when choosing a professional grade model.

In addition to the name, this paragraph may also specify the type of electric motor (see "Motor") — collector or brushless.

The collector design can be called classical. It allows you to create fairly light, compact, inexpensive motors, which are also easily repaired. The disadvantages of this option are relatively low efficiency, a tendency to spark (especially when overheated), as well as less durability than brushless units. In addition, with a collector motor, it is more difficult to ensure high speed. As a result, this option is typical for relatively inexpensive and slow models.

Brushless motors are considered more advanced than brushed motors: they are more powerful, more economical, more durable, better protected from pollution and are well suited for overclocking to high speeds. On the other hand, such engines are much more expensive, and the complexity of the design does not allow you to repair the motor on your own. In light of all this, brushless motors are predominantly used in advanced high speed craft; the presence of such a motor is an indicator of a rather high class model.

Radio-cont...rolled models can be produced in two versions, differing only in the type of electric motor.

The total working volume of the internal combustion engine cylinders (gasoline or fuel, see "Engine") installed in the boat. In general, the larger the volume, the more powerful the engine, with the same type of fuel, however, the consumption of this fuel is usually higher. At the same time, engines of the same volume can have different power, and the performance of the boat depends on many other factors. Therefore, when choosing, it is easier to focus not on the volume of the engine, but on indicators closer to practice — for example, the speed claimed by the manufacturer.

For professional use, there are recommendations for engine volumes; they can be found in special sources, here we only note that the volume can serve as a criterion for admission to competitions.

The volume of the fuel tank installed in a boat with an internal combustion engine (see "Engine").

In fact, this parameter is more of a reference value, it can only be useful for calculating the time spent at a gas station (if fuel consumption is known), as well as for estimating how many gas stations the available fuel will last. In general, a large supply of fuel, on the one hand, allows you to work longer on a single refill, on the other hand, it affects the weight of the vessel. Therefore, manufacturers usually proceed from a reasonable compromise — they equip their equipment with tanks, which, when fully refueled, are enough for 20-40 minutes of movement with a standard engine. This time is usually quite enough, and the fuel supply does not make the model too heavy.

The presence of double water protection in the design of the boat.

By itself, all radio-controlled ships have water protection — by definition; usually, it is provided by a sealed enclosure. However, some models provide additional protection for sensitive components, primarily electronics — for example, in the form of a cover under the case, or even a separate closed compartment. This increases the overall reliability of the design: if the first layer of water protection is damaged (for example, in the event of an accident), water will still not get on critical parts, and instead of replacing the electronics (or buying a new model), it is likely that it will be possible to get by with repairing the case.