What do water knives and water pressure plates do?

Wave pressing plate will produce resistance, and wave pressing can naturally reduce resistance. The better the wave pressure, the smaller the resistance, and the bad wave pressure, which is a waste of materials. The function of the water inlet rudder is mainly to cool the motor through the water inlet hose.

Water knife

It is mainly used to stabilize the hull and is often used on O boats.

Water knives help turn.

Is the purpose of the water jet knife to reduce or reduce the lateral sliding of the ship when turning, so as to better control the turning and turning radius (turning)? What is the speed and type of ship (the length and width of the ship, etc.). ) that must be equipped with a water knife?

Increase lateral stability. If you feel unstable when running, add it.

For the model ship, it is difficult to quantify such problems, especially the rolling. It is impossible to measure the angle difference of the ship rolling without a water knife, and you can only rely on your own feelings when playing. In short, the effect of water jet loading will definitely be different from that without water jet, but it is not clear how many changes there are. The smaller the ship, the harder it is to detect the change.

In fact, other methods can also solve similar problems, such as lowering the horizontal position of the center of gravity and increasing the water entry area of the rudder, which can all play a role in reducing rolling.

Real ships, especially ocean-going ships, are large in size and weight, and the water area that needs fin stabilizer is also large. However, for the sake of safety, it is impossible to extend an old thing from the bottom of the ship. At the same time, for the sake of effect, all model ships with symmetrically installed fin stabilizers at the joint between the ship's side and the ship's bottom are small in size, light in weight, influenced by water waves and extremely fast in rolling frequency. At the same time, the hull of model speedboat is usually flat and wide, so it is complicated and difficult to control the weight and increase the width. And if it is installed like a real ship, it is almost equivalent to installing a water guide tank in proportion. Therefore, the water jet is installed perpendicular to the bottom or sliding surface of the ship to increase lateral stability, reduce rolling and prevent rollover. Just like the vertical tail of an airplane and the stabilizer of a sailboat, it plays a more important steering role.