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If the boat wants to exercise on the water, it needs to provide external force to push it, so that it can overcome the resistance during exercise. In the past, there were many ways to provide thrust, which can be roughly divided into four categories. One is manpower, such as paddles, fences, and slaps; the…

The CLT propeller has a wide blade tip and an end plate. Based on the wake contraction principle of the propeller, the diameter of the blade is reduced correspondingly along the edge, and the end plate is located on the pressure surface of the blade tip, and the shape is consistent with the shape of…

The air motor uses the engine room to compress the starting air. In the winter in the north or the cold season in the south, improper use of lubricating oil can easily cause the rotor blades to stick and slide freely, or the moisture in the compressed starting air is in the transmission pipeline or…

(1) The hydraulic motor needs to be positive and negative, and must have symmetry in the internal structure, and the hydraulic pump often rotates in one direction. In order to improve efficiency, most of them are asymmetrical. For example, gear pumps often use an asymmetrical unloading groove structure, while gear motors must use symmetrical; the…

The most intuitive is the different purpose: hydraulic pump is a device that converts the mechanical energy input by the prime mover into hydraulic pressure energy, and is the power element of the hydraulic system; and the hydraulic motor converts the hydraulic energy input from the hydraulic pump into mechanical energy for rotary motion ,…

Scientists have discovered a new method in which a generator supplies power to the motor propeller to propel the ship. The motor propeller is actually a motor assembly installed in a "duct". A permanent magnet excited stator is placed in the wall of the draft tube, and a propeller whose blade end is fixed on…

In reservoirs or large-scale water fishing, an inflatable rubber boat is very necessary, on the one hand to have a good fishing spot, on the other hand for safety. Inflatable boat maintenance needs to pay attention to the following points. In daily fishing, you can inflate enough in the morning and evening, and when the…

Two-blade propellers are usually used in propeller aircraft, and three-blade propellers are usually used in ships. From the perspective of the size of the propellers, we usually see large two-blade propellers and small three-blade propellers. They are mainly used for different media with different densities. The density of air is less than the density of…

Material analysis of ship propeller The material of the propeller requires corrosion resistance, high strength, and easy processing. At present, most of the materials are copper alloy, in addition to cast steel, cast iron, stainless steel, glass fiber reinforced plastic, nylon, nickel alloy, titanium alloy, etc. 1. High-manganese aluminum bronze is suitable for propellers with…

Propellers are divided into two categories: fixed pitch and variable pitch propellers. ① Fixed pitch propeller     Wooden propellers are generally fixed pitch. Its pitch (or blade installation angle) is fixed.     The blade installation angle suitable for low speed is too small at high speed; similarly, the installation angle suitable for high speed is too large…

Whether you are a fisherman who likes to relax on the water or a sports angler, you need a high-performance marine trolling motor. The maximum speed of the propeller is determined by the horsepower. The choice of four-stroke or two-stroke, etc., are all important considerations. Watching various boats trolling, please keep the following questions in…

There are two kinds of batteries for the electric boat engine, which are lead-acid battery and lithium battery. They have unique features from the perspectives of weight energy density, volumetric energy density, service life, price, applicability, national policy, etc. The current lithium battery energy density is generally 200-260 wh / g, lead acid is generally 50-70…

Many customers have written back that our motor quality is very good. The motor is very durable, and some have even been used for 5-6 years. Why can HK motors be used for such a long time? Every HK product has to go through dozens of tests before leaving the factory. Those tests include waterproof,…

In American, it has become a way of life to go kayaking to spend the weekend. A lot of kayaks are placed in the parking area, it looks spectacular. Kayaking is generally considered to be a very competitive competitive sport. In fact, it is also a leisurely outdoor project. Nowadays, many ordinary people, especially outdoor sports enthusiasts,…

If you like fishing, or water travelling, then you need an inflatable rubber boat. If you like to have breaks on the water in the day or night, an inflatable rubber boat makes you comfortable and safe. Also, the boat is a good tool for water sports. The material of PVC (polyvinyl chloride) has high performances…

The electric thrust trolling motor contains a sustainable rechargeable battery. Thrust motors running at different battery capacities are different in lasting and distance. Of course, there are many factors that affect electric trolling motor running. 1.Battery capacity First of all, the most direct factor is the battery capacity. If you use a large-capacity battery, the battery life…

The boat as a tool for human production and transportation, has been in existence for tens of thousands of years, and the world’s oldest boat, the primitive man’s canoe, is the ancestor of modern kayaking. Kayaking includes Kayak and Canoe. The original meaning of Kayak is the canoe of the Eskimo, and the Canoe is also a…

The outboard boat motor can be divided into different categories. The main products currently on the market are fuel-type and electric outboard boat motor. The fuel-based outboard engine converts the chemical energy of the fuel into mechanical energy, through the internal combustion engine, and then converts it into the kinetic energy of the boat by mechanical…