Science and Technology Small Production Training Experimental Material Equipment Yihang Name Ship Model Aircraft Primary and Secondary School Training STEM Science 科技小制作培训实验材料器材亿航名轮船航模中小学培训STEM科学

Model Number: KX1344
Product name: “Yihang” Rope-Threading Drone
Product dimensions: 190*100*80 mm
Weight per unit: 0.65 Kg
Packaging Quantity: 200
Box specification dimensions: 600*450*550 mm
Product knowledge principle: In summer, children often go to parks to play rowing, but these boats are different from previous methods of rowing. Most boats in parks today are cute foot-propelled boats that offer comfortable and convenient use. In fact, their design is based on the steamship. Let’s learn about the steamship through an experiment.

1. Understand the composition and structure of the name ship
2. Apply the learned theoretical knowledge to real life.

Ships propelled by illuminated wheels; the original illuminated steamships were propelled by human effort using wooden wheels.
A steamship is a vessel propelled by a steam wheel propeller; it was an early type of mechanical power ship. It evolved from ancient Chinese wheeled ships.
After modern times, the steam engine was used on ships to serve as propulsion, and the driving device used in conjunction with the steam engine is the paddle wheel. It consists of blades attached around the outer edge of a rotating wheel, forming a rotatable paddle wheel, which is installed on both sides or at the stern of the ship.
According to the placement, the midship wheels are divided into midship wheels on the side and midship wheels at the stern.

Introduction to Principle Knowledge
The shaft connecting the bright wheel is fixed to the return gear within the gearbox. When the pull cord of the gearbox is pulled, elastic potential energy is generated. Once the grip is released, the return gear in the gearbox releases this potential energy through the shaft, causing the bright wheel to rotate. The elastic potential energy is converted into kinetic energy, which makes the paddle wheel spin and thus drives the bright boat to move.

elastic potential energy
The various parts of an object that undergoes elastic deformation possess potential energy due to the mutual action of elasticity; this type of potential energy is called elastic potential energy. Within a certain range, the greater the deformation of the same elastic object, the more elastic potential energy it has; conversely, the less it does. In engineering, it is also referred to as elastic deformation energy. For example, compressed gas, a wound spring, and a stretched or compressed spring all possess elastic potential energy, and elastic potential energy can be directly converted into kinetic energy.

Knowledge Expansion
The Minglun propeller takes a step forward compared to propulsion devices such as stilts, oars, and paddles. Its main feature is that it can operate continuously, converting human or mechanical force into ship propulsion force to move the vessel forward.

However, it has a bulky structure and low efficiency. Especially when exposed to wind and waves, part or all of the propeller blades emerge above the water, preventing the ship from navigating smoothly. Moreover, the propeller blades are prone to damage during use. When the propeller rotates, half of the blades are in the air, which not only increases the ship’s width and resistance during navigation but also increases the risk of collisions with other ships when it stops at a dock. This affects its own safe operation and also poses a possibility of damaging other ships. Additionally, if vegetation or similar objects wrap around the propeller blades or shaft, the propeller may lose its ability to rotate.

It was precisely the drawback of the Minglun propeller that, in the 1860s, the Minglun ships were replaced by more advanced steam ships equipped with propellers.