Dear Sir/Madam, PAKTAT TOYS delightfully announces that all staff is going to take a big vacation from Jan 30th to Feb 9th,2022 for our most extraordinary Chinese New Year. And we are going to get back to work as normal on Feb 10th,2022.Thank you for your mutual cooperation and support. Simultaneously, great wishes and health will be brought to your families on the bottom of our hearts.AngelaPAK TAT INDUSTRIAL CO.PAK TAT INDUSTRIAL（HK）LIMITEDSHANTOU PAK TAT FUNG TRADING LIMITED
The shell of RC toy cars is generally made of PVC and injection molded.PVC material adopts blister technology, and the characteristics of blister are as follows:1) Plastic raw materials expand by heat, and the coefficient of linear expansion is much larger than that of metals; 2) The rigidity of general plastic materials is one level lower than that of metals;3) The mechanical properties of plastic raw materials will decrease significantly under long-term heating;4) Generally, plastic materials will undergo permanent deformation if they are subjected to long-term stress at room temperature and under stress below their strength;5) Plastic raw materials are very sensitive to notch damage;6) Generally, the mechanical properties of reinforced plastic raw materials are anisotropic;7) Also some plastic materials will absorb moisture and cause size and performance changes;8) The mechanical properties of plastic raw materials are usually much lower than that of metals, but some composite materials have higher specific strength and specific modulus than metals. If the product design is reasonable, it will be more advantageous;
2 WD is 2 wheel drive system. Corresponding to it is the "4 wheel drive" (as the name implies, all 4-wheels of a car can get driving force).There are two situations for 2WD cars system: front-drive & rear-drive.1) Front-wheel drive means that the front wheel of the car is the driving wheel. The advantages of the front-wheel-drive vehicle under the same displacement are the effective output of kinetic energy, low fuel consumption, strong power, small size, large interior space, lightweight, Compact structure, low failure rate, high driving speed, etc. Front-wheel drive vehicles are generally used in small cars that are expensive and require a lot of space.2) Rear-wheel drive means that the rear wheel of the car is the driving wheel. The advantages of the rear-wheel-drive vehicle under the same displacement are good load-bearing, simple structure, convenient maintenance, good handling performance, etc. Therefore, rear-drive vehicles are generally used for large and medium-sized freight and passenger vehicles with large volumes and large cargo capacity.The four-wheel safety system (4wd system) is to change the 2wd system driving force of the engine from the 2WD to the 4WD. The reason why the 4wd system is included in the active safety system is mainly that the 4wd system has better engine driving force application efficiency than 2wd, and achieves better tire traction and effective use of steering force.In terms of safety, the 4wd system has a better application of tire traction and steering, resulting in good driving stability and tracking. In addition, the 4wd system has more off-road features that 2wd does not have.Part-time 4WDThis is a four-wheel-drive system that the driver can manually select between two-wheel drive and four-wheel drive. The driver can switch the two-wheel drive or four-wheel drive mode by turning on or off the transfer case according to the road conditions. This is also the most common driving mode for general off-road vehicles or four-wheel drive SUVs.Full-time 4WDThis transmission system does not require the driver to choose and operate. The front and rear wheels always maintain the 4WD mode. The engine output torque is set at 50:50 on the front and rear wheels when driving so that the front and rear wheels maintain the same amount of torque. The full-time drive system has good driving control and driving track. With the full-time four-wheel-drive system, you can drive smoothly on paved roads. But its shortcomings are also obvious, that is, it consumes more fuel and is not economical enough. Moreover, the vehicle does not have any device to control the difference in tire speed. Once a tire leaves the ground, it will often stop you there and cannot move forward.But now, with the development of technology, the problem of all-wheel drive has been solved. The application of the electronic differential lock enables the full-time 4WD off-road vehicle to brake on the suspended wheel when one wheel is suspended, so that the power can be transmitted to other wheels that are still in contact with the ground, thereby ensuring the power output.Real-time 4WDVehicles with a timely drive system can be controlled by a computer to select a drive mode suitable for the current situation. On normal roads, vehicles generally use the rear-wheel drive. In the event of a bad road or slipping of the driving wheels, the computer will automatically detect and immediately distribute the engine output torque to the two front wheels and naturally switch to the four-wheel-drive state. The application is simpler than eliminating the driver’s judgment and manual operation. Its fuel economy has been greatly improved, and it can cope with roads and off-roads freely.
I believe that every person who loves a car knows more or less some information about his car, such as a four-wheel-drive system, suspension form, acceleration ability, and so on. However, the mysterious parts such as the chassis, suspension, power, transmission, etc. They are all hidden under the body. We rarely have the opportunity to witness their working status. Today we could through the assembly of the RC model and show you how these components work.Chassis: Strictly speaking, the RC model chassis in the picture is a non-load-bearing body structure.What are a non-load-bearing body and a load-bearing body? Non-load-bearing body refers to a body structure that can be assembled separately from the car frame and body connected by soft materials or springs;As the name implies, a Load-bearing body is carrying the engine and chassis as a whole through the body itself, and it both with the function of the frame, the cars and most urban SUVs in our daily life use this body structure.Shock absorber: It plays a vital role for the vehicle. The picture of the RC model shock absorber works the same as our real car. The shock absorber is mainly divided into two parts, spring, and damper, which can also be called a damping cylinder.Spring: In simple terms, the main function of the spring is to support the function of the vehicle. Its strength affects the support of the vehicle and the speed of the shock absorber's rebound speed, and the damper will have a greater impact on the dynamic stability of the vehicle. We know that the spring will vibrate and extra bounce after completing a damping process. If there without a damper to suppress these actions, the stability of the vehicle will be greatly affected. Damper: The working principle of the damper is to move up and down the valve with small holes in the barrel to force oil with different viscosity to pass through the small holes to form damping. The damping coefficient can be adjusted by the viscosity of the oil.Swingarm system: The swingarm usually forms a complete suspension system with the shock absorber. We can intuitively see their combination on the RC model, but compared to our real vehicle, the RC model does not need to consider the problems with the layout of the space such as the riding space and the engine. Therefore, the space left for the entire suspension system is very abundant, and the design of the swingarm and the connecting rod can be made very sturdy for enhancing the performance.Power system-motor, battery, ESC, transmissionOur traditional fuel energy vehicles are basically composed of engines, gearbox, and transmission systems, while electric vehicles are composed of motors, gearboxes, electronic controls, batteries, and transmission systems.Our RC model uses a larger motor compared to the body of a real electric car, so in terms of power source, one is a multi-motor layout to ensure cabin space, and the other is uses the large-scale single-motor layout for an electronic control system simplicity.Gearbox: If you have a better understanding of electric vehicles, you will often find that electric vehicles basically use a single-speed gearbox, that is a fixed gear ratio gearbox. Fully consistent with our RC model, we can intuitively see what the wave box on the RC model looks like. Of course, the fixed-gear ratio gearbox on a real car will increase the number of gears to provide a higher reduction ratio, but the overall working principle is the same.In conclusion, the real car seems complex but also has many similarities with our RC model. Through the assembly of the RC model, we can appreciate how much the development of technology has made for our travel and entertainment. Those who love the beauty of machinery can enjoy it in a simpler way.