Item Number: FJ1002
Product Name: Dragon
Packing: 200PCS
Specification: Approximately 35mm*9mm*32mm
Weight: Approximately 200g
Color: Mixed color
Whether to use a battery: Yes
Box specification

Preface: The dragon is an animal in ancient Chinese mythology and is the leader of scale insects. The dragon is the most important totem of the Chinese nation. The Chinese people are descendants of the dragon and regard it as a symbol of civilization and a spiritual totem. It is said that dragons can fly, transform and summon wind and rain, and are regarded as auspicious signs along with phoenixes and qilins.

The purpose of the experiment is to enable children to acquire more knowledge and develop their hands-on abilities through game entertainment.

Principle application: Aircraft glide by parallel propulsion. A good hand-thrown flight trajectory should be a beautiful arc. Many people mistakenly throw the aircraft at a large Angle into the air and then glide. In fact, it is very easy to stall and not fly far.

Experimental cognition: The takeoff of an aircraft is based on Bernoulli's principle. The wing is made in a geometric shape with an arc at the top and a plane or concave at the bottom. In this way, when the wing moves forward, the air flow rate at the top is faster than that at the bottom. According to Bernoulli's fluid mechanics principle, the air at the bottom will exert a pressure on the top, which is the lift force of the wing, lifting the aircraft and allowing it to fly in the air.
Hand-thrown aircraft also cannot do without the basic principles of an aircraft; it merely relies on the hand to throw forward to provide thrust for the aircraft

Knowledge expansion: According to the law of conservation of energy, energy neither disappears nor is created out of nothing; it can only be transformed from one form to another. In low-speed flowing air, the energy involved in the conversion is only pressure energy and kinetic energy. A certain mass of air has a certain pressure and can push objects to do work. The greater the pressure, the greater the pressure energy. Flowing air has kinetic energy. The greater the flow rate, the greater the kinetic energy.

Knowledge extension: The flow rate of air only comes from the effect of the propeller carried by the engine on the air. Of course, analyzing energy from this perspective is also balanced.

Warning

All the accessories in this product are student experimental production equipment. Please use it under the supervision and guidance of teachers and parents to ensure safety! All products are prohibited from consumption! Not suitable for children under three years old. Do not press near fire sources. Before assembling the battery, please check whether the circuit is unobstructed, whether the accessories on the circuit are complete, and whether all the contacts are in good contact. On the battery, + indicates positive and - indicates negative. During the assembly process, be careful not to get glue on your eyes or skin if it is used.