Product Code: FJ995
Product Name: J-15
Packing: 96PCS
Specification: Approx. 38mm * 13mm * 43mm
Weight: About 200g
Color: Mixed colors
Is the device powered by batteries? Yes.
Box Specification: 102*41.5*77

Preface: The J-15 (English: J-15, Chinese nickname: Flying Shark "Fēishā", English: Flying Shark, NATO designation: Flanker-D, English: Flanker-D) is a single-seat, twin-engine carrier-based fighter jet developed and developed based on the domestic J-11 fighter jet based on the prototype of the Su-33 fighter jet obtained from Ukraine. The J-15 is classified as an improved model of the fourth-generation fighter jet, that is, a semi-fourth-generation fighter jet.

The purpose of the experiment: To enable children to learn more knowledge and improve their own practical ability through the fun of playing games.

Principle Application: Aircraft rise by means of parallel thrust, and a good hand-thrown flight trajectory should be a beautiful arc. Many people mistakenly throw the aircraft into the air with a high angle of attack, which is actually very easy to stall and makes it fly further.

Experimental Cognition: The ascent of an aircraft is based on the Bernoulli Principle. The wings are designed with an arc on top and a flat or concave shape on the bottom, so when the wing moves forward, the airflow on top is faster than that on the bottom. According to the Bernoulli's Principle of fluid dynamics, the air below will exert a pressure on the air above, which is the lift of the wing, supporting the aircraft and allowing it to fly in the air.
Flying kites also rely on the fundamental principles of airplanes, but they provide thrust by throwing them forward with their hands.

Knowledge Expansion: According to the law of conservation of energy, energy cannot disappear nor be created from nothing; it can only be transformed from one form to another. In low-speed airflow, the energy involved in the conversion is only pressure energy and kinetic energy. Air of a certain mass has a certain pressure that can push objects to do work; the greater the pressure, the greater the pressure energy; air in motion has kinetic energy, and the greater the flow velocity, the greater the kinetic energy.

Knowledge extension: The airflow speed is only due to the action of the propeller on the air by the engine, and of course, from this analysis, energy is also conserved.

Warning:

This product contains accessories that are all student experimental equipment. Please use it under the supervision and guidance of the teacher and parents to ensure safety! All products are prohibited from consumption! Not suitable for children under the age of three to use, please do not approach the source of fire. If you use batteries, please check the circuit before assembly to ensure that it is unimpeded, the components on the circuit are complete, and the contacts are good. The + on the battery is positive, and the - is negative. Pay attention to the assembly process, if you use glue, do not get it into your eyes or skin.