Product name：KX1965 脚踩火箭炮
货号：KX1965
"Size"：305*228*90mm
Weight：about500g
Material：气压Launch器1a、Rocket missile2a、Rocket placement platform1a
颜色：混色
是否使用电池:否
装箱：50 pcs
Box gauge：600*450*550mm

火箭软弹安置在火箭Launch器上，Then you can inflate it by pressing it with your hand or foot—Launch，火箭就会急速向天控Launch
射程可达200ftabout6meter

Rocket propulsion theory is one of the foundations of aerospace theory。火箭Engine是一种推进工具，It can provide powerful power，Enable the spacecraft to reach the required cosmic velocity。Its operation is based on the principle of direct reaction motion，This principle is particularly conducive to high-speed navigation。
So什么是直接反作用运动呢？
According to the fundamental laws of Newtonian mechanics，两aInteracting objects，Its action force and reaction force always exist simultaneously，Their sizes are equal，Opposite directions。Therefore，Any kind of movement，Broadly speaking，All are reaction movements。举两a例子：The first one is the ship，Because the impellers of the ship act on the water，The reactive force of water propels the ship forward；The second is jet.（"Airplane"）Engine，Due to the combustion of fuel in the engine，The expanding gas is ejected backward at high speed，Engine便得到与燃气喷出Opposite directions的推力而向前运动。

Experimental purpose：

1.Understand the structure of the foot-mounted rocket cannon car
2.Understand the operating principle of foot-mounted rocket launchers
3.Stimulate children's thirst for knowledge，Shape the spirit of scientific exploration，Exercise hands-on operation skills，Further cultivate children's ability to identify problems、Independent exploration、Comprehensive ability to solve problems

Principle application：

The foot-operated rocket launcher utilizes the principle of gas compression，And the principle that a gas explosion occurs when gas rapidly accumulates in a confined space，Make the rocket launcher in your foot spray into the air。Let students understand the characteristics of acids and bases from it，Truly achieve education through entertainment。According to the fundamental laws of Newtonian mechanics，两aInteracting objects，Its action force and reaction force always exist simultaneously，Their sizes are equal，Opposite directions。Therefore，Any kind of movement，Broadly speaking，All are reaction movements。举两a例子：The first one is the ship，Because the impellers of the ship act on the water，The reactive force of water propels the ship forward；The second is jet.（"Airplane"）Engine，Due to the combustion of fuel in the engine，The expanding gas is ejected backward at high speed，Engine便得到与燃气喷出Opposite directions的推力而向前运动。

Experimental cognition：

There is no difference between the two kinds of sports，They all move under the impetus of the reaction force。But，From the perspective of the characteristics of the reaction force generation，There is a difference between the two：在第一a例子中，The engine itself cannot cause movement，它仅是aEnergy，If there is an engine on the ship but no impeller，So，Engine的功率再大，Boats are also unable to move。Therefore，除了Engine（Energy）outside，有着一a介于Engine和outside界某物体（Such as本例中的水）The intermediate mechanism between them，它与outside界某物体相互作用，The well bears the reaction force thus generated。This kind of intermediate institution，通常称为Thruster（As in this example, the impeller）；在第二a例子中，There is no intermediate institution.，推力是由燃气对Engine本身的反作用产生的。We refer to the former type of motion as indirect reaction motion，The latter type of motion is called direct reaction motion。Of course，There are also hybrid types where direct and indirect reaction movements coexist，Such as：Turboprop engine，Part of the engine energy is transferred to the propeller（Thruster），Another part，Then a direct reaction movement of the gas flow is generated。
Jet propulsion belongs to direct reaction motion。So什么是喷气推进呢？The substance is ejected from the object being pushed in the form of gas，This propulsion method is called jet propulsion。
The substance ejected by jet propulsion is called propellant；利用喷气推进产生推力的Engine，It is called a jet engine.。When exercising，Interacting objects，一a是Engine本身，另一a是从它内部喷出的高速气流。高速气流产生的反作用力作用于Engine本身，The direction is opposite to that of the airflow，This is thrust.。

Knowledge expansion：
喷气Engine分为两大类：





一是空气喷气Engine，它是利用大气来产生喷气射流的喷气Engine。For example：Use oxygen in the atmosphere as an oxidant，Burning fuel generates a gas jet；Or heat the air in a nuclear heat exchanger，Then it is discharged through the nozzle；
二是火箭Engine，It is a jet engine that carries all the ejected substances by itself。For example：It contains oxidants and combustion agents to generate gas jets。

火箭Engine所达到的推力和速度远远超过了一般的推进方法。这种Engine不依赖周围介质条件，It can also work in a spatial environment，This feature，It ensures that at different flight speeds，The thrust generated by the engine is not affected by the air acceptance capacity，But it is constant.，This also makes the rocket（Engine）所能达到的飞行速度比其它任何类型Engine要高得多；Secondly，Because it is a direct reaction motion，There is no intermediate institution.，There is no moving mechanism in the main injection channel that limits the working temperature，This determines that the structure of the rocket engine is simple，However, the thrust generated is very large

Knowledge extension

In ancient times, fire igniters were attached to the heads of bows and arrows，An arrow that is then shot at the enemy and causes them to burn。《Three Kingdoms志·wei书·The Annals of Emperor Ming》“ Zhuge Liang's Encirclement Chen Cang ， Cao Zhen General Dispatch Fei Yao To be rejected”Pei Songzhi's annotation Three Kingdoms wei Yuhuan 《wei略》：“ zhao （郝zhao）So a rocket was shot back at his ladder，Ladder fire，All the people on the ladder were burned to death。” Song Sima Guang《"Su Shui Ji Wen》Volume Twelve：“Prefect Miao Jixuan ，Pat mud on 藳，Prepare rockets to shoot at the enemy。”Qing Dynasty Gu Yanwu《The conduct of Qian Jun, the governor of Ruzhou》：“The thief shot a rocket at the city，From the city head to ðª¿。
Safety Warning：

All the accessories in this product are special equipment for student experiments and production，Please ensure safety under the supervision and guidance of teachers and parents Use it all below！All products are prohibited from consumption！Not suitable for children under three years old，Do not press near the fire source。Such as果用到 Please check whether the circuit is unobstructed before assembling the battery、Whether the accessories on the circuit are complete，Whether each contact is good or not good，On the battery+It is the positive pole、-It is the negative pole，组装过程中注意Such as果用到胶水不要弄到眼睛和皮肤上。