航天模型，顾名思义是仿航天器外形制作的一种可回收模型，隶属于航空航天模型，是供运动用的一种不载人的飞行器，其动力为模型火箭发动机，即一种微型固体火箭发动机。由于航天模型多呈火箭状，故通称模型火箭。

The aerospace model, as the name suggests, is a recyclable model made in the shape of a spacecraft. It belongs to the aerospace model and is a non manned aircraft used for operation. Its power is the model rocket engine, which is a type of micro solid rocket engine. Due to the fact that many aerospace models are rocket shaped, they are commonly referred to as model rockets.

换句话说，模型火箭是指不利用气动升力去克服重力，而是靠模型火箭发动机推进升空的一种航空模型；它装有使之返回地面的以便再次飞行的回收装置；为确保，它的结构部件必须由非金属材料制成。 模型火箭虽小，然而它要靠模型火箭发动机推进才能在大气中飞行。因此，设计和制做模型火箭需要多方面的知识，如空气动力学、火箭飞行力学等。

In other words, a model rocket refers to an aviation model that does not use aerodynamic lift to overcome gravity, but instead relies on a model rocket engine to propel it into space; It is equipped with a recovery device that allows it to safely return to the ground for further flight; To ensure safety, its structural components must be made of non-metallic materials. Although the model rocket is small, it relies on the propulsion of the model rocket engine to fly in the atmosphere. Therefore, designing and manufacturing model rockets requires a variety of knowledge, such as aerodynamics, rocket flight mechanics, etc.

要研究模型火箭在空气中飞行的稳定性和空气对它的阻力；要分析火箭的飞行轨迹，计算它的飞行高度；有条件时，还可以对模型火箭进行风洞试验，确定火箭外形；进行模型火箭发动机静态性能测试试验，测量推力和工作时间，计算总冲量。

To study the stability of model rockets flying in the air and the resistance of the air to them; To analyze the flight trajectory of a rocket and calculate its altitude; When conditions permit, wind tunnel tests can also be conducted on the model rocket to determine the optimal shape of the rocket; Conduct static performance testing tests on model rocket engines, measure thrust and operating time, and calculate total impulse.

在发达的一些高等学校里，在理工科有关的课程上，甚一些中学的物理课上，教师们经常以模型火箭作为讲课的题材，并在此基础上指导学生开展一些课题研究和模型火箭的制作。

In some higher education institutions in developed countries, teachers often use model rockets as the subject matter for lectures in courses related to science and engineering, and even in physics classes in some high schools. Based on this, they guide students in conducting research projects and making model rockets.