航天模型，顧名思義是仿航天器外形制作的一種可回收模型，隸屬于航空航天模型，是供運動用的一種不載人的飛行器，其動力為模型火箭發(fā)動機，即一種微型固體火箭發(fā)動機。由于航天模型多呈火箭狀，故通稱模型火箭。
Aerospace model, as the name suggests, is a recyclable model made by imitating the shape of spacecraft. It belongs to aerospace model. It is a non manned aircraft for operation. Its power is model rocket motor, that is, a micro solid rocket motor. Because most Aerospace models are rocket like, they are generally called model rockets.
換句話說，模型火箭是指不利用氣動升力去克服重力，而是靠模型火箭發(fā)動機推進升空的一種航空模型；它裝有使之返回地面的以便再次飛行的回收裝置；為確保，它的結(jié)構(gòu)部件必須由非金屬材料制成。
In other words, model rocket refers to an aviation model that does not use aerodynamic lift to overcome gravity, but relies on model rocket engine to promote lift off; It is equipped with a recovery device to safely return to the ground for re flight; In order to ensure safety, its structural parts must be made of non-metallic materials.
模型火箭雖小，然而它要靠模型火箭發(fā)動機推進才能在大氣中飛行。因此，設(shè)計和制做模型火箭需要多方面的知識，如空氣動力學(xué)、火箭飛行力學(xué)等。要研究模型火箭在空氣中飛行的穩(wěn)定性和空氣對它的阻力；要分析火箭的飛行軌跡，計算它的飛行高度；有條件時，還可以對模型火箭進行風(fēng)洞試驗，確定火箭更佳外形；進行模型火箭發(fā)動機靜態(tài)性能測試試驗，測量推力和工作時間，計算總沖量。
Although the model rocket is small, it depends on the propulsion of the model rocket engine to fly in the atmosphere. Therefore, designing and making a model rocket requires a variety of knowledge, such as aerodynamics, rocket flight mechanics and so on. To study the stability of the model rocket flying in the air and the resistance of the air to it; Analyze the flight path of the rocket and calculate its flight altitude; When conditions permit, wind tunnel tests can also be carried out on the model rocket to determine the best shape of the rocket; The static performance test of model rocket engine is carried out, the thrust and working time are measured, and the total impulse is calculated.
在發(fā)達的一些高等學(xué)校里，在理工科有關(guān)的課程上，甚一些中學(xué)的物理課上，教師們經(jīng)常以模型火箭作為講課的題材，并在此基礎(chǔ)上指導(dǎo)學(xué)生開展一些課題研究和模型火箭的制作。
In some colleges and universities in developed countries, in science and engineering related courses, and even in physics classes in some middle schools, teachers often take model rockets as the subject matter of lectures, and guide students to carry out some subject research and model rocket production on this basis.
