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，受到多個人群的喜愛。那么你知道
大型航天模型作為一種可回收模型本身如何嗎？下面小編為您簡單講解幾句。
The space model, as its name implies, is a recyclable model made by imitating the shape of the spacecraft and is loved by many people. Do you know how the large-scale aerospace model itself is a recyclable model? Here is a brief explanation for you.
大型航天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。
Large space model belongs to aerospace model, which is a kind of unmanned aircraft for operation. Its power is model rocket motor, that is, a micro solid rocket motor. As most space models are rocket shaped, 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；它裝有使之安全返回地面的以便再次飛行的回收裝置；為確保安全，它的結構部件須由非金屬材料制成。
In other words, the model rocket refers to an aviation model that does not use aerodynamic lift to overcome gravity, but is propelled by the model rocket engine; It is equipped with a recovery device to enable it to return to the ground safely for re flight; To ensure safety, its structural components 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，設計和制做模型火箭需要多方面的知識，如空氣動力學、火箭飛行力學等。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洞試驗，確定火箭佳外形；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 can fly in the atmosphere only when it is propelled by the model rocket engine. Therefore, the design and manufacture of model rockets require knowledge of many aspects, such as aerodynamics, rocket flight mechanics, etc. The stability of the model rocket in the air and the air resistance to it should be studied; To 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; Carry out static performance test of model rocket engine, measure thrust and working time, and calculate total impulse.
在發(fā)達國家的一些高等學校里，在理工科有關的課程上，甚至一些中學的物理課上，教師們經常以模型火箭作為講課的題材，并在此基礎上指導學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 the courses related to science and engineering, and even in the physics classes in some middle schools, teachers often use model rockets as the subject matter of lectures, and on this basis guide students to carry out some research projects and make model rockets.
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