按照航模運動的項目來區(qū)分，可以分為：自由飛類、線操縱類、無線電遙控類。國際航空聯(lián)合會（FAI）將這三類模型分別編號為F1、F2、F3。這三類模型又各自設(shè)有其子項目。

　　According to the projects of model flight, it can be divided into: free flight, line control, and wireless remote control. The International Federation of Aeronautics (FAI) has designated these three types of models as F1, F2, and F3, respectively. These three types of models each have their own sub projects.

　　而我們主要接觸的航空模型主要是無線電遙控類的，包括無線電遙控固定翼和無線電遙控直升機。

　　And the aviation models we mainly deal with are radio controlled, including radio controlled fixed wings and radio controlled helicopters.

　　自由飛類（F1）

　　Free flying class (F1)

　　自由飛模型總的特點是：模型飛機在飛行過程中，不能進(jìn)行人為地操縱與控制；但模型飛機可按照起飛前設(shè)置或調(diào)整好的姿態(tài)和軌跡飛行。?這類模型大多為安定性非常好的滑翔機。由于不可操縱，模型飛機遇到氣流飛丟的情況很常見。自由飛模型可細(xì)分為：?F1A牽引模型滑翔機?、F1B橡筋動力模型滑翔機?、F1C活塞式發(fā)動機滑翔機?、F1D室內(nèi)模型飛機。自由飛模型

　　The general characteristic of the free flight model is that the model aircraft cannot be manually manipulated and controlled during flight; But the model airplane can fly according to the attitude and trajectory set or adjusted before takeoff.? Most of these models are gliders with excellent stability. Due to its non manipulability, it is common for model aircraft to experience turbulence and fly away. The free flight model can be subdivided into:? F1A towed model glider? 、 F1B rubber powered model glider? 、 F1C piston engine glider? 、 F1D indoor model aircraft. free flight model

　　線操縱類（F2)線操縱類模型飛機共有的一個特點就是以內(nèi)燃機發(fā)動機或電動機做動力，通過很細(xì)長的操縱線（一般是兩根）控制模型飛機的升降舵，對模型飛機的俯仰動作進(jìn)行人為的操縱與控制。

　　A common feature of F2 line control model aircraft is that they use internal combustion engine or electric motor as power, and control the elevator of the model aircraft through very thin control lines (usually two) to manually manipulate and control the pitch motion of the model aircraft.

　　因此這類模型飛機只能以操縱者為軸心，在一個半球面的空間內(nèi)飛行。線操縱模型可細(xì)分為：F2A線操縱競速模型飛機?、F2B線操縱特技模型飛機?、F2C線操縱小組競速模型飛機?、F2D線操縱空戰(zhàn)模型。線操縱模型

　　Therefore, this type of model aircraft can only fly in a hemispherical space with the operator as the axis. The line manipulation model can be subdivided into: F2A line manipulation racing model aircraft? 、 F2B line manipulation stunt model airplane? 、 F2C line control team racing model airplane? 、 F2D line manipulation air combat model. Line manipulation model

　　無線電遙控類（F3）這種模型飛機是由操縱者通過無線電遙控系統(tǒng)操控其飛行。由于它的操縱系統(tǒng)與飛行性能最接近真飛機，因此在航模愛好者中的擁護(hù)率最高。這類模型飛機的子項目很多，且每個項目間差異很大。?這類模型可細(xì)分為?：

　　The F3 model aircraft is controlled by the operator through a radio remote control system to fly. Due to its control system and flight performance being closest to real aircraft, it has the highest popularity among model airplane enthusiasts. There are many sub projects for this type of model airplane, and there are significant differences between each project.? Can this type of model be subdivided? ：

　　F3A無線電遙控特技模型飛機?

　　F3A radio controlled stunt model airplane?

　　由操縱者通過無線電遙控系統(tǒng)，控制模型飛機做出各種規(guī)定的特技動作。裁判員根據(jù)完成動作的質(zhì)量評分。這個項目具有一定設(shè)計、制作模型的樂趣；且能夠充分發(fā)揮模型飛機的特技性能；對運動員的操縱技術(shù)要求很高；另外，該項目觀賞性極強，擁有“空中芭蕾”的美譽。

　　The operator controls the model aircraft to perform various prescribed stunt actions through a wireless remote control system. The referee scores based on the quality of the completed action. This project has a certain level of fun in designing and making models; And it can fully utilize the stunt performance of the model aircraft; High demands are placed on athletes' manipulation skills; In addition, the project has strong ornamental value and is known as the "air ballet".

　　可以說，F(xiàn)3A集技術(shù)性、挑戰(zhàn)性和觀賞性為一體，是最具魅力的國際流行項目之一，人氣指數(shù)非常高。

　　It can be said that F3A combines technical, challenging, and ornamental elements, making it one of the most charming international popular projects with a very high popularity index.

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