模型飞机运动,现在各城市的中学小学中普遍的展开了,这是一个很富有科学教育意义的运动。现在我讲一点和模型飞机设计有关的力学知识,供给爱好模型飞机制作的同志们参考。我们在设计一架模型飞机的时候,常常考虑到其各部的比例是否妥当,其安定与重量是怎样,而对其力学的基本原理每易忽略,这样往往造成一架模型的失败。故设计时,对力学知识的概念,不可不事先了解清楚。下面叙述模型飞机四种基本力源的概 The model aircraft movement, which is now commonly carried out in middle schools and elementary schools in various cities, is a science-educational movement. Now I will talk about mechanics related to the design of model airplanes and provide reference for comrades who are interested in model airplane production. When designing a model airplane, we often consider whether the proportions of its various departments are appropriate, and how its stability and weight are. The basic principles of its mechanics are easily overlooked, which often results in the failure of one model. Therefore, when designing, the concept of knowledge of mechanics must be understood in advance. The following describes the basic model of the four basic sources of force