“飞机升力演示器”是根据小学自然第三册第十七课教学的需要设计制作的。教学生认识升力是怎样产生的,是本课教学的重点和难点。由于学生对这方面的内容缺乏感性认识,而我们又不可能带学生去进行实际观察,怎样使学生能在课堂上观察到“升力”以及飞机升力的产生与哪些因素有关 The “Aircraft Lift Demonstrator” is designed and produced according to the needs of the teaching of the seventh volume of the third volume of primary school. Teaching students to know how the lift is produced, is the focus of this lesson and difficult. Because of the lack of perceptual knowledge of students in this area, and we can not bring students to observe the actual situation, how to enable students to observe in the classroom, “lift” and the aircraft lift and what factors