滑翔机是一种无动力飞行器，需要靠外力的协助，使滑翔机在空中随着气流变化而飞行。如果再加上人为驾驶或遥控，更能够让滑翔机像展翅的老鹰一样，无声无息地翱翔天空悠哉盘旋。
A glider is a plane that is not engine-powered. External force is needed for the glider to glide with the assistance of the air flow. When human-control is presence, it can allow the glider to glide like an eagle and sore through the sky.
橡皮筋弹力滑翔机本身除了没有动力之外，也没有任何操控与遥控功能，完全是靠弹射力让滑翔机在空中自由飞行。当滑翔机弹射离手之后，会快速爬升到顶点，并随着气流变化做出盘旋、滚翻、俯冲，展现出各式各样无法预测的飞行动作，最后降落地面。如果能够巧遇强劲的上升气流，就会飞得更高更远更久，这个在空中自由自在的飞行时间就是留空，所以弹力滑翔机留空的时间越长，就代表飞行能力越好。
The rubber-band powered glider not only have no power on its own, it also has no control ability. It uses the elastic force from the rubber band to convert into kinetic energy for the glider to fly and glide. When the glider is shot out, it quickly climbes to the maximum height, and glides with the air flow. It can also do stunts like vertical spinning, fall and climb again and many other amazing stunts before it reaches the ground. If its lucky enough to meet a strong upwards air current, the gliding time of the glider will increase, which also means that the ability of gliding is better.
在制造与弹射滑翔机时，可以从设计、制造、弹射的过程中，体验与学习到基本的飞行原理。而且必须从实际弹射过程中，为滑翔机做出适当的调整与修正，才能提高飞行性能。例如：机身前后平衡与机翼的升力，都关乎到滑翔机飞行性能，因此只要能够掌握弹射与调整技巧及气流动向，就可以让滑翔机达到最精采的飞行效果。
While making and playing the glider, simple flying concepts can be learnt through designing, hands-on and shooting. Also, slight adjustments are needed in reality to maximize the flying ability of the glider. Hence, as long as the shooting and adjusting techniques are familiarized, the glider would definitely produce a good result.
许多国家的社团与学校，经常有举办与滑翔机相关的比赛，而且规定必须是自己亲手制作的，当然能够自行设计的更好。不管机型、大小、材料，只要是符合参赛规则就能够与其他爱好者较量，看谁的滑翔机可以飞最远或是留空时间最长。
In many countries, many schools often organize events related to gliders and one of their ground rule is that they must make their own gliders. Regardless of model, size and material, as long as it goes with the competition rules, it is allowed to compete for the longest time in air.
自制滑翔机是一种多功能的活动项目，可以动脑设计、动手制造、动身弹射、动眼观察，绝对有别于网络上的游戏。可以单独弹射享受飞翔乐趣，也可以集合多人竞技，满足追逐飞行的梦想，也可以奠定飞行科学概念的基础，是一种不分国籍、种族、职业、性别、年龄都可以共享欢乐的健康活动，更是亲子共享制作与飞翔的好题材。
Self-making glider is a multi-purpose leisure activity. It allows people to think and design, hands-on making, exercise while shooting, and observe while glider is gliding. It is definitely different from internet games. This leisure activity can be done alone or in groups. It allow people to have basic knowledge towards flying as well as satisfy the dream of flying to certain people. Anyone can enjoy this leisure activity regardless of nationality, race, occupation, gender, and age. On a side note, it is also a good family bonding activity.
前 言
本书内含20种不同机型，采用材料都是我们常见的纸（200g）、竹签、雪糕棒、蓝丁胶，所以制作成本相当低廉。作者设计出刀锋式D形机翼，发挥纸张的可塑特性，大幅度简化了制作方法，有效达到伯努利流体力学（Bernoulli Fluid dynamics）的功能，这是本系列的最大特性，除了突破单片纸张的C形机翼，还比轻木及发泡材料的制作更加简单迅速与耐用，并且可以无限制地研发制作各类型与功能的滑翔机。
This book contains 20 different models of the gliders make using low budget materials like ： A4 paper 200g, bamboo sticks, icecream sticks, blu-tack. The author designed a knife-like D-Wings greatly simplified the procedures of glider making and also effectively used the Bernoulli''s Principle. This series not only breakthrough the single paper C-shaped wings, it is also easier to use and more lasting compared to light wood and bubbled material. And also, unlimited models of gliders can be made with the same materials.
读者可以从本书中复印各机型的展开图，按照书中图示和照片，并参阅文字指示说明制作。从最基本的机型R1开始逐一完成，过程可以学到基本制作技巧，还可以享有多种机型的弹射滑翔乐趣，而且在不断的练习制作下，技术就会更加纯熟、作品也会更加精湛。在享受弹射滑翔乐趣时，也可以从自制弹射飞机的各项调整中学到基本的飞行原理，不断提高滑翔机飞得更高、更远、更久的调控能力。
Readers is allowed to photocopy any design of the gliders, follow the steps in the pictures provided and make the gliders with reference of the instructions. Start off with the easiest Model R1. In the progress of making, many techniques of making can be learnt, and also, while enjoying shooting the gliders, different flying knowledge can be learnt too. With more practices, the product will be closer and closer to perfect.
本书中弹射滑翔机系列属于快速机，所以飞行速度快，飞行路径既高又远，因此适合户外宽敞的场地，尤其是在逆风爬升、顺风滑翔的情况下，不管风速大小都能出现丰富的飞行姿态，有别于其他慢速轻盈盘旋的滑翔机，尤其是在会产生上升气流的地形，更能提高滑翔机盘旋留空的效果。
This series of rubber-band powered gliders are speed gliders, thus their flying speed will be high and will be able to fly high and far. It is hence suitable for outdoors, especially when it is against the direction of wind, no matter the speed of the wind, it will still result in a nice flying style compared to the other models which are slow gliders.
纸张的优点是容易取得与制作，但是它的缺点是怕潮湿，所以弹射滑翔机时，必须在干燥的环境下进行。通常在正常的情况下弹射，一架滑翔机可以弹射百次以上，如果遇到撞击变形，只要用手捏回原状即可。若是不幸挂置在高处，绝对严禁试图冒险爬高取回，因为材料成本低廉，再制作就可以，而且还会越做技术越纯熟，就算是摔坏也不会心疼。
One plus point about paper is, that it is easier to purchase and made into gliders, however it cannot touches water. Thus when shooting the gliders, take note of the environment. The ground must be dry to prevent gliders being destroyed by the touches of water. If the gliders are shot correctly, it can have 100^ shots. In case the glider lost it shape, slight adjustments using hands will do. If the glider ever got stuck at a high location, do not climb to get it back, as the material used are very low budget, it would be safer and easier to make another one. At the same time, more practices will bring about more perfect glider.
要让滑翔机高飞，就必须有高效率的飞行条件，因为本系列滑翔机的制造工艺过程，还是会有小的误差存在，所以有可能会出现差强人意的飞行姿态，因此本书内容附有调整与修正的说明指示，可供玩家参考并做微调与修正，让滑翔机达到最高飞行效果。
To make the glider fly high, there must be high quality of flying. As any gliders may have their error in it which are not seen still, thus there might be chances for those error to happen and brought about disappointment in people. This book has the correct way to adjust the gliders, please follow those instructions to obtain a better result.
学习制作者可以依本书内容的指导步骤，从基本工法开始了解，然后逐一完成20种机型的制作。基本工法中分为认识线条功能、折叠法、安全使用刀具、黏合方法、各部件组合角度、机身制作、伯努利原理简介、飞行调整与修正、弹射法等。
Start learning from the Basic Craftwork to understand more about the techniques. Then, complete the 20 models one by one. Learn the basic techniques like ： folding, safety with penknife, sticking method, angle of different parts, making of the body, Bernoulli''s Principle Introduction, adjust methods, and the correct way to shoot.
每一机型均有展开图（彩色图与线条图）、成品照片、制作图示照片与说明等三部分。展开图是各机型的核心图稿，是提供制作前复印的母图，为了准确复印，请务必先将展开图剪下后，保持平整再进行复印，这样才不会出现线条弯曲的误差。
Every model of the glider has its own opened-design drawing color graph and line graph, completed picture, procedure of making with pictures. Opened-design drawing is the drawing of the different types of models. Please cut down the drawings and make sure it is flat before photocopying to ensure zero error is made.
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