蓝天的向往——航模涡轮喷气发动机完全制作手册来源：王中扬的日志1.发动机如何自己设计？到哪里找材料，价钱如何？Small gas turbines are not scaled down large engines. Any attempt to do so is likely to fail. Kurt Schreckling is to becommended for his original approach to the design of small engines as set out in his book on the FD3 64.He carried out thetherorectical considerations and came to the conclusion that a simple radial compressor and turbine wheel with a singleannular combustion chamber would produce the best results. His views have been confirmed by the rapid progress in refiningthe designs and extracting more power from the same basic size. Spreadsheets have been developed by a number of peoplebased on the Formulas in the Schreckling and Kamps books that model the processes that go on in the engine. The GTBA hasalso commissioned burst analysis of the turbine wheel.小型燃气涡轮机不是比例缩减大型引擎。
任何试图这样做很可能失败。
库尔特Schreckling他最初的方法来表扬的设计已小引擎在他的书放在了FD3 64。
他进行了therorectical考量和得出结论:一个简单的径向压缩和涡轮方向盘,与单一环形燃烧室会产生最好的结果。
他的观点已经被证实在快速进步、精制设计和提取更多的力量从相同的基本尺寸。
试算表而形成的一批人基于经验公式和Kamps书籍的Schreckling模型上的过程引擎。
这GTBA已经分析也任命破裂汽轮机轮。
英文来自（GTBA-英国涡轮发动机制作联盟)模型用的发动机不是大的发动机的按比列缩小，任何试图这样做都很可能是失败。
值得推荐的是英国人-Kurt Schreckling设计的FD3-64航模涡喷发动机的设计，开创了小型发动机设计先河，用一个简单方法制作的放射式压气机，环型燃烧室，一个用简单方法制做出来的涡轮，达到了良好的效果。
他的理念已被最新改进的各种新的设计所证实，并且都是以他的设计为基础进行的提炼。
数字显示，许多爱好者根据他的著作理论，成功地将发动机用在了航模上。
涡轮喷气发动机材料为不锈钢为主，材料成本很低，如果从材料本身的价值来说，以广州为例，也就100元上下，但由于个人爱好者，有些可能无机床，氩弧焊的话，到外面加工的人力成本会贵过材料费。
但也无妨。
再就是如果有认识不锈钢加工厂的话，找到边角料足矣做一台涡轮,如果你想省事些，可以用涡轮增压器上的压气轮来代替木头的压气轮。
2.涡轮容易加工吗,没专业设备如何做动平衡？涡轮是由型号为301,2.5mm不锈板剪口弯成，用一个小电钻配小砂轮可以打磨出翼型即可，关键的动平衡测试，记住这一点很重要！！否则会导致发动机解体！！是用我们的大拇指与食指来感觉振动。
灵敏度相当高。
足以完成涡轮的动平衡调试。
3.散热与轴承问题BearingsThe compressed air in the chamber passes down the bearing tube and exits both ends to provide cooling to the bearings. Thebearings are simple ball races and they are oiled with oil mist supplied buy the pressure from the engine itself. Very low flowsof oil are better than a constant flow as the drops can cause the ball to skid in the raceways. Turbine oil or thin machine oil canbe used.轴承压缩空气在密室里经过了管两端轴承、出口提供冷却到轴承。
这简单的球轴承润滑与种族和他们提供压力油雾买从引擎本身。
非常低流量油比恒定流为下降会导致球打滑的详细信息。
汽轮机油或薄机油泵被使用。
压缩空气将穿过轴套为轴承提供冷却，轴承为简单的滚珠轴承，用自身的压缩空气压油提供油雾润滑。
可以用透平油，或低粘度的机械润滑油。
FD3-64的设计合理的利用压气机的空气，将温度控制在600度以下，从而保证各部件的强度。
在运行中我们要注意发动机的温度不能超高。
4.fd3-64能推多重的模型，国内造价要多少？对于航模飞机来说，0.5的推重比完成各种特技动作都已够了，这台发动机的设计推力约3kg 力，也就是说，你的航模总重达6kg在飞行中都没问题。
按fd3-64r材料本身来说不值钱，不锈钢在国内100元就买齐了，主要是加工费用问题，可能是材料的数倍。
Starting the engine启动发动机All engines require a large volume of air to start them. Some like the AMT and JPX use scuba tanks. The home-built enginesmostly are started with a fan held on the air intake. The fan can be a converted hairdryer fitted with a more powerful motor.The alternative is to use a high revving small electric motor onto a friction cup. The supplementary gas is lighted and the fanincreases the revs . The liquid fuel is slowly fed in until the engine speed picks up and the engine self sustains. It can get hotwhen starting if too much fuel is fed in to quickly. With practice starting is simple and undramatic , there should be no flamesvisible either during starting or running.所有的引擎需要大量的空气,引导他们。
一些喜欢该和JPX使用呼吸器的坦克。
home-built引擎的主要是开始一个风机进气上举行的。
本风机可改装吹风机配有一个更强大的电机。
另一种办法是使用高经济上小电动马达摩擦杯。
补充气体是明亮的风扇增加的转速。
液体燃料是美联储在慢慢直到发动机转速回升,引擎自我维持。
它会变得炎热,当开始如果太多的燃料是美联储在快速。
与实践的简单、undramatic开始,不应该有任何的火焰不论是在启动或运行可见。
Controlling the speed控制速度This is achieved by the use of a speed controller that controls the fuel pump motor. When bench testing it is more convenientto control the speed by a hand operated controller such as a minidrill speed controller rather than use a transmitter receiverand speed controller. When mounted in a plane a motor speed controller is used or if available a fully programmed ECU.Overspeed should be controlled by a combination of battery power and pump pressure so that whatever happens to thereceiver or transmitter the supply of fuel is restricted.Underspeed can be controlled via a pressure switch that stops the engine if pressure drops below a pre determined point.这是取得了采用调速控制器控制油泵电机。
当长凳上进行测试,更为方便来控制速度控制器由手动操作,如minidrill速度控制器,而不是用发射机接收机和速度控制器。
当安装在一个平面马达调速控制器采用可编程或者一个完全控制单元(ECU)控制。
超速应控制相结合的电池电源和泵压,无论发生什么事。
接收和发射机的燃料供应是受限的。
Underspeed可以通过压力开关控制发动机停止,如果压力降到一个预确定的观点。
What is a sensible rev limit?转速控制In the Kamps book there is full detail on how to calculate the critical speed for the shaft. The speed will depend on the materialthe shaft is made of and the thickness as well as the weight of the compressor and turbine and their positions. In practiceengines with a 316 or 310 stainless steel turbine should have the revs restricted to about 75,000 rpm. Above this speed thematerial will expand and cause it to bind on the housing. The Kamps engine is limited to about 103,000rpm and the newSchreckling at 117,000rpm. The higher the revs the more need there is for the engine being well balanced.在Kamps书有充分的细节如何计算轴的临界转速。