Research of Wing-in-Ground Effect Craft by Radio Control Models

利用鸟取县大学的3个TN-1、2和-3模型，以及名古屋大学的NT-1、2和MNT-3模型，对无线电控制的地效翼飞行器模型进行了飞行试验。TN-1的利比希翼带有鸭翼，它可以使安装在机头前的螺旋桨的滑流转向，由燃气发动机驱动。NT-1有一个普通的飞艇型。它的机翼是一个改进的利比希翼，它的前缘被切掉，以引入安装在机头前面的两个螺旋桨的滑动流，并由两个电动机驱动。这两种模型均适用于高速高效的船舶。从那时起，鸟取大学的研究重心就放在了低速小型飞行器的开发上。另一方面，在名古屋大学，继续努力开发高效率的工艺。TN-2有一个撞角翼，它能达到一个低翼载荷并且适合于一个低速飞行器。NT-2的机翼…More是直线型的，而不是Lippisch机翼，以最大限度地提高动力增强升力（PAR）的效果。TN-2除有调高倾向外，其余均表现满意。为了控制螺距上升，设计并建造了TN-3。NT- 2的两个电动机对于它的型号来说不够强大。新型MNT-3采用燃气发动机设计。最后两种模型在水面上实现了持续的低空飞行。在这个研究项目中，鸟取大学的研究人员有机会为另一个载人模型WIG项目提供建议。成功地开发了一款1座和2座。他们正在努力开发一种生产模式。与此同时，名古屋大学的研究人员也建议了一个载人PAR-WIG模型的项目。这个模型成功地实现了连续跳跃。他们获得了许多有价值的PAR-WIG发展数据。从这些结果中，我们发现在实际应用中俯仰稳定性是一个重要的问题。我们将利用数值模拟来研究这个问题。少

Flying tests of radio controlled models of Wing-in-Ground Effect (WIG) craft were conducted using 3 models of TN-1,2 and -3 at Tottori University, and other 3 models of NT-1,2 and MNT-3 at Nagoya University.TN-1 had a Lippisch wing with a canard, which deflrct slip stream of a propeller mounted in front of its nose and drived by a gas engine. NT-1 had an ordinary flying-boat type. Its wing was a modified Lippisch wing, whose leading edges were cut out to introduce slip streams of two propellers mounted in front of its nose and drived by two electric motors. These two types of models revealed that they were suitable for a high speed and high efficiency craft. From this time, weight of research effort was put on the development of a low speed and small craft at Tottori University. On the other hand, at Nagoya University, effort was continued to develop a high efficiency craft. TN-2 had a ram wing, which could achieve a low wing loading and was suitable for a low speed craft. Wing of NT-2 … More was rectilinear instead of a Lippisch wing to maximize the effect of power augmented lift (PAR). TN-2 had satisfactory performance except the tendency of pitch up. To control pitch up, TN-3 was designed and constructed. Two electric motors of NT- 2 were not enough powerful for its model size. A new model MNT-3 was designed with a gas engine. These last two models achieved constant low altitude flight above water surface.During this research project, investigators in Tottori University had a chance to advice another project of manned model of WIG. A 1-seater and a 2-seater were developed in success. They are now making effort to develop a production model. At the same time, investigators in Nagoya University also advised a project of a manned model of PAR-WIG. This model succeeded to a continuous jump. They obtained many valuable data of PAR-WIG development.From these results, we find out that one of important problem is pitching stability for the practical use of WIG. We will study the problem by making use of numerical simulation. Less