| After the successful flight of the | | | | gravity is located ¼ of the wing chord. |
| man-carrying vehicle made by the Wright | | | | Balancing it is by placing your fingers on |
| brothers, interest in aviation spread rapidly | | | | both sides of the wing, then relocating the |
| and many models were made. Model airplane | | | | receiver, batteries and servos until the |
| enthusiasts are already existing in the early | | | | airplane is balanced. |
| 1900s'. Most of the models are rubber | | | | |
| powered, twining type with double stick | | | | You may ask why the center of gravity is |
| fuselages that are common in Europe. But even | | | | located ¼ of the wing chord? It has |
| in the early days of model flying, small | | | | something to do with aerodynamic center, |
| petrol and compressed air engines are already | | | | neutral point that can be explained in detail |
| being used. The materials used in model | | | | with some illustrations by following the link |
| constructions are birch strips, veneer, | | | | on the bottom. |
| spruce, piano wire or bamboo and oiled silk | | | | |
| covering. | | | | When you look at the cross section of the |
| | | | wing, the shape is called an airfoil. |
| Then balsa structure and tissue covering | | | | Basically the airfoil consist of upper and |
| appeared in the United States in the late | | | | lower camber, leading and trailing edge. When |
| 1920s'. So much for the history of model | | | | the airplane is flying, there are aerodynamic |
| aircraft. So you see, even today, the | | | | forces that interact with the wings, vertical |
| airplane structure and how it fly is | | | | and horizontal stabilizers because the |
| nodifferent from the one we are flying today. | | | | airplane is going against the air or commonly |
| The wings, fuselage, vertical and horizontal | | | | called "relative wind". Then it creates a |
| stabilizers, propellers, engines, landing | | | | variance of pressure on the upper versus the |
| gears are the same. The airplane, to fly and | | | | lower camber of the airfoil (or the wing |
| have control during flight uses them. The | | | | itself) which generates lift. The air that |
| wings are obviously responsible why the | | | | passed the lower camber should have a higher |
| airplane canstay in the air for a long time. | | | | pressure against the upper camber to sustain |
| With proper design of the airplane, | | | | flight. This has something to do with law of |
| dimensions, weight considerations and | | | | continuity. The air molecules that separates |
| aerodynamic design characteristics it will | | | | from the leading edge, going to the upper and |
| fly successfully. The aerodynamic principles | | | | lower camber, should meet at the trailing |
| behind it is what really makes it fly. But | | | | edge at the same time. Since the upper camber |
| even though it has a good design, weight and | | | | has a greater curve than the lower camber, |
| balance plays a major role. There was a | | | | the distance on the upper camber is longer |
| saying that "a feather flies better than a | | | | and therefore requires more velocity to meet |
| brick" which is true because a very heavy | | | | the air on the lower camber. This creates a |
| airplane won't fly if it cannot be sustained | | | | lower pressure on the upper camber based on |
| by its power plant (engine, propeller, and | | | | the Bernoulli's theorem, "as the velocity of |
| fuel tank). And with regards to balancing, a | | | | air increases, pressure decreases" |
| well-balanced airplane is controllable during | | | | |
| flight. Usually the fulcrum or center of | | | | Hope my brief explanation is understandable. |