sandman wrote:Oh, right. Never noticed. Just got excited when I saw "gliding in Hsinchu (Xinzhu)" and for a moment there...
but how do they do RC gliders? They don't have engines.
They are either pulled up by an electric winch or a rubber cord + cord/rope combination which have a small ring at the end that is hooked into an L-shaped hook at the bottom of the plane. The plane is then held at a very steep angle so that it will rise up rather quickly once the winch is started and / or when the plane is released from the hand.
Once the drag of the winch or rubber cord lessens the plane stabilizes by going into a horizontal position and eventually the plane just unhooks itself due to it's forward motion. Until then you only need to control the rudder so that the glider doesn't get dragged sideways, else it will very likely crash.
It's also possible to use a motor that is build into the body or sits on top of the wings (typically); I have one back home that runs on gas, the tank is so small that it's just enough to get the plane up before running empty, so there is no need to cut it off manually.
The most fancy way is using another, motorized plane that pulls the glider up and remotely releases it once it has gained enough altitude.