Radio controlled Gliders don't usually have any propulsion, although some will come with a small electric motor used to take the model up to height to start gliding. Because most gliders are nonpowered, flight must be sustained through exploitation of the natural lift produced from thermals or wind over a slope, using the speed of the model to create lift. Either way, its often possible to be flying all day. Soaring has to be experienced - it's a great Sunday afternoon hobby, and is true Silent flight.Electric flight aircraft usually have a more conventional shape, often being scale models of the real thing, and just like their full sized counterparts typically employ throttle, rudder and elevator controls, with some more advanced versions incorporating ailerons to give banking and aerobatic capabilities. Whilst some models are designed around traditional electric motors, many are now utilizing new brushless motor technology, allowing greater flight times and considerably higher performance and can be recharged from a car battery.Glow fuel or internal combustion engined models are much more demanding in maintenance and will have at least three functions: throttle, rudder and elevator, although provided the operator is using the services of an instructor, there is no reason why a trainer should not have aileron control as well. The typical powered trainer will be a high wing model, with sufficient stability to allow the model to fly 'hands-off' while the flyer thinks about what to do. Most models will require some building and trimming and experience will help.