With the new radio controlled skyline crane Liftliner 4000 it is possible to operate the functions “load up/down” and „moving the crane“ at the same time. Therefore one can work very efficient and careful when thinning the forest, and also it is possible, to place the trees exactly on the desired spot at the offloading point. Because of the separate winch for the load, the mainline cable is fixed on the carriage and has the duty to pull the carriage. Therefore the carriage without clamps Liftliner 4000 works without wear on the skyline and mainline.