1:75 That crane can be made functional. For this, 3 geared motors e.g. from www.anghuber.de and a 6-pole rotary union are required. 1 motor with 10 RPM for turning the tower and 2 with approx. 50 RPM for the rope drums. The crane operation is not prepared. Rotary feedthrough and motors are not included in the scope of delivery!