Since the last two years the Liebherr plant in Ehingen offers the PowerBoom for its large crawler cranes. The parallel boom which drastically increases load capacities was recently used for the first time on the LR 11000. The latest Liebherr crawler crane in the 1000 tonne class positioned a gigantic machine room on the tower of a wind turbine in Northern Germany. It was a gross load of 220 tonnes.
The heaviest component of the system was the massive machine room. With a radius of 30 metres the LR 11000 together with the load cross beam and hook block hoisted a total load of 220 tonnes to a height of 130 metres. Just for comparison, without the PowerBoom, it would only have been able to hoist around 160 tonnes with the same hook height.
But it is not just the bare figures which are mightily impressive. It was also definitely something to see. The system was fitted to one of the largest wind turbines in the world. The massive star of rotor blades had been completely pre-assembled on the ground. With a diameter of 152 m, the massive propeller was almost the same height as the hight church spire in the world on the Minster in Ulm.