Replacement of a rotor blade by Scholpp and Mayer
A Südwind S-77 wind turbine near Kraftisried (DE) was hit by lightning resulting in a destroyed rotor blade. To replace the rotor blades are two cranes required that must be erected on a very challenging location in the forest. The lifting was under supervision of Scholpp from Stuttgart (DE).
Scholpp was deploying their Liebherr LTM 1350-6.1 with 85 tonnes of counterweight.
The crane was erected on a specially prepared terp.
The Liebherr was erected in TVYEFH configuration, where the superlift is attached to the boom foot of the fixed jib. The main boom is here extended 65.6 meters, the fixed jib has a 36 meter length and the adapter with the attachment for the superlift is 3.5 meters long.
The second crane was sourced at the local crane rental company Mayer from Burgberg (DE), they were deploying their largest crane, the Tadano ATF 400G-6. The crane was fitted with 78 tonnes of counterweight.
The ATF 400G-6 was erected in MB + FJ configuration, where the main boom is extended 60 meters with a 49.5 meter long fixed jib.
At first the old damaged rotor blade will be replaced, only the base was still attached to the hub. Mayer is using here jib sections of Scholpp's Tadano ATF 400G-6, only the last two sections belong to Mayer.
The old part is relative easy and fast dismantled.
In the meantime have the new rotor blades also reached the crane, these are driven by a MAN TGX 33.540 of Hofmann from Paderborn (DE). The rotor blades were bought used because this type of wind turbine isn't produced anymore.
Because of the relative large minimum radius of both mobile cranes was it required to position the trailer as much as possible to the right. The rotor blade is attached now and will be installed directly.
The 38 meter long rotor blade is lifted by both cranes, Mayer is lifting here 5.1 tonnes and Scholpp only 2.5 tonnes.
Impressive lifting in the middle of a forest; very beautiful to see but challenging to take photos. The wind turbine has a shaft height of 90 meters.
At the end of the day was the first rotor blade already installed, the remaining two blades will be replaced on the next day.