Technic Crane # 42009

Another kit modified to full remote control with the use of seven more power function motors, four IR receivers, and two battery packs. I first saw this modified crane on Brickshelf built by Jurgen Krooshoop with a link to building instructions. Most of the crane is built to the Lego instructions, but some of the remote functions are from his instructions.

There are four motors in the main part of the crane, one for driving, one for steering, one for extending and retracting outriggers, and one for lowering and raising the support legs.
For the boom on the crane there are four motors, one for extending and contracting the boom, one for running the cable, one for raising and lowering the boom, and one for rotation.
There is only one thing about this modification is that it moves forward and reverse way too fast, all other functions are okay.