Gantry Crane
Built by Brian Leach in June 2011
Basically a good model, and could have been a lot better for want of 2 more bush wheels and some threaded pins. The bush wheels for the runners on one side, and the threaded pins for the four pulleys as bolts give too much play and the pulleys tend to de-rail.
There is a video of this model on YouTube, at time index 1:25.