HAMMERHEAD CRANES

This type of tower crane is called a hammerhead

This is the Mark 5 hammerhead built by apatov designs

It has all the features of a real crane-

a 3ft long jib and 1ft counter jib

The load line runs through a series of pulleys before winding up on the windlass.

The trolley sits on 4 ball bearing load transfers, which ride in a wood track.

A bike chain and sprocket are used to move the trolley along the track.