Some have 4 turbine engines...I dont even know what the one at the end has. Looks like a circle of engines.
[ame="http://www.youtube.com/watch?v=C3eRru7LfMw&feature=related"]YouTube- Tractor Pulling Weseke 2008[/ame]
[ame="http://www.youtube.com/watch?v=C3eRru7LfMw&feature=related"]YouTube- Tractor Pulling Weseke 2008[/ame]