The tractor 9393 of the summer 2012 technic product line appears to be a promising set. It has some nice lime green pieces, including the #3 and #4 panels in this color - a first. The functions: HOG steering, moving blades of Tedder that rotate as it drives, and lifting Tedder. Permalink
The steering is done with the same design as many sets: 7m gear rack with 12t, 2 knob wheels. The Tedder's blades turn as the wheels do, unfortunately not with a differential as evidenced in this picture:
<img scr= http://storage.technicbricks.com/Media/2012/2H/9393_A2.jpg >
A universal joint is used for this mechanism, as well as this casing: http://www.peeron.com/inv/parts/4558692. This part is fairly rare, so this set is a good cheap way to get it.
The lifting of the Tedder is done with a worm gear, 8t, and two 9L steering links. More rare pieces!
The b model is an interesting, nice looking buggy. It has a working 4cylinder engine, despite the tractor not having one. It is made from axles and bushings, no normal engine parts. Quite an interesting design! Permalink