RTT-21's are a three section wheeled transporters used to transport dangerous liquids through rough terrain. They are named as a 'Caterpillar', because they are usually painted green and articulated chassis makes that its move is similar to catterpillar's.
About this creation
Each section have a pendular suspension, that provides great stability when vehicle is moving through obstacles.
The cabin is taked from one of the 4 Juniors sets, 4653.
It has an awful pattern on front, so I rotated it on the back. It looked better, but there was no room for whole minifig. But his half fits perfectly ;)
Who says that Town Jr. and Jack Stone and other juniorized sets of LEGO Creator and LEGO Pirates are useless? Anyway, that was a nice way to utilize a rather difficult set of pieces into a new and eye catching set. I wonder if this guy that is driving the truck is selling propane and propane accessories? (I apologize for the obligatory "King of the Hill" reference.)
ah sunlight! I will try it next time, I used a lamp to light it, but the photos got wrong colours, thanks for the tip! ;) Have a look at my newest MOC though ^^
Btw I see a lot of aquazone stickers here! I kept them too, one day I will use them.