This is a Foremost Chieftain R, a high-speed rubber-tracked personnel and cargo carrier, and it looks like a cherry picker and a tank have had one hell of an accident.
This amazing Technic version of Foremost’s bizarre tank-cherry-picker-thingy has been built by Thesuperkoala of Flickr who has packed it with incredible mechanised functionality.
Like the real Chieftain R, Koala’s Technic version features four powered tracks separated front to rear by a central articulated pivot. LEGO’s linear actuators operate the steering of Koala’s model whilst Power Functions motors provide the drive for these and the four tracks.
Mounted upon the rear section of the Chieftain is a large motorised cherry picker crane, with further linear actuators driving the boom raising/lowering and extension. The crane superstructure can also rotate, with four motorised stabilisers ensuring the Chieftain doesn’t tip over whilst it’s, er… picking cherries(?).
Koala’s creation is a hugely impressive build and one well worth a closer look. Head to Thesuperkoala’s Foremost Chieftain R album on Flickr via the link above to view the full gallery of excellent imagery.