As has been documented here before, TLCB Team – as a rule – dislike cats. We appreciate that’s a controversial thing to say on the internet, which is very possibly ruled by cats, so prevalent is their content, but we’ve probably said worse.

We do like this cat though, Sariel’s huge Caterpillar 797F dump truck – which is currently filled with Elves riding it up and down the corridor here at TLCB Towers – and it’s packed with functions.

Firstly, that enormous bucket they’re piled into features a remotely operable dumping mechanism thanks to a Mindstorms EV3 IR sensor, which we’ll test out on our unsuspecting workers shortly. The choice of a Mindstorms control unit is an usual one, as they don’t often feature in models here at TLCB, but Sariel’s decision to use one is rather cunning…

The Mindstorms EV3 not only controls the tipping bucket, it also measures the suspension tilt and applies an automatic motorised correction to keep the Caterpillar level. Self-levelling suspension is a system relatively common on SUVs (as well as mining trucks), but it’s one that requires such ridiculous ingenuity in Lego form that we don’t even know how Sariel began. But then our cleverness peaked with the title on today’s other post, so it’s no surprise that this is way over our heads.

Sariel’s Caterpillar also features remote control drive and steering via LEGO’s Power Functions system, non-LEGO ‘Baja Claw’ RC tyres fitted to standard LEGO wheels, and a host of accurate details and decals to replicate the real 797F.

A complete gallery of imagery is available to view at Sariel’s Caterpillar 797F Flickr album by clicking here and you can join the discussion plus watch a video the the model in action (including a demonstration of the clever suspension) by visiting the Eurobricks forum here.