suffocation

What's the point of putting €400 if the RRP is €300 and most shops sell it for less? Incidentally, there are plenty of chances to get it for 1/3 off.

Several prices look off - the Porsche's RRP, for instance, was €300. Same goes for the Arocs, the Volvo, the BWE, the Claas and the ship.

Given the parts available, you could probably pull off something with a basic linkage system.

Which sets are you using? Would folding outriggers work just as well?

Ah, I didn't know that - thanks for the heads-up A sprung set-up should be more interesting though, unless there are intricate pendular set-ups I'm not aware of.

Pendular suspension at that scale is a disgraceful cop-out, so here's hoping there's something more going on that we can't quite see.

Seconded - never been a fan of fully RC vehicles. I hope it has locking diffs, too. I'd love to see a 15-stud driven, steered and suspended axle with portal hubs and locking diff.

Love it! 42042 is my favourite studless set and the one that brought me out of my dark age for good. With a few more parts not belonging to the original set you can add a subtractor and bogies to the undercarriage.

After completing the prototype of a superstructure for a six-axle crane, I decided it'd be fun to try mounting it on a crawler carrier. The goal was to have six functions: - slew - boom raise/lower - boom telescope - winch raise/lower - drive - skid steer all driven by a single XL motor. I also wanted to have each function controlled by its own two-way switch, without having to continually resort to the battery box. The main body of the superstructure is my own very rough and unfinished design; the boom borrows heavily from Gerger's Grove; the undercarriage is a mod of 42042's, with the addition of bogies and a subtractor to enable skid steering. The superstructure works fairly well, even though the slewing is a bit jittery. The big let-down is the drive and skid steering - due to the massive backlash that builds up along the drivetrain, the crane can barely stutter back and forth. Still, I guess it's a decent proof of concept and I'd love it if a more competent MOCer would take my work and improve on it. I'm leaving it as it is, since it was just meant to be a quick diversion from other MOCs I'm working on. More pics here: http://bricksafe.com/pages/hateofallhatreds/crawler-crane

Looks great so far! Is the rear suspension a bogie, much like what you find on some tracked vehicles?

You, sir, are the Leonardo Da Vinci of Lego.

Actually, you can easily get away with 13 studs from hub to hub on a steered axle.

Third post in a row, this time with a request - has anyone got any ideas for a 15-stud (Unimog width) axle with drive, steering, suspension, portal hubs and diff lock? I've been racking my brains for days but haven't come up with anything viable.

Execrable pics of a trailing axle with suspension, portal hubs, diff lock and Panhard rod:

"Big truck" + "Full RC" + "6x6" + "1 M-motor" screams BS.

Thank you so much for sharing the instructions, Lipko. Really looking forward to building this masterpiece and stealing a few pages from your book. I owe you, mate.

Oh, great. I've been working (rather unsuccessfully) on a wrecker with Claas tyres for months and now Lego comes along and punts my work into Oldedom. As the old saying goes - "bollocks".

Addendum: check out @nicjasno's brilliant rebuild of the Unimog's front axle for an example of how to achieve proper steering geometry with portal axles.

They also make it easier to gear down and gain torque where you need it the most; the trade-off is that it's very hard to get a decent pivot point.

What a beauty! I'm not familiar with the original but your take looks outstanding. Would love to see a video.

Already posted by the designer himself:

Some hideous pictures of a dual axle with drive, proportional steering and suspension. Steering is achieved through a simple linkage system.

I built this test undercarriage a while back and it seemed to work: The most obvious downside is that all those half bevel gears are going to have trouble handling high torque. My lack of building skills and having the two inputs coming from what was meant to be the superstructure did limit my options somewhat.

An exercise in bad taste and disrespect.

This is an instant classic. I wish I had even just a shred of your talent! It's also nice to see that 2 XLs are enough to move 30 pounds of Lego - helps put things in perspective, methinks.