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Erik Leppen posted a topic in LEGO Technic and Model TeamSince the beginning of my AFOL-hood, I have been a crane guy, with many mobile cranes built in the past. Now, during the more recent years I tried to diversify, partly thanks to competitions like those on Eurobricks, and built various other vehicles. I think it's time to see if I haven't unlearned how to build a crane :) So, the goal. I aim for a five-axle crane in the same scale of 42009. I think five axles is a perfect balance: enough to be imposing, but not so much it becomes awkward :) I use the Liebherr LTM1200 as a source of inspiration. The extra space between axle 3 and 4 gives me some extra leeway, but I also find it to look better. This image is from the Liebherr folder; I drew a grid over it with 8 studs for the wheels, and some markings in red. Most functions will be manual. Not sure if I can even get a motor in, but I will try. But there is one function I really want: suspension. I think it just looks cool to have a multi-axle vehicle with suspension on all wheels, and it makes my model less of a 42009-clone. To do this, some other functions will have to be dropped, like the motorized double-acting outriggers. This is the progress so far. Each axle is a fixed unit that is connected to the frame by two shocks and two ball joints. As vertical space is limited and Lego suspensions always tend to become taller than desired, I had to find a way to create a sturdy frame, so I went for studded Technic bricks. This makes the frame very strong. Also I think it's a nice deviation from all-studless building :) (This will principally be a studless model, don't worry.) Then, the steering. If you ever want to add and connect the steering to so many suspended axles, let me warn you: it's not fun. Every axle needs two U-joints. I just ran an axle with lots of U-joints (at least 6) through the entire thing. Not optimal, but it works. The outrigger housing is a real pain to work around. Steering angles per axle are varied the 42009 way: by having different steering arm lengths. The ratios are 100% : 50% : 0% : -67% : -100%, or, in easier numbers: 1/2 : 1/4 : 0 : -1/3 : -1/2, where the denominator is the length of the steering arm. Axle 3 is the only axle connected to the fake engine. Speaking of which, there's hardly any room left for that! So I decided I will add a boxer engine (which is lower), and it will still have to stick out one stud above the roof of the cabin. So be it. Driving the fake engine will be a challenge by itself too, because the unwieldy geartrain for the front axle's steering is in the way. I will have to sacrifice a lot of ground clearance for the driving axle. Next up: add the fake engine, add the outriggers, lay out the measurements of the cabin, and see if I can get the first boom segment in place. One note about colors. It will not be yellow. I just don't want to add another yellow crane, but I'm still in doubt about color options. I love trying out weird color combos as you might know, but the boom will probably be white, because of the panels I have (thanks to 42025). So I will probably do a multicolor scheme where white and black/gray are combined with one or two non-grayscale colors. I love to hear what you think of the first take :)