Jeroen Ottens

I bypassed the gearbox with a separate axle in my DB11. I think you could see a couple 24T gears in the teaser video on the engine assy.

I am still in waiting modus... 1) I still like to get some feedback on the paneling behind the doors. Is it OK, or is it too Audi like? 2) I'd like to have the chassis with the gearbox integrated, to get a feel for the proportions once that is fitted (because it will be a big volume eating away in the center) I think other than the chassis and the bodywork we also still need chairs & interior, but that also waits for the chassis+gearbox marriage. Jeroen

A couple of years back I sold the digital files of my first crane to a German guy. He used them to create his own (simplified) version of it and sells the buildinginstructions of it. So it does look a lot like my crane, because it is based on it, but it is indeed not the same.

Interesting and good that you found a compact solution. One question though: Why don't you use the 7L gear rack with 12T gears? Adding a beam above it (oriented sideways so that the curved edge acts as a natural guidance for the 7L rack when it is extending) should then be enough to limit the tilt of the outrigger... Or do you need the space above the 8T gears?

The rear suspension looks great, but it is a bit flimsy... It is only the friction on the stud of the jumperplates that prevents the whole assy from rotating, right? I do love that slight taper in the grey beams

I would bet on a cage structure inside. Why would they use the 2L bar with balljoint otherwise?

Thanks for all the positive comments everyone , I really appreciate that. For now I am thinking 4 stage telescopic. And yes the Y-arms will be on there as well The speed of raising the boom is indeed really, really slow. It takes about 3 minutes to fully extend the cylinders. I tried to gear it down to get enough power to lift the boom, which is going to be very heavy. But it can well be that even this much downgearing is not enough to get it going (the first few degrees are the hardest). If it turns out I can't get it to move the first part I can gear it up a bit and compromise on the boom lifting capacity.

Thx. I wasn't planning on adding more body, but maybe I should reconsider. You mean in the triangular areas?

Hi, Time for another update. This time it is the superstructure: It is packed with functions, all RC, 13 in total. 12 are actual functions organized in 4 groups of 3 functions each and one is the switching between the groups of functions. I use 4 motors in the carrier, 2 L-motors and 1 XL motor for the functions and 1 M-motor for switching between the groups. Together with the 4 motors of the carrier this gives a total of 8 motors, which means that it is possible to use 4 remotes and control everything with this one überremote (in practice I use only two remotes, I simply switch channels when going from carrier control to superstructure control. Here is an overview of the function groups: Group 1 Yellow: Rotating the arm of the cabin Black: Raising and lowering the cabin Red: Tilting the cabin Group 2 Yellow: Winch 1 Black: Winch 2 Red: Boom function 1 (which will be extending the boom. This way it is possible to extend the boom and wind down the winches at the same time) Group 3 Yellow: Boom function 2 Black: Boom function 3 Red: Rotate the superstructure Group 4 Yellow: Boom function 4 Black: Raising and lowering the counterweight Red: Raising and lowering the boom As you can see there are 4 functions going into the boom. Since the load on the pivotpoint of the boom will be massive I made sure that the gears that transfer these functions to the boom are not loadbearing. Here is a close-up shot of the area where the boom will be connected: The four red clutchgears at the top are the ones that will connect to a similar set of gears in the boom. This construction will also make it fairly easy to dismount the boom. It will be a simple matter of pulling out four axles and then the boom is loose. Here is a video to showcase all functions (or at least the ones that are in the superstructure itself): And finally a shot of the superstructure mounted on the carrier: Comments and questions are welcome as always, Leg godt, Jeroen

In one of the images on Brother Bricks you can see a second large LA at the rear bottom. It looks to be directly coupled to the lowest 12T gear in the middle of the body: From a function perspective it looks quite simple. All linear actuators look to be driven (alomst) directly from 12T gears... Just wondering what the gearrack function is for. I guess it is driven with the gear at the back of the body (which is again a direct coupling between the gear and the actuator...)

What don't you like about the rearaxle? BTW I love the use of the F1 nose as the center console

Nice clean lines with a good set of functions. For me the fuselage is a bit too straight and boxy to make it a believable jet though. A two-inlet, single engine jet usually tapers towards the single engine I think. And I would make part of the vertical fin fixed and part of it moveable.

Congratulations! It was again a pleasure to follow your build. I hope to see more of your ramblings in the time to come.

It looks brilliant! Such clean lines, wonderful. It looks still pretty rigid as well, is it?

What gearbox did you implement? Is this the 4+N+R?

It switches three functions at the same time (just like the 8043). In the position it is now the motors drive the three outrigger functions (spread, extend, lower). When switched to the other side the motors drive the drivetrain (drive, steering, switch steering mode). In total the carrier has four motors, three for the functions and one to switch between the functions.

Keeping the proportions will be a challenge indeed, but I think there will be just enough space under the bonnet for the engine in it's current position. If you look closely in the sideview sketch you can see that the engine was sitting quite a bit below the bonnet, so a stud higher should be possible. The choice for dark azure will haunt me for some time I am sure... However I am not going to use third party hoses. If needed I might use black or silver flexaxles to shape the body more. "Graenser skaeber kreativitat" I learned at LEGO. "Constraining yourself forces creativity", so I hope I will find an interesting solution for this lack of flexaxles

Those black gears are part of the drivetrain that pushes the outriggers outwards into the X-shape. I think that function is at a decent speed. (and no, it is not possible, there is a 16T gear below it at a 1 stud offset. That would have to change to a 20T gear, but then it would mesh two 16T gears at the same time). I used the colourcoding also on the gears (where possible). So the black function (spreading the outriggers) uses the black 20T gears, whereas extending the outriggers (yellow function) uses tan 20T gears and the extending of the feet (red function) also uses the tan 20T gears. It is the 8T gear to worm gear that is making the extension of the feet really slow. But I don't know how to get rid of that one, since the space is very limited there because the superstructure will be right above it. But thanks for thinking along.

Hi, It has been quit in this topic for quite some time, so it time to show what Marco and I have been doing the past weeks. First of all Marco has provided a couple of exterior sketches for the car: As you can see I assume that I can use the wheels of the upcoming Chiron (fingers crossed that that model is indeed dark-azure/black combo). I also made a first attempt at converting that into LEGO with just panels: This actually turned out to be pretty bad , the second version of the chassis was rubbish, no stiffness in the central column at all... Also shaping a body with only panels and a limited part selection is hell. I really, really hope that the Chiron comes with a few flexaxles in dark azure, because doing it with only panels will be a massive challenge. So I set out to first sort out the issue I had with the chassis. I completely redesigned it from the ground up for the third time. This time I used 5x7 frames in the central column instead of the 11x3 curved panels with 10 holes that I usually use. And it gives a much better result. I also raised the engine another stud to simplify the routing of the switching mechanisms. That whole part is now working like a charm, I'm really happy with that.

That should be possible I think. I use a pretty basic parts set, so by the time it is finished changing into different colours should be relatively straight forward. Thank you, I'll do my best to keep the standard high. Here you go:

I am still waiting for feedback on the rear paneling...

I like technical writeups with pictures. I think this post is a good balance between the two. Updates are dictated by you. More frequent updates will mean smaller steps, so the effort/gain ratio might skew towards too much effort. It really depends on personal taste/available time/need for feedback and only you can determine that balance. The photos do need more light and it helps to have a more even background as well.

No they are too wide, I do plan to use them on the outriggers on the boom though with the new gearracks. I'll see if I can find some time for an overhead shot of the middle section. Anything in particular you want to see? That will depend a bit on the interest I get and on whether I think the quality of the build is high enough. Making instructions will be a mammoth task, I estimate I'll end up using 8000 to 10000 parts... I might also release it as an exclusive set like I did with the Tomcat, but if I do that I will make the instructions available separately as well.

The outriggers are mounted with a pair of these elements: and It was quite a challenge to get all the heights right. The gearracks need to be mounted slightly out of system to ensure good contact with the wormgears. At the same time the large linear actuators needed to be mounted in system to have the long axles move smooth through their mounting points. The gearing is a bit excessive: 1:10 from the L-motor to the linear actuator. I have looked into making it less geared down, but I couldn't find a better solution within the space constraints.

I agree about the panels. Since I have to make some sort of guidance system to avoid the lock-up during retract anyway I might be able to reverse the panel's orientation as well. Covering the axles will be difficult. That said, it is actually convenient that you can see the colours. I use coloured axle-axle connectors on my remote and this way I can easily see which channel is operating on which function (the functions are respectively red, yellow and black, switching is grey). The engine only runs when a 'red' function is used. That is either driving or lowering the outrigger feet. Thx, allthough it must be said that there is not a lot of shaping to do on carrier Thx. The steering mode switcher works by having two gearracks per axle. One gearrack is for the crabsteering and the other is used for the normal steering. By moving the steering axle forward or backward one of either gearracks engages. The only thing to take care of in this system is that you can only switch steering modes when the wheels are all straight. I have added a guide to the steeringmechanism to ensure you can only switch it when it is straight, but with the tolerances in the LEGO system that is not fool-proof. In the next iteration I plan to add another of these guidance systems to improve the performance. The two outriggers do indeed need a reversal of the direction of the driving shaft The superstructure is much denser than the carrier, I have incorporated 13 RC functions in it and with the weight of everything it is a real challenge to brace everything properly and route that many functions through it at the same time. I noticed the same thing when LEGO anounced the 42009. Also than a lot of cranes appeared on this forum. The 42082 might have to do with this The rubber bands are used to keep the driven wheels centered when in normal steering mode. In that mode the wheels are basically unsteered. Unfortunately there is so much slack in the system that this solution not really works... I have used this steering mode selector in my previous incarnation as well, so maybe you have seen it there