aminnich

oops, did read just looked at the great pictures!! haha i have to learn to read the descriptions more often

This is a very cool build. My only question is, Is it a real thing or just a Lego build??

The very first original plan before i started building was to make this model exact, but since the crane is a concept and their are not a lot of actual cranes, just a few drawings and a few actual cranes for expos and what not. I dont really have specs to follow to match the crane. So the only part that would mirror the crane would be the 3 axles. So i figured, just base my crane off of the GSK55 trailer crane a little bit. I made a list of the functions i am my build to be, but im sure 50% of them are not on the GSK55, so then again i would not be making the exact crane. Good thought, but their is not enough information about it to build it

Nice progress Milan, I'm looking forward to the functions of the crane tho :D I agree, but a small company sticker would be a nice small touch. But large (non Lego) stickers should b frowned apon. Just my thought tho

Here is an example of a drawbar trailer. I think this would be a great addition to the Arocs truck. Like Saberwing40k said, a drawbar trailer does not have a 5th wheel connection. I believe the picture of the drawbar is even connected to an Arocs. Nevermind, that is a Scania. I hope this helps

Alright, so I made a mock up of the Outrigger design that i last posted. As you can see by the pictures it is about 6L too wide so i have to change that, but other than that, it seems to be fairly strong. The only thing i dont like about it, is that it uses a lot of parts that will be needed for the rest of the build, so that could be a problem..

Here is an updated outrigger idea... One section but a lot stronger than the double. Of course it is half the length

A crane has a lot of functions that have to be put into a small space and this has to be done right if you want it to look good. Im sure Milan can do this without a problem tho. Nice start and i look forward to future progress

Like I said, i want to experiment with the outriggers. I was hoping for a wider stance but, i think it will be better to focus on a stronger stance. I hope to get pictured posted by tonight

The steering is good. I tried pulling it around with the truck I quickly made for this trailer and it seems to work well. @krisandkris12; thanks for your advise regarding the outriggers. Everything u said makes sense. My thought was go wide with the outriggers for more support, but ur right they are not sturdy and won't hold up. A not as wide and stronger setup would be better. I'll try making something today to post Like I said, im trying to make it fairly compact so it fits where i want it, but i dont have pneumatics to use as the up/down part of the outrigger

The red section is the main section, it will not extend. Only the blue and yellow sections will extend

I have the sections of the outriggers apart. The yellow goes in the blue, and the blue in the red. The yellow will be extended via string and the blue section has a gear rack on the bottom.

Another update: Now that the steering to fixed thanks to MaxSuperCars, i started working on an outrigger system. I was having a lot of problems with making it fairly compact and still functional. I was making different prototypes but, nothing was really working, so i tried it in LDD and this is what i made. I hope the link works, it should just download so you can view it. If you dont have LDD and you want to see it, i can post screenshots if you'd like. https://www.bricksafe.com/files/Aminnich/idea.lxf

Thank you!!

did anyone make the original 42009 in LLD??? and is the file somewhere i can download it??

here is just a quick picture of a tower crane. You cane see that the main rising structure uses "X"s but the reach structure has various triangles And this is a pretty close match of the picture above, but in LEGO

Your truss designs look pretty good, I only have one comment. Usually trusses have some kind of "X" design, the reason is so the the square area is broken up into 4 triangles with the "X". As a student in an engineering college that I the first thing that I saw. It truly know if they are good or not you would have to do some load tests and see if the design can hold up to the weight, and if it can't, throw some "X"s in there. Just my two cents

officially unfollowing this topic... Haha

I changed my idea from the original post, it is still a trailer, but it wont be self driven. So the trailer will not have any driven axles

Another small update, i am going to try and post often and pictures of my progress each time. This time it is a successful steering update. And a huge thanks to MaxSuperCars!!! So here it is, a 6 axle steering chassis.. EDIT: now im working on the outriggers, trying to make them a decent size for the crane size.

The way that I'm doing the new setup for the trailer I will have a bunch of room for another servo, plus a lot of other fun functions :)

This is a trailer crane, they all need to turn the same way for it to work properly. And thanks for your help! Now I can do what I wanted to instead of having to change design ideas EDIT: my only concern is the number of gears for the servo, but if it is too much I can add a another servo, no problem

ok, i think i understand. I will try this the next time i have a chance to work on my crane. But just to clarify, the 20 tooth bevel and 12 tooth bevel are changing the turning angle for the 2 leftmost axles shown in the picture. So if i would add the same 20/12 gear set up after those axles, it would change the turning angle again. So i could have 6 different turning angles, using 2 gear changes.

Sorry for all of my little messages, but here is a small steering update/ problem From the pictures below you can see that i just extended the beam length by one for each axle, starting from 3 in the back to 6 closer to the front. These all work fine, but i want to add 2 more steerable axles, but if i continue with how i did the others, the wheels don't clear the turning beams (7L and 8L). So again im a bit stuck. As others have mentioned, i could gear up or down a motor to get the desired turning angle, the problem is that a servo wont be able to handle all of those gears and i want to use a servo for the return to center feature. I could add another servo, but im not sure it will be able to handle it. So here are some pictures of a new steering set-up... comment or ideas are welcomed. The second picture is bugger, so you can see the steering arm lengths.

I like this, it looks like a much smaller build than the other WIPs, but i like the idea of a small compact build. I also like the boom design. Nice job :)