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Liebherr LTM 1055 S-4 in scale 1/24
My next project will be a crane again.
This time an all-terrain crane. This model is actually one of the first all-terrain crane and it set the trend for the future. The LTM1055 was designed by Liebherr for a large order from Russia for a gigantic natural gas pipeline project in the early 80 |
Re: Liebherr LTM 1055 S-4 in scale 1/24
This will be interesting. Great work as usual :)
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Re: Liebherr LTM 1055 S-4 in scale 1/24
Watching!
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Re: Liebherr LTM 1055 S-4 in scale 1/24
Looking forward to this build...
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Re: Liebherr LTM 1055 S-4 in scale 1/24
During the past months i worked on the axles. all 4 are driven and there is limited space, so I need to design them carefully. I started with one axle to make sure it fits and in order to try things out. Now I think I am ready to make the other 3 axles.
The basis is a block of AL. https://live.staticflickr.com/65535/...a6f9bec0_b.jpg The diff is a Traxxas 1/16 VXL E-revo. It is not too big and looks pretty sturdy. https://live.staticflickr.com/65535/...a871c4e3_b.jpg here the axle is taking shape: https://live.staticflickr.com/65535/...876428df_b.jpg https://live.staticflickr.com/65535/...b66cbd77_b.jpg And here with the wheels: https://live.staticflickr.com/65535/...6b000ae6_b.jpg Kerst |
Re: Liebherr LTM 1055 S-4 in scale 1/24
Amazing design and workmanship - as usual!
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Re: Liebherr LTM 1055 S-4 in scale 1/24
A TRUE Craftsman at work again.
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Re: Liebherr LTM 1055 S-4 in scale 1/24
It's nice to see a another scratch build on this forum. I'm really looking forward to this one :popcorn:
-Shawn- |
Re: Liebherr LTM 1055 S-4 in scale 1/24
HD axles :D
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Re: Liebherr LTM 1055 S-4 in scale 1/24
Those look absolutely bulletproof!
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Re: Liebherr LTM 1055 S-4 in scale 1/24
I still have a stack of tires, which I used for other truck cranes, like the Liebherr LTM1800 and they would be the right size for the LTM1055, but they are not perfect. This off-road crane needs off-road tires, so I have been searching the Internet for a while, but didn’t find anything.
Last week I was clearing up some drawers and found some nice tires and when I measured them, they proved to be perfect for the LTM1055! In the early 80’s I bought this Conrad model of a Wabco Haulpack and somehow the tires survived. But I only had 6 of them and I needed 2 more. Luckily, I found a Haulpack for very little money, so now I have 12 tires! https://live.staticflickr.com/65535/...2b6e323b_b.jpg Comparing tires: https://live.staticflickr.com/65535/...471d510c_b.jpg Loosely fitted: https://live.staticflickr.com/65535/...3833bd2b_b.jpg https://live.staticflickr.com/65535/...62026a53_b.jpg Now I have all the parts for the axles. Kerst |
Re: Liebherr LTM 1055 S-4 in scale 1/24
Kerst, you are a master builder! I'll be anxiously following the progress in this build thread!
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Re: Liebherr LTM 1055 S-4 in scale 1/24
Thank you all!
During the past months I have been making the parts for the axles. It's a lot of work, but it is getting there. https://live.staticflickr.com/65535/...f0651bd9_b.jpg https://live.staticflickr.com/65535/...8f1322d8_b.jpg Kerst |
Re: Liebherr LTM 1055 S-4 in scale 1/24
I have been working on the axles and the suspension. The original LTM 1055 S4 had the old fashioned Liebherr suspension with coil springs. Only later they introduced the hydraulic suspension.
The third axle also has the transfer box incorporated. https://live.staticflickr.com/65535/...6169fd32_b.jpg https://live.staticflickr.com/65535/...03e20724_b.jpg I made most of the parts for the axles, but I first wanted to get the suspension done before finishing them. It is quite tight and needs a bit of figuring to make it all work. Kerst |
Re: Liebherr LTM 1055 S-4 in scale 1/24
Finally something to show. With all the rain this weekend I had plenty of time to finish the wheels and fit the tires.
https://live.staticflickr.com/65535/...e3708ec0_b.jpg https://live.staticflickr.com/65535/...287da289_b.jpg https://live.staticflickr.com/65535/...d7646542_b.jpg The axles are basically done, just lots of finishing and fitting. Then I can add the drive shafts. Then the steering. Kerst |
Re: Liebherr LTM 1055 S-4 in scale 1/24
More than a month later and not much obvious progress, at least non visibly.
I got all the gears in the axles to turn smoothly, the suspension works well and I got the steerage linkage figured out. This was quite something with the limited space available. This morning I mounted the servo and I am debating how to connected the rear axles, either with a separate servo or with a special linkage. Stay tuned! https://live.staticflickr.com/65535/...6c239c52_b.jpg https://live.staticflickr.com/65535/...b753f7d4_b.jpg https://live.staticflickr.com/65535/...31c0dc5d_b.jpg Kerst |
Re: Liebherr LTM 1055 S-4 in scale 1/24
As always, marvelous attention to detail and getting things to work!
Just for fun, consider having a separate steering servo for each axle controlled by 4 different channels - then you can go crazy trying to drive and steer! For a guy that made a transmission with actual mechanically controlled clutch packs, should be no problem! Kerst, you do such interesting projects, overcome problems in new ways, and approach the hobby with a fresh eye, I salute your efforts to keep scratch building alive! Looking forward to when we get to see each other again. Ken |
Re: Liebherr LTM 1055 S-4 in scale 1/24
The past months I have been working on the RC controls and the cab. Initially I had a lot of stuff in the cab.
https://live.staticflickr.com/65535/...f4988d35_b.jpg But I changed my mind and opted to create more space for the interior, like chairs, etc. that meant that I had to rearrange things a bit. I also fitted the light, which are usually an afterthought, but actually take quite a bit of space. Luckily there is some space behind the cab and there I fitted one servo (gearbox), the receiver and the speed control. There are two servos between the front axles and the rear axles on either side (one for the rear steering, the other to engage front wheel drive). The other two servos (5 in total) are under the floor of the cab, one for the high-low gearbox and the other for the front steering. All the servos are micro servos. Unfortunately there is not space (yet) for the battery. I will figure something out. https://live.staticflickr.com/65535/...113cdcb0_b.jpg Then finally I could do a proper test run: https://youtu.be/QchCmGFTASg Kerst |
Re: Liebherr LTM 1055 S-4 in scale 1/24
What a fine build so far. Chapeau!
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Re: Liebherr LTM 1055 S-4 in scale 1/24
amazing workmanship
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Re: Liebherr LTM 1055 S-4 in scale 1/24
Here two pictures of the front and how the RC gear is fitted in
https://live.staticflickr.com/65535/...b78c3c33_b.jpg and her with the cab: https://live.staticflickr.com/65535/...1e7ea412_b.jpg Kerst |
Re: Liebherr LTM 1055 S-4 in scale 1/24
Those seats look hard ! Looks great
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Re: Liebherr LTM 1055 S-4 in scale 1/24
I did a little photo shoot today.
https://live.staticflickr.com/65535/...4d512928_b.jpg https://live.staticflickr.com/65535/...7b1e2493_b.jpg https://live.staticflickr.com/65535/...ec65f4fb_b.jpg https://live.staticflickr.com/65535/...2dc45cb6_b.jpg https://live.staticflickr.com/65535/...3b9d8dbf_b.jpg The carrier is getting there. It looks a bit lopsided (leaning forward) , but that is because the suspension is sprung and there is less weight in the back, but that will change. The outriggers are still missing and quite a few details. Kerst |
Re: Liebherr LTM 1055 S-4 in scale 1/24
It is summer and I spend more time outside, but I still managed to make some progress. I just finished the outriggers. I made the beams from 24 gauge galvanized steel, soldered together in an elaborate jig. They turned out quite nice.
https://live.staticflickr.com/65535/...004e30ce_b.jpg. The jacks are hand operated. They are too small for any motorized solutions, so just M4 screws. https://live.staticflickr.com/65535/...17016d96_b.jpg https://live.staticflickr.com/65535/...38c35710_b.jpg I also made the slewing ring, which is visible in this picture: https://live.staticflickr.com/65535/...75d2596a_b.jpg Next is the boom. I will try to make it out of 24 gauge galvanized steel as well. See how that works out! Kerst |
Re: Liebherr LTM 1055 S-4 in scale 1/24
Very nice work. Am enjoying watching your build.
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Re: Liebherr LTM 1055 S-4 in scale 1/24
Progress has been slow during the summer. Lots of other distractions. But I managed to work on the boom. After a few trials the best solution was 26 gauge galvanized steel soldered together. It worked surprisingly well. I have a good brake, which makes it easy, but precision is important. I filed the pieces exactly straight, then did some trails to get the measurements right before bending the 2 halves of each section and joining them together. One more section to go then I can install the mechanics.
https://live.staticflickr.com/65535/...f11a2bb8_b.jpg https://live.staticflickr.com/65535/...d2c8dcb3_b.jpg https://live.staticflickr.com/65535/...da13c5bb_b.jpg https://live.staticflickr.com/65535/...187a2bf4_b.jpg https://live.staticflickr.com/65535/...6cc6f42b_b.jpg Kerst |
Re: Liebherr LTM 1055 S-4 in scale 1/24
The boom is ready, except for some cleaning up.
https://live.staticflickr.com/65535/...48682876_b.jpg I had some gearbox and axle trouble. https://live.staticflickr.com/65535/...c92292ec_b.jpg but theses seem to have been resolved, fingers crossed! All functions work now. https://live.staticflickr.com/65535/...f8c31296_b.jpg Kerst |
Re: Liebherr LTM 1055 S-4 in scale 1/24
How do you plan to get the out riggers out and then down...?
Fantastic work by the way... |
Re: Liebherr LTM 1055 S-4 in scale 1/24
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Kerst |
Re: Liebherr LTM 1055 S-4 in scale 1/24
Very nice work as usual, sir. How did you form up your boom sections? Do you use anything to reduce friction between the boom sections?
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Re: Liebherr LTM 1055 S-4 in scale 1/24
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I will use Teflon tape to reduce friction between the sections. Kerst |
Re: Liebherr LTM 1055 S-4 in scale 1/24
Beautiful workmanship!
This just keeps getting more impressive. Plus the longer i look at a chassis picture, the more functions i'm seeing. I love the boom, outriggers, and that you were able to get an interior into that! Am i seeing a 2 speed trans? |
Re: Liebherr LTM 1055 S-4 in scale 1/24
During the past two months I have been working on the upper. I made the frame and worked on the boom hoist cylinders, the swing and the winch.
The boom cylinders will have spindles and all the components are there, but it all needs to be fitted. I managed to fit the motor right behind the mechanism in the upper. Hopefully the motor will be strong enough. If not I have to redesign everything. https://live.staticflickr.com/65535/...a83bb9e5_b.jpg Here are some parts of the spindle and gears for the boom hoist: https://live.staticflickr.com/65535/...a6dab40d_b.jpg The swing motor with an override clutch: https://live.staticflickr.com/65535/...f1aab76b_b.jpg the winch and the motor: https://live.staticflickr.com/65535/...40af4352_b.jpg And here with the motor assembled: https://live.staticflickr.com/65535/...03649ea3_b.jpg I plan to have 4 speed controls in the upper and maybe there is a space for a battery. We will see! Kerst |
Re: Liebherr LTM 1055 S-4 in scale 1/24
At 1/24 scale I realize that you're not going to be lifting any thing heavy. Will the gearbox drag be enough to hold the load when doing a lift? Will the boom extend/retract be manual like the outriggers, or will it be powered?
Don |
Re: Liebherr LTM 1055 S-4 in scale 1/24
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The boom telescopes with a spindle and cables. the motor sits in the boom. The outriggers are manual; it get too small there. Kerst |
Re: Liebherr LTM 1055 S-4 in scale 1/24
During the past 2 months I have made good progress.
Once all the functions were in place it was time to organize the upper. Luckily there is some space, because the motors take very little space. And I have space for a battery, which will power both the upper and the carrier. I created two different setups for one transmitter/receiver and it seems to work!!!! The receiver will be housed in the counterweight. https://live.staticflickr.com/65535/...8a2ff5ea_b.jpg https://live.staticflickr.com/65535/...43e20a7d_b.jpg https://live.staticflickr.com/65535/...c77bd9e5_b.jpg Next is fitting all the RC bits efficiently in the upper and finish the covers, then I will build the cab. Kerst |
Re: Liebherr LTM 1055 S-4 in scale 1/24
When you solder things together are you using soft solder, or silver solder?
What size are the screws you're using to lift the boom? |
Re: Liebherr LTM 1055 S-4 in scale 1/24
This is really looking good....
I se you used an N20 motor and what looks like a 180 can gear motor.... I wouldn't have thought they would have the power you need for something this heavy...makes me re-think some of my future builds in terms of motors to use... |
Re: Liebherr LTM 1055 S-4 in scale 1/24
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And the size of the trapezoidal thread is 6 x 2mm https://www.ebay.com/itm/302465758278?var=601294075008 Kerst |
Re: Liebherr LTM 1055 S-4 in scale 1/24
I believe that earlier you said that you were using 26 gauge galvanized sheet metal to form to parts of the boom sections. Since you silver soldered these parts, I've got a few questions:
1) How did you strip the galvanizing off before you silver soldered the parts together? 2) The upper and lower parts of the boom sections look like they are held together with a butt joint. How did you keep the parts aligned as you silver soldered them? (Those are some long joints.) 3) What silver solder did you use, and what flux? 4) What torch did you use for the 26 gauge material? I've been looking for small lead-screws for one of the projects I've got on the back burner. I know that they make lead-screws down to a 2mm diameter, but I haven't been able to find a seller with both the lead-screw and the lead-nut. Al least not at a price that I am willing to pay for a hobby item. I can find one, or the other, but not both at the same supplier. I hesitate to order from 2 different sellers, as some sellers can be "less than accurate" in their descriptions. Don |
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