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  #41  
Old 05-09-2023, 07:27 AM
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Default Re: Liebherr LTM 1055 S-4 in scale 1/24

Quote:
Originally Posted by ddmckee54 View Post
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
1) How did you strip the galvanizing off before you silver soldered the parts together?
I didn't.
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.)
I clamped the two halves with wood inside and outside. This was the biggest challenge.
3) What silver solder did you use, and what flux?
STA-BRITE SBSK Silver Solder 3/64 1/2 oz STAR2000 by Stay-Brite
4) What torch did you use for the 26 gauge material?
A simple propane torch.

Kerst
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  #42  
Old 05-09-2023, 02:23 PM
ddmckee54 ddmckee54 is offline
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Default Re: Liebherr LTM 1055 S-4 in scale 1/24

Sta-Brite SBSK silver bearing solder, now I'm beginning to understand why you didn't have problems with the zinc burning off from the galvanizing. SBSK is a silver bearing soft solder, it melts at 430 degrees F.
(I'm editing this message now because the rest of the message got clipped off after the 430. A word to the wise... DO NOT try to use the degrees symbol, ALT + 248, in any messages on this forum. It sees that combination and deletes everything from there on.)

The low melting point explains why you didn't have trouble with the zinc burning off. It also explains how you could use wood to clamp the parts together, 430 degrees is below the ignition point of wood. I'll bet the wood was still well charred from the torch though. Maybe you could wrap the wood with the heat resistant tape they use on exhaust headers on 1:1 scale cars? You can get a 2"x100' roll for about $40USD.

You could probably use a Weller 200/260W soldering gun with that solder on the 26 gauge, there's not a lot of mass there to heat up. I was given one of those guns about 30 years ago, I haven't used it much, but now I might need to do some experimenting with it.

Thanks for the explanation,
Don

Last edited by ddmckee54; 05-09-2023 at 02:41 PM. Reason: Most of the message got clipped.
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  #43  
Old 06-04-2023, 08:29 AM
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Default Re: Liebherr LTM 1055 S-4 in scale 1/24

I made some progress with the crane cab. It is more complicated than I had anticipated, with lots of angles and a sliding door.





Kerst

Last edited by kerst; 12-10-2023 at 07:57 AM.
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  #44  
Old 06-04-2023, 10:26 AM
jerry56 jerry56 is offline
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Default Re: Liebherr LTM 1055 S-4 in scale 1/24

With what little experience I have working with brass and aluminum on my shovel build .... I have a huge new found respect for you guys that build entire projects with it...
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  #45  
Old 06-05-2023, 07:50 AM
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Default Re: Liebherr LTM 1055 S-4 in scale 1/24

Looks great. I look forward to seeing future updates.


-Shawn-
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  #46  
Old 08-26-2023, 07:55 AM
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Default Re: Liebherr LTM 1055 S-4 in scale 1/24

I entered the last phase of this built.

A few weeks ago I took the whole thing apart and started fixing lots of details of the carrier, then priming and painting it. Now it is time to put it all together again. I trying to put all the cables in their right place, which is quite a challenge.

Once the carrier is fully done I will do the same with the upper.





Kerst
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  #47  
Old 08-26-2023, 03:47 PM
jerry56 jerry56 is offline
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Default Re: Liebherr LTM 1055 S-4 in scale 1/24

That is going to be killer....
Can't wait to see this at Cabin Fever next year.
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  #48  
Old 08-31-2023, 06:22 PM
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Default Re: Liebherr LTM 1055 S-4 in scale 1/24

It's quite exciting to put it all together again. I took pictures before I took it apart, because I need them to assemble the crane again. Now it is like a kit.
Progress is good, but there are still a lot of loose wires and some details to finish.
When it is all together I will test it and then i still need to make a hook block and the jib.





Kerst
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  #49  
Old 08-31-2023, 08:53 PM
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Default Re: Liebherr LTM 1055 S-4 in scale 1/24

That is looking beautiful with the fresh paint!
__________________
What do ya mean "Cars are neither Trucks or Construction"?
It's still scale, and i play fairly well with others, most of the time...
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  #50  
Old 09-14-2023, 01:33 PM
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Default Re: Liebherr LTM 1055 S-4 in scale 1/24

Although I am still working on the details and the painting, I also started testing today.
I am very pleased that the telescoping works well and the boom hoist functions better than expected. I don't seem to get the winch to work. Probably an issue with the speed control.
The swing needs a bit adjusting, but that is easy.
So far so good!



No problem lowering the full length of the boom over the side.



Kerst
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  #51  
Old 09-14-2023, 03:17 PM
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Default Re: Liebherr LTM 1055 S-4 in scale 1/24

WOW laying the boom out like that... that carrier must have some real weight to it....
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  #52  
Old 12-10-2023, 07:59 AM
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Default Re: Liebherr LTM 1055 S-4 in scale 1/24

It is ready!
















Kerst
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  #53  
Old 12-10-2023, 11:05 AM
jerry56 jerry56 is offline
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Default Re: Liebherr LTM 1055 S-4 in scale 1/24

WOW That is a work of art.... I love that multi-part block
I'm glad there are builders like you to give hacks like myself something to shoot for... again great build...
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  #54  
Old 12-12-2023, 09:48 PM
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Default Re: Liebherr LTM 1055 S-4 in scale 1/24

A couple of quick videos, made on the kitchen table:

https://youtu.be/Yf0AuVcqYJo?si=HOU29ggKTSzArPpt
https://youtube.com/shorts/WwRdEdQPW...4KeW7bje270Kaw
https://youtu.be/NWTr-IJaTSs?si=_3czcIpchyQWzixG

Kerst
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  #55  
Old 12-13-2023, 12:17 PM
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Default Re: Liebherr LTM 1055 S-4 in scale 1/24

LOL... that all wheel steer is crazy...
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  #56  
Old 12-13-2023, 06:19 PM
Zabco Zabco is offline
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Default Re: Liebherr LTM 1055 S-4 in scale 1/24

Beautiful work, congratulations on another great build.
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