Liebherr LTM1800 scale 1/24

[kerst]

Dear all,

I have built 3 working scale models of cranes, a Manitowoc 4100W with Ringer (1/25), a 4600 S-5 (1/25) and a Krupp 180GMT (1/20) with counterweight truck.

In 2006 I started on a scale model of the Liebherr LTM1800 expecting about 10 years to complete it. I chose this crane because it has so many possibilities, both telescopic as lattice boom, derrick mast, etc.

The axles; it has 16x8 drive and I wanted to do this for the model as well. Steering is on 6 axles. I bought the differentials (Traxass) and built the axles around them. This saved me a lot of time and they turned out pretty good. The only disadvantage was that these differentials are a bit bulky for this scale.
http://img248.imageshack.us/img248/5228/ltm1800march20081fj1.jpg

I put a lot of strength (and thought) in the central part of the carrier frame, because all the forces are going through this part. It also needed to accommodate 2 drive axles and the slewing ring and the electrical controls need to go through the slewing ring to the upper.
http://img77.imageshack.us/img77/3647/img0398tz2.jpg

The slewing ring is almost an exact copy of the real one, same principal with the motor located in the rear of the carrier. It has an optional quick disconnect which raises the upper a bit, but makes it very easy to take the upper off. There are only a handful of real ones with this feature.
http://img523.imageshack.us/img523/4483/ltm1800november2008le9.jpg

I made the outriggers of steel, brazed together for strength. The outriggers have small geared motors inside and work with a spindle.
http://img528.imageshack.us/img528/6702/img0910fy7.jpg.
Here is a video of the outriggers:
http://www.youtube.com/watch?v=i1kol40B3ow

Most of the drive line is finished. It has 16x8 drive, a transfer box with 2 speeds and a central differential. I still have to make the main gearbox. The steering is done with a servo in the front. I am not sure if this servo is strong enough. It might need a stronger one.
http://img528.imageshack.us/img528/6702/img0910fy7.jpg

This picture shows the working outriggers and the upper almost finished. The upper is made entirely from AL and the winches have individual motors. The winches can be lifted out easily, like the real one. I choose to leave the second winch out and use the space for electrical stuff. I managed to make a device that pushes the A frame up till it is in a working position.

http://img820.imageshack.us/img820/9761/ltm18003917201013902pm.jpg

And this one shows the A frame being raised:
http://www.youtube.com/watch?v=mLI-NwKSGx4

Kerst

[kerst]

A few more images:
http://img441.imageshack.us/img441/7664/ltm1800mar2010.jpg
http://img57.imageshack.us/img57/5750/img1181.jpg

Kerst

[pugs]

Very impressive work. Looks like alot of thought went into it.

[SonoranWraith]

Looks amazing. So how many years in are you? ;)

[tc1cat]

All I can say is WOW!!! And everyone says I am detail crazy! Your drivetrain looks incredible.

[kerst]

More pictures:
http://img222.imageshack.us/img222/3329/img1169n.jpg
http://img67.imageshack.us/img67/4176/img1178.jpg
http://img151.imageshack.us/img151/1646/img1185a.jpg
http://img261.imageshack.us/img261/7140/ltm18004917201013936pm.jpg

Kerst

[kerst]

outrigger motor:
http://img687.imageshack.us/img687/2062/image6lz.jpg

Kerst

[Roadmasters]

absolutly amazing

[pugs]

Amazing workarounds for the size limitations and still make it look and function like real thing!

[9W Monighan]

I'm ssoo glad you got the clearance to come aboard this forum now. Your work is jaw dropping. I've been waiting for your post. Can you show everybody the other cranes?

[Finster]

I love the outrigger solution. Very clever! Outstanding job overall on this model.

In some of the pictures I I see what looks like a homemade transmission but I'm a little confused. Does it contain a differential? If so why, I'm not sure I understand it's purpose. Thanks.

[kerst]

I love the outrigger solution. Very clever! Outstanding job overall on this model.

In some of the pictures I I see what looks like a homemade transmission but I'm a little confused. Does it contain a differential? If so why, I'm not sure I understand it's purpose. Thanks.

It is a differential and the purpose is to divide the power between the rear 2 axles and the front 2 axles. This way it will have permanent 8 wheel drive.

Kerst

[SmallHaul]

Very nice work. The 2 speeds trans is a nice touch, you are not cuttings corners anywhere!:cool:

[kerst]

Thanks everybody for the compliments and the encouraging words!
I will keep you updated, but have patience, it will take time, it is a slow process and i don't have a lot of time to build. Luckily i have a corner of my workplace for building my cranes and that gives me the opportunity to often spend 20 minutes after work working on the LTM1800.

Kerst

[kerst]

I'm ssoo glad you got the clearance to come aboard this forum now. Your work is jaw dropping. I've been waiting for your post. Can you show everybody the other cranes?

Here is a link to a photo album with pictures of my (more or less) finished scale models.


In 1/25 Manitowoc 4100W also with Ringer,
In 1/20 Krupp 180GMT,
In 1/20 mercedes truck 2644 with 5 axle Goldhofer trailer for the counterweights.
In 1/25 Liebherr LTM1800
In 1/35 Demag TC 600 (non motorized)




http://picasaweb.google.com/kerstdejong3/ScaleModels#

Kerst

[dirtpusher9]

Kerst, I'm glad you made it over here. I really like the 4100 ringer, that is something. Do you have a video of it working, I didn't see it? Your work is incredible, look forward to more.

[CorbettTrailers]

absolutly amazing

I second that!

[bigford]

the WOW factor is really up there

[Espeefan]

Wow. Most impressive! I can't over the fact that it's only 1/24 scale, which seems so small, but that has to present enough challanges by itself. I would think a crane like this would be easier to built in 1/16 or 1/14 scale, but then it would be a monster! The drivetrain is incredible, considering the size. I'm amazed that you are able to pull it off because of the size. Awesome.

[BigZracingRC]

THAT IS SO AMAZING! what tools are you using to make this?

thanks

zach

[Tamiya Cowboy]

WOW! How did I miss this build.. I am at a loss of words by your ability's you have for building..Cant wait to see more progress.[/I]

[mog]

wow your doing a really nice job on it keep up the good work.

[Southgate]

This is too much! At least I can rest assured now that i'm not the only one nuts enough to tackle an operating crane in 1/24-1/25. I didn't know there were cranes posted in this section of the forum. I assumed they'd be in the "Construction Equipt", so I posted mine there. You should post a link to this crane there too, I know some of us tend to stay close to a given section of the forum, and can miss something great like this. It's amazing the differing approaches to achieve the same results on something. That differential transmission is unbelievable.
I'll definately be checking out your other work, but it's late now, I gotta hit the hay. Here'm mine if you want to take a look:
http://www.rctruckandconstruction.com/showthread.php?t=203

I didn't know forums like this existed, as i was looking in the wrong places, I guess! I have to say, your crane is inspirational! Dan

[mazdaparts]

This is an amazing build, I'm feel like I'm way outclassed here. Like I went to the corvett rally at bowling green plant in a pacer.

[kerst]

Progress has been slow, too many other things to do.
But i managed to make the cab for the upper.
http://img825.imageshack.us/img825/5063/ltm1800cab1110201011253.jpg
here is a link:
http://picasaweb.google.com/lh/photo/DiDKKk-k6fLgLDKAQ2ItiQ?feat=directlink

Kerst

[9W Monighan]

This is an amazing build, I'm feel like I'm way outclassed here. Like I went to the corvett rally at bowling green plant in a pacer.

Sorry Kerst I just had to:D
http://www.amcpacer.com/images/archives/mcrawford-5.jpg

http://image.fourwheeler.com/f/8949617/129_0608_02_z+1978_amc_pacer+front_passeger_side_v iew.jpg

[kerst]

Sorry Kerst I just had to:D
http://www.amcpacer.com/images/archives/mcrawford-5.jpg



is that you?

[Southgate]

Hey, Kerst, I took a look at a couple of the videos. I'm a little puzzled as to how your upper unit is going to operate, but obviously you have it down. Watching the outriggers lift the whole thing is awesome! What are you using for the cable in your rigging? Dan

[kerst]

Hi Dan,
Each drum has its own motor(s) and the swing motor is located in the carrier, like the real crane. i will lead all the electrics through he slewing ring and have a socket in the carrier to connect to a remote control box, so it will be remote, but not radio control. i am not sure yet where to put this socket in the carrier. For the steering of the wheels I use a servo and a servo tester. There just is no space for all the gear needed for RC control and I mostly operate it on a table, so it is not going so far.
I am using 1 mm nylon cable. I use it on all my cranes and it is both strong and flexible.
The controls for the outriggers are on the right side behind the carrier cab. just fitted!

Kerst

[russisloud]

this really is killer! i need to get back on my crane.....

[Southgate]

Where do you get this nylon cable? Sounds exactly like what I need. I've been using silk fishing line, probably made in the '60s. Strong and round, but MAN is it hard to find. Does the nylon cable come in larger sizes that you know of?

[kerst]

Where do you get this nylon cable? Sounds exactly like what I need. I've been using silk fishing line, probably made in the '60s. Strong and round, but MAN is it hard to find. Does the nylon cable come in larger sizes that you know of?

I bought it more than 15 years ago in Britain @ RS Components. It came in a 500 meter reel, which is a life time supply for me.

Kerst

[Espeefan]

Progress has been slow, too many other things to do.
But i managed to make the cab for the upper.
http://img825.imageshack.us/img825/5063/ltm1800cab1110201011253.jpg
here is a link:
http://picasaweb.google.com/lh/photo/DiDKKk-k6fLgLDKAQ2ItiQ?feat=directlink

Kerst

Very impressive, Kerst! The cab looks fantastic, and I can see things coming together nicely, even if it's a bit slow. What gauge of aluminum did you use to make the cab, and how did you cut the windows out so cleanly? The whole super structure is just amazing.

[kerst]

Very impressive, Kerst! The cab looks fantastic, and I can see things coming together nicely, even if it's a bit slow. What gauge of aluminum did you use to make the cab, and how did you cut the windows out so cleanly? The whole super structure is just amazing.

The cab is made of 1/8" and 1/16' AL and I used my mill to do the windows.
Slow, bur a lot of fun for me!

Thanks for your comments,

kerst

[Hammer Down Trucker]

That is nice

[kerst]

I haven’t had much time during December, too busy, but I found bits of time and I worked on the electrical system. At the heart of this is the rotary connector, which I built from scratch.
I will use the same control console as I use for my Krupp 180GMT and I put the connectors underneath one of the outriggers, not very elegant, but it was the only option. On the picture one can also see the swing motor tucked in above the rear bogie.
The rotary connector has 4 sockets, so I can simply plug in the motors in the upper.

http://img577.imageshack.us/img577/9271/ltm1800rotaryconnector1.jpg

http://img21.imageshack.us/img21/4643/img2088cj.jpg


kerst

[9W Monighan]

I originally was going to make my own collector rings but found one that suited.
Looking at your picture; Is the brass soldered to the aluminum? I've never tried to do that before.

[kerst]

I originally was going to make my own collector rings but found one that suited.
Looking at your picture; Is the brass soldered to the aluminum? I've never tried to do that before.

The rings are brass and the wires are soldered to this ring directly (inside). the pins are steel with wires soldered to them. I used the torch for that! All the rest is plastic.

Kerst

[doodlebug]

Hey Kerst, thank's for posting the picture's! Back in 1987 at the Conexpo Conag show, somebody brought a large layout with working crane's in your scale. Can't remember his name, but alway's incredible! I missed every time, he operated them. Found out through one of the trade rag's, what I really missed at the show. Any other contractor's remember this? Later, Neil#2 aka doodlebug.

[kerst]

I originally was going to make my own collector rings but found one that suited.
Looking at your picture; Is the brass soldered to the aluminum? I've never tried to do that before.
.
Oh, did you mean the frame?
I glued the Al and brass together, but for strength a 1/4' bolt connects the brass with the center ring, a similar setup like pre-stressed concrete.
I like to use AL, because it is light and easy to work with and i found very good glue. But i don't rely completely on the glue; I mostly add bolts.
i made the outrigger beams from steel, because I wanted a lot of strength there.
I plan to make the telescopic boom from AL too. it should work and it will flex a lot more than steel. And i would like to achieve that effect.

Kerst

[Stuff]

Wow! very impressive!!!

[Finster]

Great work! Very impressive build. What kind of glue do you use for the Al and brass? Do you need to do any prep work to the material before you glue it?

[scalelover]

This is definetly one of the top builds going on, the time it would take even working daily for longer periods is asthonishing. So keep up the great work and I will stay tuned for the additional ...... years to finish it....

--Dan

[D8R]

Nice model, impressive. Hmm, 10 years, sounds familiar.
Dan

[kerst]

A little update. I haven't had too much time lately between vacation, work and a huge ice storm.
I mainly worked on the drive train of the carrier. I bought a 540 motor with a reduction case attached (No, I did not make it myself, i am getting lazy), which fits perfectly.
then i did a test run and it worked great with the 2 speed auxiliary gearbox, but it lacked a low low speed, it just went too fast for moving it fully rigged.
So I decided to add a gear box which I bolted to the existing one, giving the option of an extra 1 in 4 reduction and a total of 4 speeds. That should do it! It is almost ready, most of the parts are there.
http://img847.imageshack.us/img847/5508/gearboxltm1800315201191.jpg

Kerst

[kerst]

Gearbox is ready. It provides me with the Low-Low I need for moving the thing fully rigged and also with a few faster speeds. There is a factor 10 difference between the lowest and the highest gear.
http://img819.imageshack.us/img819/9430/gearboxexposed318201155.jpg
http://img861.imageshack.us/img861/5686/gearboxcarrier319201152.jpg


Kerst

[9W Monighan]

I LOVE GEARS!:eek: That is quite some assembly you have there!

[kerst]

I made a short video of the first test drive. It is going in Low-Low with the motor running at full rpm's
http://www.youtube.com/watch?v=Zw_bQFV9amw

Kerst

[9W Monighan]

Wow that is really cool to watch. I don't think I ever saw a 1:1 version turning that tight. That really works nice.

[pugs]

Very cool vid.

[kerst]

Videos like that are what make the build all worth while, WELL DONE!!!
I was pleasantly suppressed, I couldn’t see any play in the steering linkages as the wheels turned, I know how hard that is to achieve,
Tim

Thanks for the comment, but there is some play for sure and the 2 rear axles are a bit out of line. They steer a bit too much to one side, but I will adjust that later.
Now I have to fix the motor in place, it was sitting loose in the carrier!

I am not very good with RC, but it would be nice to have it remote controlled, then I could drive it at full speed. In the highest gear it would go the 1/1 equivalent of about 12Mph. I am thinking of making a module that would fit in the upper in the space of the winches. These can be taken out and then there is quite a bit of space..

Kerst

[kerst]

After I finished the gearbox I put it all together.
Although there are still a million details to be done it is time to work on the boom now. Exciting!

http://img836.imageshack.us/img836/4377/ltm1800328201152005pm.jpg

kerst

[Southgate]

Exiting, I'll say!!!! It's a rush to see a well designed and engineered piece of machinery work for the first time, isn't it? Great work so far. Just unbeleivable. Dan

[kerst]

While waiting for the AL sheets to arrive I made the 235-ton hook block. I had very little (none!) information to help me and I had to somehow get some measurements from pictures. And now it’s finished I think it is not quite right. I might change the whole thing again.
http://img705.imageshack.us/img705/3562/hookblockltm18003428201.jpg
http://img862.imageshack.us/img862/4820/hookblockltm18004282011.jpg

I also made a first mock-up of the boom, just to try out if it works. I am using 0.032” Al sheet. I bend the lower part and the upper part separately and then glued the two together. It seems to work and it is quite strong.
http://img269.imageshack.us/img269/5778/boomtrial428201123406pm.jpg

Kerst

[texken]

Looking Good.
Did you say what Glue you used to glue AL.

TEXKEN

[kerst]

Looking Good.
Did you say what Glue you used to glue AL.

TEXKEN

just look at the picture in post #54, the bottles are standing in the back ground. It is really good stuff, very strong.

kerst

[kerst]

just look at the picture in post #54, the bottles are standing in the back ground. It is really good stuff, very strong.

kerst

this is the eBay store: http://shop.ebay.com/polymerproducts/m.html?_nkw=&_armrs=1&_from=&_ipg=100

Kerst

[Southgate]

Even if you're not sure about that 235 ton block, the craftsmanship on it is just beautiful.

[TruckCentral]

Even if you're not sure about that 235 ton block, the craftsmanship on it is just beautiful.

I would have to agree.. To the un"craned" eye you wouldnt even know. Very impressive so far.

[kerst]

That's better:
http://img687.imageshack.us/img687/2676/ltm1800block51201180351.jpg
I made the block about 1/4" shorter and now the proportions are better. I am happy now!

kerst

[SonoranWraith]

Looks sweet!

[Southgate]

That is a jewel. Makes me wanna go machine something.

[9W Monighan]

That block really turned out nice Kerst. Do you think glue will hold up to time on that boom section?

[kerst]

That block really turned out nice Kerst. Do you think glue will hold up to time on that boom section?

I am confident that the glue will hold up. the glue surface is large and the stresses are minimal there.

kerst

[kerst]

For once I have the feeling that I made a lot of progress. I glued the 4 boom sections together and i am quite happy with the result.
As you can see there is still lots to do.
http://img694.imageshack.us/img694/5828/ltm1800boom515201121220.jpg
http://img705.imageshack.us/img705/5012/ltm1800boominside515201.jpg
Kerst

[Azorean]

WOW. amazing job

Looking really great

Keep the good job.

[kerst]

I worked on the boom a bit. It is pretty straightforward, but I haven't had too much time lately. Here are 2 pictures of the progress i made:
http://img146.imageshack.us/img146/7215/img3081c.jpg
http://img843.imageshack.us/img843/2331/ltm1800boom617201124049.jpg

Kerst

[Azorean]

WOW... Amazing work!!! Really...

[kerst]

Drilling the holes for the boom pins:
http://img546.imageshack.us/img546/5445/drillingboom26172011607.jpg

Kerst

[el barto]

more than just perfect!

[kerst]

Thanks for the compliments!
I managed to do a lot of work on the boom. All 4 sections are ready and the boom head is almost ready. Next is the telescope mechanism. I think it is going to be a variation on the single cylinder system.
http://img268.imageshack.us/img268/3066/img3138tu.jpg
http://img32.imageshack.us/img32/4030/img3140f.jpg
http://img135.imageshack.us/img135/1559/img3143q.jpg

I put it all together and tried it out. Here is a short clip: http://www.youtube.com/watch?v=CgFCE_C24eM

Kerst

[Bsorenson79]

Whats to say but TALENT!!!

[doodlebug]

Wow, what a beast.
Later, Neil#2 aka doodlebug.

[kyleandtavion]

Wow man you have some serious talent and time

[kerst]

Wow man you have some serious talent and time

i have maybe about 4 hours a week. It is my quality time, nobody around. Great! helps me to re-charge.

Thanks for the compliments,

Kerst

[siuvinson]

really great looking build Kerst! All of the thought and creativity put into this thing is way beyond my ability, which makes it even more fun for me to follow along!

would you mind sharing where you got the tires for your rig from?

[kerst]

I did a lot of fixing. there were problems with the electric feed through the slewing ring, the gearbox jammed and I fixed the main winch, which did not run smoothly. One of the outriggers was not working and so on.
I also started designing the telescoping mechanism. i will be using the oil tanks on the side of the boom to hide 2 motors, which will drive a single spindle, which will be able to rotate 45 degrees either way and in this way pick up one of the 3 sections, basically simplified way the modern cranes work.

I made a few videos, not great quality, but they show the first trials.
http://www.youtube.com/watch?v=ykWapUiaxGA
http://www.youtube.com/watch?v=prlzG1XcgoQ
http://www.youtube.com/watch?v=T6hGbbX0zFA
Kerst

[YoungGunz]

very cool... nice videos, this will be one piece everyone drools over

[kerst]

Here another video, this time the crane is going up a ramp in low gear. The 16 x 8 drive is hardly sufficient.
http://www.youtube.com/watch?v=yXltOC-Ifas

Kerst

[YoungGunz]

pretty cool video.. awfully slow... how much do you think it weighs??

[Pippoe]

Very nice video!!

You should think about locking one axle.. number 5 for instance!

Cheers

Pip

[dirtpusher9]

Nice video, Kerst. That block swinging that close to your operator's cab could make him very nervous if he was along for the ride.lol Still ready to see this thing make a lift.

[4EX]

amazing build, would love to see it in 1/14!

[kerst]

Progress has been slow during the summer.
I mainly worked on many details and little improvements everywhere.
On the upper I added 3 outlets, 2 in the front and one in the back for functions like the telescoping and luffing winch for when the derrick mast is attached.
I also added a couple of switches ( a toggle switch and a 3 position rotary switch) on the upper (2nd picture) to switch between functions. I have only 3 2-pole circuits coming through the slewing ring. This way i can switch between functions.
http://img195.imageshack.us/img195/5060/ltm1800upperfront913201.jpg
http://img196.imageshack.us/img196/5831/ltm1800upperrear9132011.jpg

Kerst

[aussierolla]

i've been watch this build from the begining and have seen all the video's and cant wait to see the final product as this crane is becoming a peace of art .

[DuelTruckDriver]

This is just unbelievable, can't believe I'm just now seeing this!:eek: I've never in my life seen anything this hardcore built. Kerst, you truly are a professional I envy your abilities man:D >Marty<

[kerst]

This is just unbelievable, can't believe I'm just now seeing this!:eek: I've never in my life seen anything this hardcore built. Kerst, you truly are a professional I envy your abilities man:D >Marty<

Thanks,

kerst

[Roadmasters]

The quality represented here is outstanding, looking foward to the next installment

[fyrbuilder]

This is truly one awesome build. It hasanswered a few questions I had on how to do my build. You have done a great job....can;t wait for the next post on it!

[kerst]

I spent the past month figuring out the mechanism to extend the 3 boom sections.
It is somehow based on the Liebherr system, one section at the time. I use a spindle, which propels 2 pins, which can hook into the bottom of each section and push it up. The whole assembly can rotate and with 3 positions available I can choose which section to extend. the motor is mounted on the side of the boom where the real one has an oil tank for the same function. Once in place the sections get locked manually.
http://img23.imageshack.us/img23/3415/ltm1800telescope2102520.jpg
http://img844.imageshack.us/img844/3783/ltm1800telescope1102520.jpg
kerst

[9W Monighan]

Very interesting. I confused on the timing of each section though. I see you are using a fast lead screw to advance the sections. Does it have multiple leads? More pictures when you get a chance.

[kerst]

Very interesting. I confused on the timing of each section though. I see you are using a fast lead screw to advance the sections. Does it have multiple leads? More pictures when you get a chance.

I find it hard to describe in words how it is going to work.
To reach full boom length the last section goes out first, then the one but last and then the second one.
I am using a hi-lead screw (http://www.roton.com/Mating_Components.aspx?family=7060762) with multiple leads just to speed it up a bit. It has to travel about 22" for each section and it will take about 25 - 30 seconds for each. I think one motor will do it, but there is the option to have another motor on the other side (easy to add). This screw has a high efficiency. I tried it by hand and it works very nicely. I chose this screw partly to keep the weight down. An 3/8" acme screw is sooo heavy and has a lower efficiency.

I will make some more pictures later.

kerst

[xilence]

What an amazing piece of art. I always find it wonderful to see when somebody can build something like that. Awesome!! :cool:

[kerst]

I tried it out and it works quite smoothly, but one motor is not enough, so I added the other motor. Here is a picture of the assembly:
http://img577.imageshack.us/img577/5749/ltm1800boom111620118095.jpg


Kerst

[Southgate]

Amazing stuff, Kerst. Serious machinery here, and working in 1/24 scale only makes it that much more impressive. I watched the video. I've always loved the look of the reeving on 1/1 cranes, and yours definately captures the effect! I'm building a crane too, and your engineering skills humble me.

[SWAGGER]

Oh my God! There aren't even words. Simply mind blowing!!!

[kerst]

I worked on the boom quite a bit. The telescoping mechanism is ready and I did some detailing, which is almost finished.
Next I will be testing the boom and getting ready for the Cabin Fever Expo in January.

http://img705.imageshack.us/img705/431/boom1210201144458pm.jpg
http://img854.imageshack.us/img854/4036/img0273pq.jpg

Kerst

[9W Monighan]

Looking good Kerst. Keep at it I know I am too. Can't wait to see this and all of your cranes in person.

[pigeonfarmboy]

Cant wait to see video of the telescope mounted to the truck! Epic build sir!

[crawler07]

Most impressive Sir! I hope you will post alot of videos from cabin fever! I know im not the only one who want to see this rig in action!

[kerst]

Thank you all for all the compliments and encouragements!

I am preparing the crane for the Cabin Fever Expo. I just assembled it and testing the essential functions. off course half of the functions don't work, so there is a lot of fixing to be done and I will bring a lot of tools to the show.
http://img52.imageshack.us/img52/4746/ltm1800dec302011.jpg
Kerst

[9W Monighan]

Nothing wrong with working on your projects at the show. I was hesitant to bring my dragline years ago while it was in it's earlier stages of build but,Gary who puts the show on said bring it in. He figured there are a lot of models sitting in cars out in the parking lot who's owners are afraid of showing "work in progress"

[kerst]

Nothing wrong with working on your projects at the show. I was hesitant to bring my dragline years ago while it was in it's earlier stages of build but,Gary who puts the show on said bring it in. He figured there are a lot of models sitting in cars out in the parking lot who's owners are afraid of showing "work in progress"

I always bring tools and spare parts, because everything, finished or not, can break. During shows my models get to do a lot of work, at home they just sit in boxes.
Often people appreciate the works in progress more than the finished models. They give a better impression on how they come about.
Looking forward!

Kerst

[SmallHaul]

That is fantastic that you are bringing your crane to the show! I am looking forward to seeing it in person.

I agree with bringing spare parts and tools. I am very hard on my equipment as well and usually break something at a show.

[kerst]

I enjoyed the Cabin fever Expo tremendously. It gave me the chance to try everything out, play with my cranes and meet lots of great people. It was a great weekend, but afterwards I had to catch up with a few other things, so I didn't have much time for the LTM1800 till about a week ago.
I started working on the counterweights. I make them out of AL, which is a bit on the light side, but the whole crane turned out a bit too heavy, so that compensates nicely and AL is easy to work with. The total weight of what you see on the picture is around 14 Lbs.
It is an easy job, but time intensive with lots of (hand) sawing and lots of milling.

http://img813.imageshack.us/img813/9918/cvltm35201251522pm.jpg

Kerst

[BRICKNICK]

Holy crap man, this thing is friggin amazing......you are a serious craftsmen my friend, excellent job.

[kerst]

Still working on the counterweights:
http://farm7.staticflickr.com/6233/7001578535_5c68a875e3_b.jpg

Kerst

[Kaf343]

Wow sir, this in increadable build. I have never seen anything like it.

[cyanide]

Wonderfull build. Very, very nice.
I too only get about 4 hours a week to work on my models. The upside is there is plenty of time to mull over ideas between working on the metal. If I don't get my weekly afternoon in the workshop I feel disapointed.

[dabears]

WOW!! Amazing work so far that is one of the coolest builds ive seen

[kerst]

Summer is usually slow with lots of other distractions, but I did find some time to work on the LTM1800.
I have worked on the Derrick mast. This set http://www.flickr.com/photos/dickvandamme/sets/72157623977660719/with/4622268767/ shows the LTM1800 with Derrick mast.

This is the butt being out together:
http://farm8.staticflickr.com/7128/7867981208_2253b6af6f_b.jpg
These are the sides of the 14 m middle piece:
http://farm9.staticflickr.com/8431/7867980588_eed264f347_b.jpg
and this is the setup for milling the chords:
http://farm8.staticflickr.com/7278/7867982412_9e529f06ce_b.jpg

Kerst

[speedy8305]

great build I am in the processof building a manitowoc 18000 been building it for 5 yrs still have a long way to go I am building it from poplar wood but after seeing your build I must say fantastic work

[kerst]

After a lot of straightening out it is coming together:
http://farm9.staticflickr.com/8440/7895063668_0815a7a5df_b.jpg

Kerst

[9W Monighan]

I feel your pain. Did you use fixtures like I did? I had some warping in my boom but fixed it by clamping the whole section to my metal shear's table then ran my jewelers torch back and forth quickly heating up all of the solder joints and just about all were realigned.

[kerst]

I feel your pain. Did you use fixtures like I did? I had some warping in my boom but fixed it by clamping the whole section to my metal shear's table then ran my jewelers torch back and forth quickly heating up all of the solder joints and just about all were realigned.

I did the same with a combination of clamps and weights, carefully heating up the whole section.
I had the advantage of well fitting joints so there was little danger of everything falling apart.
But it took me 4 or 5 times to get it all straight.

kerst

[PROBUILDER1964]

HOLY S#** what a beautiful piece of equipment you got there ! WOW !!!!!!! I'm impressed my friend ! Please keep us updated on the progress....

[dabears]

awesome brass work!! Those are some crazy skills

[speedy8305]

very nice butt section I havent got that far yet

[Southgate]

I just caught up with this project again. That boom looks great so far. Lotsa fitting and such. Patience pays off, huh?

[speedy8305]

Like I said before Very nice work you have there very impressive

[crazy4yachts]

Man I love cranes this is one amazing model what a gift you have. I remember seeing a one off on ebay it was huge I think it was either a 1/4 scale or 1/8 but it was really big. I think the guy was asking 75K and he would come to the buyers house and assemble it for free. Anyway nice work you are doing a awesome job !



Crazy4yachts

[kerst]

Getting there. I am finishing off some details on the derrick mast.
http://farm9.staticflickr.com/8030/8071610562_cc0948abde_b.jpg

kerst

[sparkycuda]

Wow, that boom foot-section looks great! Very complicated fitting and soldering that many pieces together. Keep up the fine work.

Ken

[kerst]

A month later.
After the soldering of the derrick mast was done, I cleaned it all up and started on all the hardware, like sheaves, pendants, etc. that was quite a bit of work, not difficult, but fiddly. I made the pendants of 1/8” square steel bar with the ends brazed on. Most of the hardware is done and soon I will be able to put it together and try it out!
Here some pictures:
http://farm9.staticflickr.com/8206/8183879420_c6f9d6249c_b.jpg
http://farm9.staticflickr.com/8341/8183843399_db1f286a0d_b.jpg
http://farm9.staticflickr.com/8202/8183879220_de9974a002_b.jpg

Kerst

[kerst]

I had enough time this weekend to put it all together. There are still quite a few details to finish, but this is a great opportunity to make a list and see what needs to be adjusted or fixed.
http://farm9.staticflickr.com/8337/8214271702_bffc69b934_b.jpg
http://farm9.staticflickr.com/8477/8214271460_1fbb01caf2_b.jpg
http://farm9.staticflickr.com/8478/8213183963_d14f30872e_b.jpg
http://farm9.staticflickr.com/8343/8214270622_2114e4cba6_b.jpg

Kerst

[Southgate]

I had enough time this weekend to put it all together. There are still quite a few details to finish, but this is a great opportunity to make a list and see what needs to be adjusted or fixed.
Kerst

It's quite a process, isn't it! I just spent last night remotoring one of my drums, and turning an internal piece that mounts them better and doing other little tweaks to improve operation. So I know what you mean. I'm sure eveyone on this forum does.

That mast is just beautiful. It would make an awesome load on a lowboy trailer with a counterweight or two. Well everything is beautiful! The herkiness of this whole machine is incredible.

[Pippoe]

Impressive crane!

Great job. A real eye-catcher.

Cheers

Pip

[kerst]

Thanks for the nice words.
It is quite a milestone and I found myself just staring at it for a long time during the weekend, just taking in the result after about 6 years of work.
I took it down again and I can start finishing the missing details.

Kerst

[Southgate]

Thanks for the nice words.
It is quite a milestone and I found myself just staring at it for a long time during the weekend, just taking in the result after about 6 years of work.
I took it down again and I can start finishing the missing details.

Kerst

There are some interesting parallels goin' on here. I've been on my crane for 6 years, I am at about the same stage of completion, and, I sometimes stare at it, especially against strong back light. Is that wierd? (mine's posted in construction eqiopment) I hafta say, watching you make progress on yours makes me wanna go work on mine! Dan

[Southgate]

Kerst, I have a question for you. I have seen your crane run on Youtube. It runs great, but I noticed you don't have variable speed control. Is that something you'd be interested in doing, and have plans for? When my crane was tethered, I used a modified MRC model railroad power pack to operate, and it's nice to have the variable speeds. If you're interested, I can talk you through building up a pack. Building a battery powered pack is not difficult either. Dan

[kerst]

Kerst, I have a question for you. I have seen your crane run on Youtube. It runs great, but I noticed you don't have variable speed control. Is that something you'd be interested in doing, and have plans for? When my crane was tethered, I used a modified MRC model railroad power pack to operate, and it's nice to have the variable speeds. If you're interested, I can talk you through building up a pack. Building a battery powered pack is not difficult either. Dan

For my cranes I designed a control box from where I can control all electrical functions, both for the carrier as for the crane.
I have some variable speed control using a mechanical resistor speed control. This works well with the bigger motors, like the carrier motor, but has very limited effect on the smaller motors, which I use for the winches.
This is an area I always struggle with and I am open for ideas.

Thanks,

Kerst

[Southgate]

If you go back to my crane's history, you'll see I had built my controls into an MRC power packj. It has transistorized throttle. A transistor controls VOLTAGE, whereas a mechanical resistor (rheostat. if it's variable) limits CURRENT. The prob with that is if the winches use a very small amount of current, the rheostat doesnt limit it enough, or do so consistently under varying loads.

A transistor control is really easy to make, and inexpensive. I have a box of stuff, enough to experiment with so I can go make a test circuit and give ya a rundown on how to build one up for your crane.

[Southgate]

Hey, Kerst. I finally got some time to sit down and play with electronics. The question now is, do you want to set up separate speed controls for each function? Or you could set up one speed control for the carrier and separate speeds for each function of the upper. Can do anything, really. I'd recommend at least each drum has it's own speed control. That way you can walk the hook when booming up, etc.

Each speed control will require a 25K ohm linear taper potentiometer, and a 1000 ohm resistor, and a TIP 120 transistor. You obviousely know how to wire DPDT switches for direction. Adding the speed controls is pretty easy.

I can draw up the schematic for just the speed controllers and let you adapt them, or i can draw it up for the whole complete power pack.

Pot:
http://www.mouser.com/ProductDetail/Bourns/PDA241-HRT02-253B0/?qs=sGAEpiMZZMtC25l1F4XBU7IVlqK8DuF3tEa96VlWu4c%3d

Transistor:
http://www.mouser.com/ProductDetail/Fairchild-Semiconductor/TIP120/?qs=sGAEpiMZZMutXGli8Ay4kMWWqaXtuV%2fOFOxXz1dSDIw% 3d

Resistors
http://www.mouser.com/ProductDetail/Kamaya/RC1-4473JB/?qs=sGAEpiMZZMuDPtTs5Gda260u%252bQsOF0S4LP%252bdlQ PAamo%3d

I found this source online, but I recon you probably have well stocked electronics stores there in NY. The pots will probably be the hardest to find, the transistors and resistors are really common items.

[kerst]

Hey, Kerst. I finally got some time to sit down and play with electronics. The question now is, do you want to set up separate speed controls for each function? Or you could set up one speed control for the carrier and separate speeds for each function of the upper. Can do anything, really. I'd recommend at least each drum has it's own speed control. That way you can walk the hook when booming up, etc.

Each speed control will require a 25K ohm linear taper potentiometer, and a 1000 ohm resistor, and a TIP 120 transistor. You obviousely know how to wire DPDT switches for direction. Adding the speed controls is pretty easy.

I can draw up the schematic for just the speed controllers and let you adapt them, or i can draw it up for the whole complete power pack.

Pot:
http://www.mouser.com/ProductDetail/Bourns/PDA241-HRT02-253B0/?qs=sGAEpiMZZMtC25l1F4XBU7IVlqK8DuF3tEa96VlWu4c%3d

Transistor:
http://www.mouser.com/ProductDetail/Fairchild-Semiconductor/TIP120/?qs=sGAEpiMZZMutXGli8Ay4kMWWqaXtuV%2fOFOxXz1dSDIw% 3d

Resistors
http://www.mouser.com/ProductDetail/Kamaya/RC1-4473JB/?qs=sGAEpiMZZMuDPtTs5Gda260u%252bQsOF0S4LP%252bdlQ PAamo%3d

I found this source online, but I recon you probably have well stocked electronics stores there in NY. The pots will probably be the hardest to find, the transistors and resistors are really common items.

Thanks a lot for all this info! It is very helpful!
I found a used MRC power pack on eBay and i am going to experiment with that first.
At the moment I am struggling with the slip rings. One of the circuits is not working and so I took it all apart and am considering to rebuilt the whole thing and make it more dependable. But I will be away for the Holidays so it going to be January before I get to it.

kerst

[Southgate]

What is a slip ring? Is it electrical? Guess what. I used an MRC Power pack to make my controller when my crane was tethered! It works well. That's basically the circuit I copied in making up these parts lists, and a controller that is used in my upper unit.

I put my paddle switches in the MRC box, and wired them to a cat 5 phone jack. That only allows for 4 functions though, just the upper unit. I still plan to use it on another project. The ammeter on the right unplugs and pulls out. The pack can also be hooked up to a battery pack so plugging it in is optional. Handy at shows.

http://i343.photobucket.com/albums/o476/Southgate_08/VariousPictures020-2.jpg

Spaghetti, anyone?
http://i343.photobucket.com/albums/o476/Southgate_08/VariousPictures019.jpg

Cat 5 plug keeps it clean. The power cord was cut down to just the plug, too. No cord to drag around when its hooked up to the battery pack.
http://i343.photobucket.com/albums/o476/Southgate_08/VariousPictures021-1.jpg

[kerst]

I am still working on the slip ring. There was a short somewhere in the slip ring and i couldn't find it. I worked on it for hours and in the end I decided to replace a few parts and in the process I made a better setup for the plugs. I am still waiting for some parts before I can put in together again. Hopefully it is going to work!
http://farm9.staticflickr.com/8071/8297027199_75e445386b_b.jpg
I bought a MRC POWER PACK 1370 transformer and that is a great improvement. It gives excellent speed control. I haven't tested it on the bigger motors under load, but I think it will be up for the challenge.
After the Christmas break I am going to integrate it all.

Kerst

[Southgate]

I can't quite figure out how those components work.

I used these pogo pins riding on a series of rings cut into a sheet of copper clad (used for printed circuit) If you think these pins could be useful, I have plenty to share.
http://i343.photobucket.com/albums/o476/Southgate_08/P5080047.jpg

http://i343.photobucket.com/albums/o476/Southgate_08/PB290073-1.jpg

http://i343.photobucket.com/albums/o476/Southgate_08/PB290074.jpg

[Scottyboy436]

Thats a fantastic model crane :D
What thickeness of string you using ?

[dabears]

I love this build keep up the great Work!

[kerst]

Lately I have been busy with finishing lots of details, including installing the lights and finishing the carrier cab. It is quite a challenge to find space for all the wires as you can see.
http://farm9.staticflickr.com/8053/8418341464_4a7d7505da_b.jpg
http://farm9.staticflickr.com/8049/8417247215_ebeed71585_b.jpg
http://farm9.staticflickr.com/8354/8417247979_b85a49c518_b.jpg
http://farm9.staticflickr.com/8329/8418339144_d5c3010d2e_b.jpg

Kerst

[Southgate]

Lately I have been busy with finishing lots of details, including installing the lights and finishing the carrier cab. It is quite a challenge to find space for all the wires as you can see.

Kerst

I can relate. My crane is packed under the bodywork with mechaincals and wire. Yours is looking great, nice to see you back at it. Dan

[kerst]

Testing the LTM1800 with derrick.
I rigged the crane this weekend and did the first testing. The object was a 22 Lbs chuck. Luckily nothing broke, but I was surprised at the amount of movement in the carrier and the outriggers. The video gives an impression. (Watch the dial at the foot outrigger)
http://www.youtube.com/watch?v=tHOLoBGLoJU&list=UU5RYqPrhaONGMvSKesd5Gjg&index=2
Here some pictures of the setup. Although I took care of a lot of details, there is still work left.
http://farm9.staticflickr.com/8091/8586276000_c269a69c60_b.jpg
http://farm9.staticflickr.com/8112/8586275634_0045db9e71_b.jpg
http://farm9.staticflickr.com/8527/8585172751_06850bd9e2_b.jpg
http://farm9.staticflickr.com/8371/8586277090_e29b6867e8_b.jpg


Kerst

[9W Monighan]

Looking good Kerst. Can't wait to see it in 3 weeks.

[kerst]

I did some final details, like the chains for lifting the boom to self-install it. I found some decent chain, classified as jewelry, but it works fine for this purpose. The cylinder doesn't work and that is no real problem. It limits the horizontal movement a bit.
http://farm8.staticflickr.com/7282/8738746331_7576d74a2c_b.jpg

Kerst

[kerst]

The painting has started!
http://farm6.staticflickr.com/5450/8916943001_317e1f3db5_b.jpg

Kerst

[louie r/c nut]

Excellent work

[kerst]

Still painting:

http://farm9.staticflickr.com/8419/8961026433_c32a1574c5_b.jpg

Kerst

[kerst]

Most of the painting is done. It took a long time, partly due to lack of time, but also to the bad weather. I did all the spraying on a bench outside and although it was covered the wind and the rain had free play. I re-assembled the carrier and the upper, but I still need to do all the warning stripes.
Overall I am very happy with the colors. I found the RAL codes of the Sarens colors and managed to find a US company that made spray paints according to the RAL colors and they are correct.

http://farm4.staticflickr.com/3683/9051093591_9877720412_b.jpg
http://farm8.staticflickr.com/7385/9051094805_b32f65a6e7_b.jpg

After my vacation I will finish all the detailing.

Kerst

[apfubar]

Very nice!

[kerst]

Progress is slow; it is just too hot in my workshop and too many distractions, but I did make some progress. The outriggers are ready, the boom is ready and next is the are the windows for the cabs, then i will put it all together and see if it still works.
http://farm8.staticflickr.com/7397/9327669485_da58355204_b.jpg

Kerst

[thercfreak2012]

will you post more progress pics with the windows and the assembly and setting it up

[Espeefan]

Wow, what a beast of a model. It looks massive just sitting on the shelf, in transportation mode. What kind of flex did your dial indicator show? About .005"? If so, that's really not much.

[kerst]

Another step:

http://farm3.staticflickr.com/2890/9400746481_5726665049_b.jpg
http://farm8.staticflickr.com/7376/9400746165_09ee0505f1_b.jpg
http://farm8.staticflickr.com/7450/9403507930_35314cc664_b.jpg
http://farm4.staticflickr.com/3761/9400745277_57779ce338_b.jpg
http://farm4.staticflickr.com/3778/9400744817_97123a35cc_b.jpg
http://farm6.staticflickr.com/5441/9403506368_16cdb8a0ab_b.jpg

Kerst

[thercfreak2012]

if you dont mind a video would just make it better

[kerst]

I decided to use this trailer to transport the boom. It is the counterweight trailer for the Krupp 180GMT and is scale 1/20, but the difference is hardly noticeable. I used some timber to raise the supports for the boom.
http://farm6.staticflickr.com/5501/9504644270_1c41904cc6_b.jpg

Kerst

[thercfreak2012]

hey it looks nice on that trailer but you should make a boom transpoerter trailer

[kerst]

I started a little project for the LTM 1800. I anyway need a box for storing screws, pins, shackles, tools, etc. so I decided to do what the big boys do and use a 20' container. I am making it out of AL and although it looks like a simple project, it still needed some thinking and planning. But I thoroughly enjoy this little project.
http://farm4.staticflickr.com/3805/9635360799_9d1c9c1c78_b.jpg

Kerst

[Pippoe]

Beautiful and stunning at the same time!

*applause*!!!!

[peterbilt65]

amazing job !I work with cranes everyday putting them together and taking them apart!,excellent detail to parts, thanks for sharing. neil

[kerst]

This is how I made the side of the 20' container:
http://farm3.staticflickr.com/2875/9690383371_0e05474ae8_c.jpg
http://farm3.staticflickr.com/2868/9690369573_502b961499_b.jpg
http://farm6.staticflickr.com/5524/9693605068_e4f8bb51a8_b.jpg

Kerst

[kerst]

Done!
http://farm4.staticflickr.com/3706/9981740875_b68b7f73f1_b.jpg
http://farm6.staticflickr.com/5327/9981806116_af3de40a91_b.jpg

Kerst

[sparkycuda]

Your crane is a wonderful piece of work! Details, functionality, overall look are just great. Then, you threw in the container...duh, it's just another piece of a really cool puzzle. Thanks for sharing how you did the corrugated sides - using the arbor press was a creative bonus!

Ken

[Southgate]

Wow, Kerst. It's been a while since I've checked in, and I must say you have been busy. Those colors look great, as does all the progress on the model. A scale container to carry parts in; great idea! Dan

[kerst]

Ready to work:
http://farm4.staticflickr.com/3796/10036693894_9977ea6803_b.jpg

Kerst

[Mojave450rider]

AWESOME!

[kerst]

Dear friends,

Thank you very much voting for the Liebherr LTM 1800 as build of the month. This is a great honor and concludes about 7 years of building this model in a very nice way.
I intend to shoot some better videos and give some demonstrations, but in the meantime I am thinking hard what will be next. I have lots of ideas, but it is hard to make a decision. i will keep you all posted.

Thanks again for all your support!

Kerst

[kerst]

In the past month I made a whole lot of accessories for the Liebherr LTM 1800, but they also work for my other cranes.
I made two hook blocks, a single sheave one and a three sheave one.
Beside that I made lots of slings and a spreader bar.

http://farm4.staticflickr.com/3754/11293000444_9ffc194434_b.jpg
http://farm4.staticflickr.com/3667/11292927985_28114ebc2f_b.jpg
http://farm6.staticflickr.com/5515/11292997124_216f0d0232_b.jpg
http://farm3.staticflickr.com/2885/11292963016_e64c7fdc92_b.jpg
http://farm4.staticflickr.com/3764/11292921915_935cc6e6ab_b.jpg

Kerst

[mbaulfinger]

Kerst have followed your project the whole way. Absolutely fantastic work! Do you mind if I ask your profession? Also where would a new comer begin to learn to build models such as this? Can you give any guidance as to how you started or perhaps a good beginners project fron scratch? Thanks so much....cannot wait to see your next project. This one will be hard to top! Mark

[cosworth34677]

holy magic carp this think is cool

[Espeefan]

Your spreader bar turned out awesome, and so did the container. I like how you made a die to stamp out the sides of the container. Thanks for sharing the process!

[Finster]

Awesome job! Just curious have you tested how much weight she can lift?

[kerst]

Awesome job! Just curious have you tested how much weight she can lift?

Thanks for the compliment. I managed to find some time and played with the crane a bit. I extended my desk and created a test yard.
This afternoon i found an old car battery, which weighs about 42 lbs and it lifted it with ease. 42 lbs at 1/24 scale is the equivalent of about 580,000 lbs for the real one.
I will post some pictures tomorrow.

kerst

[kerst]

Thanks for the compliment. I managed to find some time and played with the crane a bit. I extended my desk and created a test yard.
This afternoon i found an old car battery, which weighs about 42 lbs and it lifted it with ease. 42 lbs at 1/24 scale is the equivalent of about 580,000 lbs for the real one.
I will post some pictures tomorrow.

kerst

Here is a short video: http://www.youtube.com/watch?v=fnkx3qnu8yc

Kerst

[speedy8305]

very well built machine great skill

[kerst]

This happens when the radius is too large:
http://youtu.be/0vB239Yc1WQ

Kerst

[Finster]

Wow 42lbs! I didn't think it would be able to handle that but it does it easily. Awesome job. So how long do you think it will take you to build mine? ;)

[crawler07]

Breath taking how awesome this is!!! you should be extremely proud of you accomplishment. I found myself clapping when I seen you had posted a new video LOL!

[kerst]

Finally I managed to paint the Derrick tray and counterweights.
Here are some pictures:
https://farm8.staticflickr.com/7565/16049071481_20fb6e5979_b.jpg
https://farm8.staticflickr.com/7540/16025248066_b0a2421597_b.jpg

Kerst

[Joe25]

Great looking machine Kerst

[Southgate 1]

Hey Kerst, again it's been a while for me. Not that I didn't want to. I couldn't log in, have exhausted every possible password, no joy. Had to change my user name slightly and re-register!

The crane is looking fantastic, the new components are great too. That thing's lifting capacity, it's a MONSTER! Those blocks and hooks still amaze me, just so beautiful. And the paint on the counterweights and lifts sure helps bring it all together.

I haven't tested the lifting capacity of mine. Chicken, I guess. I don't know what will give first, and can foresee horrible wreckage.

Great work! Dan

[Southgate]

I had to come back for another look. Good stuff! Where did you get your shackles, or did you make them? Dan

[kerst]

I had to come back for another look. Good stuff! Where did you get your shackles, or did you make them? Dan

Thanks!
I bought the shackles from amazon, ha, ha! They are Steel D Shaped Shackles, 5/32" (4mm) thick, 5/16" (9mm) inside diameter.

Kerst

[kerst]

I got inspired by this crane again and started to add the jib.
There is a fixed jib and a luffing jib available and they share many basic parts. So I started to make some of the parts that can be used for both. initially i will make the fixed jib and later the more complicated luffing jib.
https://live.staticflickr.com/65535/48175143567_6205711e9e_b.jpg
https://live.staticflickr.com/65535/48175067601_dd23a56e93_b.jpg
https://live.staticflickr.com/65535/48175067701_edd55ed4cb_b.jpg

Kerst

[kerst]

Thank you for the kind remarks!

I made some good progress these past weeks.
https://live.staticflickr.com/65535/48290438647_9ac9c59dc7_b.jpg
https://live.staticflickr.com/65535/48290332746_422b9dc165_b.jpg
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https://live.staticflickr.com/65535/48290438582_dc3f8fba9d_b.jpg

Next is a 7 meter insert.

Kerst

[frizzen]

I'm really digging the booms, and the jib boom connection in a pretty slick set up

[kerst]

I decided to make the luffing jib as well and I am almost done. Only the pendants need to be made.

https://live.staticflickr.com/65535/48804792527_fdc7db399e_b.jpg
https://live.staticflickr.com/65535/48804792592_aa6aff6aed_b.jpg

Kerst

[sparkycuda]

Awesome work, as usual! That's a lot of fitting and soldering and machining and patience and all the other stuff it takes to make a complicated system like a crane.
:eek::eek::bounce:

Ken

[kerst]

Finally I put it all together. Getting all the bits together took quite a bit of time and I had to make a few adjustments to the winch for the luffing jib.
yesterday was the day and it worked nicely. I am fairly pleased with the result and how easily the crane handled the luffer. It is testing time now and I am making a list of all the small adjustments that need to be made.
https://live.staticflickr.com/65535/48998813572_b6b2af9701_b.jpg
https://live.staticflickr.com/65535/48998064288_311c22b269_b.jpg
https://live.staticflickr.com/65535/48998064378_b862bdc0a4_b.jpg

I am looking forward to the Cabin Fever Expo in January 2020. Then I can show it at full height! Ceilings are in the way at home.

Kerst

[Bo Wallen]

Looking good as usual Mr. Crane Guru. And it's ready for Cabin Fever also! Let's put it to work and have fun, got some beams in mind.........can't wait to see it up and running.

[TRUCKMAKER]

Looking forward to seeing the photos of it at full height and with Bo’S beams!

[FabOne]

GREAT build! AWESOME workmanship!!

[frizzen]

Wow that looks great!!!

I can't wait to see a video of it luffing and moving something

[liddy102]

Nice work

[Bo Wallen]

Kerst, Just wondering how much weight you can lift safely, I'm making stuff to lift, don't wanna overcharge your lifting chart.:cop:

[kerst]

Up to 20 lbs!

[kerst]

I managed to get the paint job done during the Thanksgiving break and put it all together for testing. There is one back stop missing.
Here it is fitted with the fixed jib:
https://live.staticflickr.com/65535/49160008438_332d460054_b.jpg
https://live.staticflickr.com/65535/49160492606_8d5bfd8148_b.jpg
https://live.staticflickr.com/65535/49160492896_d1be09c070_b.jpg

And here the luffing jib:
https://live.staticflickr.com/65535/49160724377_1845b2f50a_b.jpg
https://live.staticflickr.com/65535/49160009618_e3f4d83de2_b.jpg
https://live.staticflickr.com/65535/49160724837_d9672c5fd8_b.jpg

Here it is lifting a test load of 14 lbs:
https://live.staticflickr.com/65535/49160009128_f849a5f46e_b.jpg
https://live.staticflickr.com/65535/49160724097_f080689fd0_b.jpg

And here with only 7 lbs:
https://live.staticflickr.com/65535/49160724642_feb9b0c38d_b.jpg

Kerst

[Bo Wallen]

Simply stunning! I've got some 4-8 and 12lbs. Ready to lift. You might need a spreader 4" by 20" :D

[9W Monighan]

Wow, Please don't max it out on one of those picks.

[frizzen]

Wow. Jaw droppingly awesome

Looks and performs amazing if you've got a 14lb load on the 1/24 crane!

[Bo Wallen]

Wow. Jaw droppingly awesome

Looks and performs amazing if you've got a 14lb load on the 1/24 crane!

That's amazing 218750 LB Top Class :)

[bigford]

I remember when your first posted this back in 2010
Now one year to go for the 10 year challenge!!

[liddy102]

Great job

[kerst]

At the cabin Fever Expo in Lebanon, PA I had the chance to use the Demag TC500 to erect the luffing jib of the Liebherr LTM1800.

https://live.staticflickr.com/65535/49416591183_e6da332a40_b.jpg

https://live.staticflickr.com/65535/49417280952_4af9c0f1a1_b.jpg

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https://live.staticflickr.com/65535/49417281062_0c768de12e_b.jpg

https://live.staticflickr.com/65535/49417068301_4a9f53e818_b.jpg

https://live.staticflickr.com/65535/49417067206_4da61a7eec_b.jpg

Kerst

[kerst]

The one thing missing was the extra drum mounted on the boom when using both the derrick and the luffing jib. I managed to put the gearmotor (60rpm) inside the drum. It fitted beautifully! Today was testing day.
https://live.staticflickr.com/65535/49517985428_5cc5fa0469_b.jpg

https://live.staticflickr.com/65535/49517776248_0c9b3164c2_b.jpg

https://live.staticflickr.com/65535/49518681962_bc50fa3256_b.jpg

https://live.staticflickr.com/65535/49517776208_6d5bc33b7e_b.jpg

https://live.staticflickr.com/65535/49517776228_1b0a27a4e6_b.jpg

It still needs some paint.

Kerst

[skeeter]

I love it!