Re: Liebherr LTM1800 scale 1/24
 

Very nice video!!

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

Cheers

Pip

Re: Liebherr LTM1800 scale 1/24
 

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.

Re: Liebherr LTM1800 scale 1/24
 

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

Re: Liebherr LTM1800 scale 1/24
 

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/img195/5...ront913201.jpg
http://img196.imageshack.us/img196/5...ear9132011.jpg

Kerst

Re: Liebherr LTM1800 scale 1/24
 

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 .

Re: Liebherr LTM1800 scale 1/24
 

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<

Re: Liebherr LTM1800 scale 1/24
 

Thanks,

kerst

Re: Liebherr LTM1800 scale 1/24
 

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

Re: Liebherr LTM1800 scale 1/24
 

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!

Re: Liebherr LTM1800 scale 1/24
 

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/img23/341...ope2102520.jpg
http://img844.imageshack.us/img844/3...ope1102520.jpg
kerst

Re: Liebherr LTM1800 scale 1/24
 

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.

Re: Liebherr LTM1800 scale 1/24
 

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_Componen...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

Re: Liebherr LTM1800 scale 1/24
 

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

Re: Liebherr LTM1800 scale 1/24
 

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/img577/5...1620118095.jpg


Kerst

Re: Liebherr LTM1800 scale 1/24
 

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.

Re: Liebherr LTM1800 scale 1/24
 

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

Re: Liebherr LTM1800 scale 1/24
 

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/img705/4...01144458pm.jpg
http://img854.imageshack.us/img854/4036/img0273pq.jpg

Kerst

Re: Liebherr LTM1800 scale 1/24
 

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

Re: Liebherr LTM1800 scale 1/24
 

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

Re: Liebherr LTM1800 scale 1/24
 

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!

Re: Liebherr LTM1800 scale 1/24
 

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/img52/474...0dec302011.jpg
Kerst

Re: Liebherr LTM1800 scale 1/24
 

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"

Re: Liebherr LTM1800 scale 1/24
 

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

Re: Liebherr LTM1800 scale 1/24
 

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.

Re: Liebherr LTM1800 scale 1/24
 

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/img813/9...01251522pm.jpg

Kerst

Re: Liebherr LTM1800 scale 1/24
 

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

Re: Liebherr LTM1800 scale 1/24
 

Still working on the counterweights:
http://farm7.staticflickr.com/6233/7...68a875e3_b.jpg

Kerst

Re: Liebherr LTM1800 scale 1/24
 

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

Re: Liebherr LTM1800 scale 1/24
 

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.

Re: Liebherr LTM1800 scale 1/24
 

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

Re: Liebherr LTM1800 scale 1/24
 

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/dickvan...th/4622268767/ shows the LTM1800 with Derrick mast.

This is the butt being out together:
http://farm8.staticflickr.com/7128/7...53b6af6f_b.jpg
These are the sides of the 14 m middle piece:
http://farm9.staticflickr.com/8431/7...d264f347_b.jpg
and this is the setup for milling the chords:
http://farm8.staticflickr.com/7278/7...529f06ce_b.jpg

Kerst

Re: Liebherr LTM1800 scale 1/24
 

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

Re: Liebherr LTM1800 scale 1/24
 

After a lot of straightening out it is coming together:
http://farm9.staticflickr.com/8440/7...15a7a5df_b.jpg

Kerst

Re: Liebherr LTM1800 scale 1/24
 

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.

Re: Liebherr LTM1800 scale 1/24
 

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

Re: Liebherr LTM1800 scale 1/24
 

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

Re: Liebherr LTM1800 scale 1/24
 

awesome brass work!! Those are some crazy skills

Re: Liebherr LTM1800 scale 1/24
 

very nice butt section I havent got that far yet

Re: Liebherr LTM1800 scale 1/24
 

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

Re: Liebherr LTM1800 scale 1/24
 

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