On my 5th birthday I got my first
Technic-LEGO, it was a red tractor
(nr. 851). Now, more then thirty years later I have over ten big LEGO models like the new submarine (8250), the big car (8880), the programmable models (8485), the barcode truck (8479), etc., etc.
I like designing models of real cars like ferrari's. I also like designing my own models with extreme functions, like large cranes. And of course I like trains!
My latest project is a Liebherr LTM 1800 mobile Crane (or a LG 1550, depends on the configuration) on miniland scale.
Goal is to make it functional and looking as exactly as possible like the real one. I use the Mammoet (Van Seumeren) colors, because I am a dutchman.
Both types of cranes have the same base which exits of an truck with 8 axles (6 of them are steering). On top of the truck is a very large cranehouse which holds the drums for the cables.
One of the problems I encountered was to drive the four drums with one motor on a very tiny space.
You will get a CD with:
- Step by step building instructions for Liebherr LR 1750 and LG 1550
- Instruction document (in English and Dutch) with pictures of how to put together all the crane pieces
- BrickStore lists of used items
- Time to time updates by e-mail
Nov 2003: First attempts: satisfied with the truck and its steering principle. I just don't know how to
make the drums work...
The telescopic boom is still under construction.
Dec 2003: Here there are few approvements and additions. The cranehouse has been improved a lot and will
stay in this form unless I encouter problems which force me to change it.
The counterweights are ready, they contain the original LEGO weights 6x2x2 and some LEGO to make the size and shape right. One of those contains a 9V motor for the drums.
I also started with the building of the lattice boom which is placed on top of the telescopic boom.
On the second picture you can see how the supports are working. Later on they will be made telescopic also.
The spare tyre on the back of the truck is used for steering!
Here it is in its assembled form, although not ready yet.
In the closeup you can see how little space there was for the technics which drive the drums.
Jan 2004:Here it is again in its assembled form, testing if the wires were holding.
The telescopic boom is in its definitive form. The supports have their telescopic form.
This is a different setup, with a so-called 'derrick', that is the lattice boom in the picture.
It is reaching 1 metre high now, in scale that is almost 50 metres!
The extra boom on top of it is the beginning of the extra luffing jib (lattice boom) which is assembled on top of the telescopic boom. Pictures of it will be here soon. Now I am working on the extra ballast option.
The first attempt to test the extra ballast option in combination with the luffing jib.
As you can see on the first picture it was quite succesfull!
There was only one problem; The top part of the telescopic boom was bending too much. Next time I will assemble the attach point of the Derrick cable to the top of the boom.
As always the cat is very interested in what I do with LEGO, he likes to take a nap in it...
March 2004: I came to the conclusion that I needed an extra cable drum....For
extracting the telescopic boom. But that one had to be driven very slowly, because of the force needed for extraction.
And also the cranehouse was not strong enough to hold all the ballast.
So I have redesigned the whole house. The shape has not changed very much, but the internal technics are totally different. Instead of 4 parallel axes there are 5 now and there are two motors in the ballast instead of one.
As you can see in the picture the front drum is decelerated an extra step for extra force. The single panel on each side of the house is there to create some vertical stiffness so the bricks won't come loose when putting the ballast in place.
Finally I have found the black wire I needed, at the local shoemakers! It is even thinner than the LEGO wire but very strong!
April 2004: I finished the extra ballast and I tested the complete setup.
The first problem I encountered was that the gears were slipping, escpecially the two rear drums. So
I had to modify the whole gearing..... again!!! The result you can see in the first picture. It does not
seem to be very different, but the axes setup beneath the drums is!
Then the second test... which resulted in a crash! The luffing jib (1.30 mtr = 65 scale mtr!) was swinging sidewards and the head of the telescopic beam broke in pieces. But strangly the luffing jib stayed in one piece, so a good construction!
The third test was succesfull as you can see in the pictures. The counterweight was heavy enough to lift the jib, it came just a few millimeters from the table. So all the weight was carried by the truck!
The next test will be on the floor, because on the table I was not able to lift the luffing jib very high. Next goal will be a main lattice boom.
May 2004: Main lattice boom ready (1.70 metres = 85 scale metres). Testing on the living room floor, so I would have enough
height beneath the ceiling. But I had not...
Big format picture of the entire setup.
There will be more soon...
You want to see more? Goto
* 4-wheel drive
* V-6 Engine
* Gear-box with 4 gears