RC Liebherr LTM 1090 mobile crane (62 mm wheels)

[Tamas Juhasz]

Hello!

I'm finished with uploading and lot of work, you can see one of my biggest and most complex moc. I always loved mobile cranes, so I decided to make a Liebherr LTM 1090 with medium sized (62,4 mm) wheels:

folder with bigger pictures: http://www.brickshel...ry.cgi?f=533546

big montage: http://www.brickshel...90-62mm/002.jpg

boom: http://www.brickshel...ry.cgi?f=533548

details: http://www.brickshel...ry.cgi?f=533547

About the mobile crane:

Every function is remote controlled:

- driving (1 XL motor)

- steering (1 M motor)

- outriggers outcoming and legs moving (1 pneumatic circuit with rubber band "control", 1 M motor for pneu switch)

- upper structure rotating

- boom raising

- boom extension

- winch (hook)

- compressor for making pressure

- front lights (together with driving (and steering with "turn signals") )

After outriggers, these functions are working also with one M motor, or directly from the receiver's output.

Dimensions:

Length: 610 mm

Width: 135 mm

Height: 211 mm

Scale: 1:20,5

Dimensions with raised and extended boom:

Length: 1235 mm

Height: 1260 mm

Other dates:

Number of pieces: 3433

Weight: 3460 g

Building time: 23 days

Speed:

first gear: 0,14 km/h

second gear: 0,23 km/h

third gear: 0,38 km/h

fourth gear: 0,55 km/h

Maximum boom extension:

DETAILS:

Flashing light in the back (made with two light brick, but one is covered with that black piece):

Lights:

Exhaust:

Instrument panel:

Manometer (for seeing the outrigger's pressure) and gearbox (manual) cover (the dkbluishgray one):

You can use the airtnak in the pneumatic system, or not, depends on these two pneu valves:

http://www.brickshel...90-62mm/024.jpg

Truck

The truck part is an 8x8x8 driven construction ( http://www.brickshel...y.cgi?i=5936235 ), with a manual gearbox and One Xl motor for drive. The outriggers are working with pneumatic, as can be seen in the pictures, one motor with pneu valve is enough for control, because the backward movement is done with rubber bands. The pneumatic system is enough strong to pull out the rubber bands and lift the mobile crane's own weight.

http://www.brickshel...y.cgi?i=5936260 - I simply wanted to try out this solution (the original also has also a clyinder to push out the legs). It doesn't works 100%, sometimes a little help is needed to came back.

The motorized pneu valve isn't my idea, I saearched a lot to find the designer, but it wasn't success. A compressor makes pressure in the aritank (or directly to the legs, see the description above), then the valves can be opened or closed.

The PF system has 8 channels overall, so some functions are together with other ones, like the front lights with steering. One PF led is for light.

Crane part (upper structure)

The most important in this part is the strenghtening in the turntable, I made it with 4 pulleys, and 2 mm width rubber bands (O rings):

http://www.brickshel...y.cgi?i=5936256

Works, well, in extended state the boom doesn't deforms the structure.

The 4 pneumatic cylinder can raise the quite heavy (3 section) boom, but not in extended state (as most of the originals). The whole boom can be extended up to 1260 mm height. The backward movement is done with strings, not with gravity, it's more reliable.

One small Li-Po battery can power the machine, this black button is for power on/off: http://www.brickshel...y.cgi?i=5936219

http://www.brickshel...90-62mm/004.jpg - you can switch after the operator's cabin with the dkblgray pneu switch to raise the cabin in angle or not (done with one little pneu cylinder).

This video can tell more than me, it took me a time to make it, but it's necessary for this model:

Hope you like it.

Maybe I didn't write everything, feel free to ask, if something isn't clear.

Edited September 4, 2013 by Mbmc

[750ACE]

You did a wonderful job with great detail and functions. The write up is very well done also. Instructions maybe?

[youngwing]

Perfect design, cong.. I like realistic technic models like that. Minimum studs and looks real...

[Doc_Brown]

What a breathtaking model! Outstanding job. :thumbup:

That boom lifts so fast!

Amazing details and functions. Well done indeed.

[skriblez]

Damn, that is some nice Moc work! Very well done.

[jorgeopesi]

Great work, congratulations for this crane .

[CisFran]

Nicely done!

amazing details, I like the way you did the outriggers

[Dreadredbeard]

Wow... that is amazingly well done!

[legomuppet9]

Brilliant model, I like the functionality and the blend between the studfull and studless exterior

[Alasdair Ryan]

Great crane,I saw this crane already ether on brickshelf or youtube.

[Blakbird]

Absolutely beautiful machine. Looks totally Model Team, but underneath it is all Technic.

[zux]

Absolutely beautiful machine. Looks totally Model Team, but underneath it is all Technic.

Same thoughts. Higly detailed MOC, I like it.

[Sardo]

Best crane ever !

[Jeroen Ottens]

Amazing creation, such clean lines!

You managed to cram a lot of functionality in that model!

[PsyKater]

Absolutely beautiful machine. Looks totally Model Team, but underneath it is all Technic.

This was my thought as well. It looks really really good and then it has all the function an then it is even RC! Great!

[Lakop]

Quality.

H

[Kronos]

Great crane,I saw this crane already ether on brickshelf or youtube.

Same here! I've been waiting for a thread here about it.

[grum64]

Magnifificent! Simply Magnificent!

[rm8]

Best crane I have ever see!

[Nike 2101]

It is better than 42009!

[Rishab N]

Beautiful crane! i saw it earlier on BS

[timslegos]

I saw this earlier and was amazed! Nice work?

tim

[Technyk32231]

Nice model. How do you know exactly how many parts are in it?

[jantjeuh]

Very impressive!

[VKTechnic]

Very clean looking model! Great job!