(MOC) Liebherr LTM 1050

[Milan]

LIEBHERR LTM 1050 WIP

I have always been a great fan of Mobile Cranes, particularly from Liebherr.

There are quite a few Crane models which I have built so far, but every one of them had some major flaws, or just not enough functions.

This is LTM 1050, relatively new mobile crane from Liebherr.

The LTM 1050-3.1 has been designed as an economical taxi crane. The biparted swing-away jib and a large portion of the ballast are included in its 12 t axle load. The innovative crane cab provides an ergonomic working area with an optimised heating and air-conditioning system. The active rear-axle steering and pneumatic disc brakes increase safety and efficiency in travel mode.

My goal is to create The Ultimate Mobile Crane, Technic inside, and Model Team outside, which could stand next to Jennifer Clark's great Demag AC-50: http://www.jenniferclarkbass.com/lego/images/ac50_1/ac50_1_threequarters_lrg.jpg

Her model has all functions as mine, but her has only front wheel steering, and only backs wheels drive, and limited suspension.

I don't want to use any non-LEGO parts, and I want to make ultimate axles, chassis and drivetrain, thin LEGO built luffing cylinder, and more...which will include:

6x6x6

All wheel drive

All wheel steer - 4 steer Modes

All wheel suspension

RC Drive

RC steer

RC Outrigger Deploy

RC Outrigger Up-Down

RC rotate Superstructure

RC Boom Luff

RC Boom Telescope

RC Hoist

4 steer modes:

-normal - all axles steer to achieve minimum turning radii

-crab - all axles steer the same

-no swerve on back - only front axle steer

-no swerve on front- only back axles steer

Modes remotely controlled,

I will use large 24x43 tires, they are perfect size for this model (regarding both proportions and aesthetics)

Modeled after PDF from Liebherr site, exact Lego replica in 1/16 - width 20 studs

And yes...it will have Pneumatic outriggers, remotely controlled.

WIP

OK, progress so far includes:

chassis, outrigger boxes, axles, truck cabin and crane cabin and boom:

I will post new progress as I build, and explained properly each segment of the build. Next is installing two XLs for driving, and its gears...

Comments are welcomed.

[Alasdair Ryan]

hold it there milan

they also have a extra counterweight system the counter weight behind the front cab connects to the underneath of the rear ballast also they have a tilt cab and diff locks you need to include these in your model as well otherwise Jenifer's got a better crane, might it be better to scrap the pneumatics for the jacks and use 4 small actuator's you can then use four small micro motors transfer them into pf function by using short extension wires, then run axles to the end and use a worm gear system

make sure you try and get as many boom extensions as you can other wise well you know......she will have a better crane

ps remember the rotating becons and reversing beeper

Edited August 23, 2010 by Alasdair Ryan

[Zerobricks]

So you took apart that unfinished crane and started a new one? Well it sure inherated the great looks! Cant wait for updates!

[backbone]

Couple of weeks ago, friend from lugpol built liebherr 1050:

http://www.brickshelf.com/cgi-bin/gallery.cgi?f=438378

[Milan]

hold it there milan

they also have a extra counterweight system the counter weight behind the front cab connects to the underneath of the rear ballast also they have a tilt cab and diff locks you need to include these in your model as well otherwise Jenifer's got a better crane, might it be better to scrap the pneumatics for the jacks and use 4 small actuator's you can then use four small micro motors transfer them into pf function by using short extension wires, then run axles to the end and use a worm gear system

make sure you try and get as many boom extensions as you can other wise well you know......she will have a better crane

ps remember the rotating becons and reversing beeper

Thanks for your reply,

Yes I am aware of all the things you have mentioned, I will try to incorporate as much as the scale allow. After all this is only a 20 studs wide carrier.

I am not aiming for a better crane than hers, just the best crane of all that I have build. I would like that final model would be as bear as good as her is!

So you took apart that unfinished crane and started a new one? Well it sure inherated the great looks! Cant wait for updates!

Thanks for your reply

No, this is 100 percent new crane, with new curved cab and new axles...everything is new, built from scratch!

Thanks!

Couple of weeks ago, friend from lugpol built liebherr 1050:

http://www.brickshelf.com/cgi-bin/gallery.cgi?f=438378

Thanks for the reply,

Yes, I saw it, it is a nice crane that has AWD, too.

Mine is a little bit bigger with 24x43 tires (20 studs wide)

To build 3 axle Liebherr crane is my dream, and this was my first after dark age in 2003 (don't laugh):

http://www.brickshelf.com/gallery/milanma/Liebherr/nearly_finished_2.jpg

[allanp]

might it be better to scrap the pneumatics

NNNNNEEEEEEEVVVVVVVEEEEEEEERRRRRRRRR!!!!!!!!!!!

[Milan]

NNNNNEEEEEEEVVVVVVVEEEEEEEERRRRRRRRR!!!!!!!!!!!

I know many of you guys just love pneumatics so I will keep them!

Mechanical LEGO brick built cylinder for luffing is still inevitable, sorry...I would love to have 16 studs long Pneumatic cylinder, too.

[efferman]

chassis, outrigger boxes, axles, truck cabin and crane cabin and boom:

you dont want using expandable outriggers in this big scale?

Edited August 23, 2010 by efferman

[Milan]

you dont want using expandable outriggers in this big scale?

I would LOVE to have realistic RC extend-able outriggers, something like this:

http://www.brickshelf.com/gallery/Zoli/6x6Ginaf/gcv024.jpg

But I am very fanatic here about proportions from the PDF file, which I am using as a reference, and the fact that I have only one slot available on IR Receiver, otherwise I would have to mount another Receiver...

I will think about it tonight and try to build concept to see how much it will break the proportions (Truck Cab would have to go much more forward)

[efferman]

how wide could the outriggers be? 3, 4, 5 studs?

your one channel problem is easy to solve. first extend the outrigger, then expands the stabilize cylinder automatic.

15 years ago this was a normal use to save functions at the hydraulic steering block.

Edited August 23, 2010 by efferman

[Milan]

how wide could the outriggers be? 3, 4, 5 studs?

your one channel problem is easy to solve. first extend the outrigger, then expands the stabilize cylinder automatic.

15 years ago this was a normal use to save functions at the hydraulic steering block.

Ok I have answered on your crane topic, it should be 5 studs max in perfect case, including vertical bracing of the outriggers side-walls.

Can you explain a little bit more on how to use one channel to:

1. extend the outriggers first, then extend the pneumatics second, when preparing the crane to operate, and

2. to retract the pneumatic first and then to retract the outriggers second, when preparing the crane to leave the site.

[efferman]

i think this vid will it explain. sorry for low res. the battery of the hd cam is empty

the pneumatic valve is in the position to pull the cylinder in. it must go heavier than the outrigger. then the outrigger will extend to its maximum. the diff is now switching the pneumatic valve to extend the cylinder .

to go in driving position the valve must going easier to switch as the retracting of the outrigger(rubberband?). when the valve is switched, the outrigger will be retracted.

questions?

Do you want pics?

Edited August 23, 2010 by efferman

[shimon]

It looks very promising i have to say!

I am also building a Liebherr LTM 1100 but an easy version; 8421 alike but with a decent look and TLG style build

and with PF compatibility.

Good luck!

i think this vid will it explain. sorry for low res. the battery of the hd cam is empty

the pneumatic valve is in the position to pull the cylinder in. it must go heavier than the outrigger. then the outrigger will extend to its maximum. the diff is now switching the pneumatic valve to extend the cylinder .

to go in driving position the valve must going easier to switch as the retracting of the outrigger(rubberband?). when the valve is switched, the outrigger will be retracted.

questions?

Do you want pics?

I can swear i thought of the same idea couple days ago but mine wasn't pneumatics it was 8258 kind

and the differential idea wont work because once the outrigger is lifted a little the diff can reverse to other function, unlike pneumatics. it could be nice doing two functions with one motor

[efferman]

I can swear i thought of the same idea couple days ago but mine wasn't pneumatics it was 8258 kind

and the differential idea wont work because once the outrigger is lifted a little the diff can reverse to other function, unlike pneumatics. it could be nice doing two functions with one motor

if the pneumatic cylinder is in Air, then it is only a beauty problem.

[shimon]

if the pneumatic cylinder is in Air, then it is only a beauty problem.

In pneumatics - yes , you have to rely on the friction that the cylinder causes lifting the crane

but what if both functions need rotation ( as in 8258) and operated from the differential?

Edited August 23, 2010 by shimon

[Milan]

I will have to experiment with that concept, efferman!

I will present my concept tomorrow. I am so into extendable outriggers right now

As far as I see now, I will have to order another M and Receiver just for outriggers

Ahhh, it is so good to be on a vacation, I can use full day just for my hobby!

[dhc6twinotter]

Awesome! I love all these crane builds! Makes me want to do one now.

Millan, any idea on how you are going to build the steering mechanism with the 4 modes?

[efferman]

...but what if both functions need rotation ( as in 8258) and operated from the differential?

sorry, i dont know what you mean

[shimon]

sorry, i dont know what you mean

I'm sorry my English isn't so good,

what i meant is that if you replace the pneumatic with a worm gear outrigger and make it extend + deploy with the Differential idea as you shown, it wont really work..

[Milan]

Awesome! I love all these crane builds! Makes me want to do one now.

Millan, any idea on how you are going to build the steering mechanism with the 4 modes?

Thanks for your reply,

For the Steering: 4 Modes are already working! I like the crab steering the most!

It is surprisingly easy solution, I will shown it once I finish with the outriggers.

I have some good progress with the outriggers, unfortunately I will have to use another receiver and another 2Ms,

Will shown them in a few hours.

[Alasdair Ryan]

what about my idea yes you would need to get 4 micro motors but is is quite simple to build you could this idea to make telescoping legs as well simply by having the micro motor at the end of the 2 extension then run a extension wire inside simples

[Milan]

what about my idea yes you would need to get 4 micro motors but is is quite simple to build you could this idea to make telescoping legs as well simply by having the micro motor at the end of the 2 extension then run a extension wire inside simples

One Micro motor is about 14 Euros...

Pneumatics are more realistic and have some retro appearance.

To tell the truth, I was thinking about that idea for a quite some time, but at the end I think that pneumatics fits better.

Thanks for your interest, Ryan!

Especially with your first post with interesting ideas. I am also very much into details about mobile cranes, analyzing PDF files etc.

[Milan]

I made the extendable outriggers with pneumatics, all RC!

The whole box is 5 studs wide, each outrigger can extend 12 studs, so total width of the vehicle in working mode is 44 studs.

It could be more, but it would be much more pressure on the chassis.

Each outrigger set has its own M motor, and all pneumatics are fed by one autovalve compressor.

Pictures:

(note that yellow outriggers will have yellow-black danger diagonal stripes)

Chassis can hold pretty much weight, if it starts bending I will add another layer of beams on top of the chassis.

[efferman]

I'm sorry my English isn't so good,

what i meant is that if you replace the pneumatic with a worm gear outrigger and make it extend + deploy with the Differential idea as you shown, it wont really work..

maybe, maybe not. anyone must try it, to be sure.

@ milan

looks much better than before. have you a bigger picture of your extra thin outrigger boxes?

Edited August 24, 2010 by efferman

[Milan]

Ok after 3 two days of tweaking and tuninng I come up with my best outriggers so far.

Dimensions are the same, and configured to fit the scale of the crane (20 studs wide)

Wide 20studs

Height 5 studs (without cylinders) 10 studs (with cylinders)

Length 5 studs

Extended 44 studs

Just to say hey are very rigid and they can hold the whole crane in air now (crane not finished), with some wight added to simulate completed model.

Connection to the chassis is done via vertical beams and 6 pins, will show that later.

Hoses goes underneath the boxes, I have the idea how to fit them.

As told before, all RC here.

I will review them in full when the crane is finished for now few pictures: