Liebherr LTM 1030-2

[Roadmasters]

Where are the pics???

[texken]

Here are the photos I hope.
texken

[scalecranes]

Looks like you're off to a good start Ken. Where did you end up getting wheels from?

[texken]

wheels from du-bro. Big Wheels, smooth inflatable with positive seal air valves , plus rim has 5 bolts look.
Hope they work.
hard to find race car tires that are 4".

[texken]

Getting wheels from Du-Bro.
Smooth

big wheels with air valve.
Rims has 5 bolt looks.

How is you Crane going?

Texken

[texken]

More done today
still need to trim back deck.
need to get the screw cylinders for jacks.

[scalecranes]

Looking good. Have you thought about what you're going to use for a winch motor yet?

[texken]

No on winch.
Was looking at the winches they use on 4x4 jeeps.
Or just make one up.

Texken

[Southgate]

The "keel" is looking good so far, Ken. Lots of heavy metal coming up, huh? Dan

[Southgate]

Ken, (and others following) I googled the crane numbers to see what we're looking at. Here's a link:

http://www.liebherr.com/AT/en-GB/pro...measure-metric

Dan

[Jared]

Originally Posted by texken

No on winch.
Was looking at the winches they use on 4x4 jeeps.
Or just make one up.

Texken

I would think about using servos modified for continuous rotation. All you have to do is plug them into your receiver and they will operate just like a hydraulic winch. Modifying them is easy, but I'm not sure if you can modify all of them. Metal gears are good and double ball bearings are a must. I think Smallhaul or Stuff knows where to get servos already set up for continuous rotation.

To chose a servo, just figure out how much weight in ounces you want the winch to pull, then multiply that by the radius of the core of your winch drum and that will give you the inch/ounces of torque required and then chose a servo that has at least double the torque (a little is good, a lot is better) so you don't burn it up. If you want to lift 320 ounces (20 lbs) with a four-part line, then you need a line pull of 80 ounces. So, if your drum core is .75" diameter, the radius is .375"; then 80 X .375 = 30 in/oz required so you need a servo capable of at least 60 in/oz.

And to make sure it has the right speed, take the time/60 degree rotation spec and multiply by six and then divide 60 by that number to get rpms. If a servo has a .18 second for 60 degree rotation, then .18 X 6 = 1.08 seconds per revolution. 60 divided by 1.08 = 55.55 rpms. Since the drum core has a diameter of 3/4 inch, the circumference is 2.35". 55.55 rpms X 2.35" circumference = 130 inches/minute of line speed.

You probably already know how to do the math, but if anyone else wants to know, that's how I do it.

[texken]

Thank you for the info Jared.

finished the head rig

Paint will be nice LOL

TEXKEN

[texken]

Still need to clean it up.
ken

[texken]

up dates
Working on Chassis driver cab.
Working on doors.
Some one said to you Plastic weld, then Exposy to hole nylon hinges.
Well seem to be holding

TEXKEN

[mog]

well i figger out my boom for my crane and it truns out you can get steel tube from any local steel place. if you get .100 squar tubing it works great. but that might be too heavy for your crane. 1 1/2 goes in to 1-1/4-1-3/. 3/4 come's in .065 wall so your will have to shim the 1/2 if if you need that size. good luck

[texken]

Hi Mog, found the SQ tube, in All.
Also now know how to extend boon together like the real ones.
Made a wood model, used the Liebherr way on their home page.

TEXKEN ken

[texken]

OK found tires/wheels, found boom, working on boon mechanizes for raising boom.

Still meed to get two more tires/wheels (on order) for back, and motors to drive them.

I now know how to make the boom sections work, made it Out of wood to make sure. Will work like the real one.

Should have photos soon.

Now need to find a sound system, so when lifting something I get the sound, any input??
Just crane sound running, then speed up when raising boom, or lifting.

Later,
TEXKEN

[texken]

Getting their, little by little
Receiver my last three tires today.
Also have outriggers getting their.
Have boom lifting cylinder almost, still need a good motor, any USA store and what size to get?

OK, found the 4" tires, love the pet store LOL LOL

Texken Ken

[kerst]

Looks nice!
Check eBay for motors, there is usually a good choice.

Kerst

[doodlebug]

Hey texken, you can try www.surpluscenter.com have them send a catalog, see if any of the 12dc stuff will work. http://www.surpluscenter.com/sort.as...&PAGELEN=10000 Not the entire collection, but give's you idea's. Later, Neil#2 aka doodlebug.

P.S. http://www.surpluscenter.com/sort.as...c&keyword=MCDD