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Demag TC 500 truck crane in scale 1/24 Options · View
Victor Pay
Posted: Saturday, July 25, 2015 5:14:24 AM

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kerst wrote:

Their tires are great. They just a little bit on the big size for this scale, so it all gets tight,


I was wondering if they don't touch when steering. Model wheels always take up more space then the original, since the pivot point is more away from the center of the wheel.
That, and then they are also bigger...
kerst
Posted: Saturday, July 25, 2015 7:26:12 AM

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Victor Pay wrote:
kerst wrote:

Their tires are great. They just a little bit on the big size for this scale, so it all gets tight,


I was wondering if they don't touch when steering. Model wheels always take up more space then the original, since the pivot point is more away from the center of the wheel.
That, and then they are also bigger...


That was certainly a challenge, but i got them to stay clear of each other while steering.

Kerst


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EliMax
Posted: Sunday, July 26, 2015 8:36:16 AM

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Excellence in model making. Thanks for sharing.




https://www.facebook.com/pages/Elis-Hobby-Diecast/803248369690387?ref=hl
Ironstef70
Posted: Sunday, July 26, 2015 1:18:48 PM

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This is exactly the type of project I wish I'd do once retired Wink For now, I am playing with small tools due to limited space.

Kerst, one question: did you had the blueprints for the making of your parts or did you figured it out approximatively?

Wonderful project my friend. Wishing you good luck for the final steps, but I am confident it will be one of a kind as far as piece of artwork and engineering.
My wife would say I've got saliva dripping out my mouth... Whatever

Stephane

___________________________________________________
Playing with toys since 1970, now building them.
kerst
Posted: Sunday, July 26, 2015 2:20:40 PM

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Ironstef70 wrote:
This is exactly the type of project I wish I'd do once retired Wink For now, I am playing with small tools due to limited space.

Kerst, one question: did you had the blueprints for the making of your parts or did you figured it out approximatively?

Wonderful project my friend. Wishing you good luck for the final steps, but I am confident it will be one of a kind as far as piece of artwork and engineering.
My wife would say I've got saliva dripping out my mouth... Whatever

Stephane


Thanks for the nice words!
I don't have the blueprints, just documentation and lots of pictures found on the Internet, so I have to do a lot of figuring out, which is fun.

Kerst


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kerst
Posted: Wednesday, July 29, 2015 10:13:47 AM

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Faun carrier

The outrigger boxes are ready and bolted to the carrier. Next will be the outrigger beams. I am also thinking how to build the gearbox and transfer case and which motor to use. There is not a lot of space, so they need to be designed carefully.






Note: The third axle is missing.


Kerst


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kerst
Posted: Monday, August 24, 2015 9:57:24 AM

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Transfer box

In the last couple of weeks I have been experimenting with a planetary reduction, which I got from a small geared motor. A lot of trial and error! The outside diameter is 22 mm and all the gears are steel.
The trick was to incorporate it in the transfer box. I tried a lot of different setups, but I think I found a setup that works. The transfer box will have two speeds (direct and very low) and front wheel drive can be engaged or disengaged. The real one has an inter-axle diff, between the rear axles and the front axle, but I couldn’t find the right planetaries to accomplish that. It would need a 1:2 ratio.
It turned out nice and compact. But it hasn’t been tested yet.


Kerst



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kerst
Posted: Thursday, September 10, 2015 9:29:22 AM

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During the past couple of weeks I worked on the universal joints. I always make them myself, mainly because they need to be very specific in size, but also because good quality universal joints are very expensive. The final assembly of the joints is always tricky, because I solder the pins (1/16" diameter) in from the center and the solder easily flows in the wrong spaces. It needs to be heated just enough for the solder to flow, but not too long. I had a cup of water handy to cool it down quick once I thought it was done.

In the pictures the motor is directly connected to the transfer box, but I might add a 2-speed gearbox. I want to first try out the speeds and see if this is the right motor, etc.




Kerst


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Pricer
Posted: Thursday, September 10, 2015 3:08:20 PM

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Location: Mobile Alabama
kerst wrote:
During the past couple of weeks I worked on the universal joints. I always make them myself, mainly because they need to be very specific in size, but also because good quality universal joints are very expensive. The final assembly of the joints is always tricky, because I solder the pins (1/16" diameter) in from the center and the solder easily flows in the wrong spaces. It needs to be heated just enough for the solder to flow, but not too long. I had a cup of water handy to cool it down quick once I thought it was done.

In the pictures the motor is directly connected to the transfer box, but I might add a 2-speed gearbox. I want to first try out the speeds and see if this is the right motor, etc.




Kerst


Looking good! Kerst, Can you tell me where you get your gears? Are you making all of your own gears? Job well done!
kerst
Posted: Thursday, September 10, 2015 4:31:07 PM

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kerst
Posted: Tuesday, September 15, 2015 11:57:11 AM

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Mark Bridle
Posted: Tuesday, September 15, 2015 3:14:43 PM

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Nice looking work, what motor are you using?
Mark Bridle
kerst
Posted: Sunday, October 25, 2015 7:30:20 PM

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I did some work on the cab. I added the doors with homemade hinges. They still look clunky, but this was the best I could do.



I also installed the motor and a separate small gear motor to lift the counterweights. This needed a bit of thinking, since room was very limited. The 2 pictures show it both in lowered as in in raised position.



Kerst


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AZ2RAIL
Posted: Sunday, October 25, 2015 10:10:28 PM

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Nice project. It should look good when you are finnished. I think that it is great that you have the tools and the knowledge to do this.
kerst
Posted: Thursday, December 31, 2015 2:45:52 PM

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In the past couple of months I did all kinds of little things, including optimizing the steering, working on the space in front of the third axle, the levers of the gearbox and some other details.





Here is a short video of the steering in action: https://youtu.be/ObYaSMiSlfU

I also made a box for the crane with space for the crane itself and the boom sections.




I wish you all a Happy New year and see you at the Cabin Fever Expo!
Kerst



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kerst
Posted: Sunday, February 07, 2016 5:12:09 PM

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I started work on the outriggers. here you can see the structural parts of the outriggers, steel, brazed together. I will use hand operated screw jacks for the vertical movement. there is too little space for a motor.


kerst


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JoeE
Posted: Sunday, February 07, 2016 6:13:22 PM

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I missed this thread somehow before.
Awesome work.
What a great subject as well.



We rally round the family, with a pocket full of shells.....
Ironstef70
Posted: Sunday, February 07, 2016 9:05:04 PM

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Kerst, that's just fantastic work. About the door hinges: they don't look so clunky in my opinion.

Personally, I favor functionality to just detail. How about just grinding the front ends and a little polishing then it won't be noticeable. I think it's just about the sharpness of the edges.

Stephane

___________________________________________________
Playing with toys since 1970, now building them.
kerst
Posted: Sunday, February 07, 2016 9:43:43 PM

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Ironstef70 wrote:
Kerst, that's just fantastic work. About the door hinges: they don't look so clunky in my opinion.

Personally, I favor functionality to just detail. How about just grinding the front ends and a little polishing then it won't be noticeable. I think it's just about the sharpness of the edges.

Stephane


Thanks! Good idea!

kerst


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kerst
Posted: Wednesday, March 02, 2016 8:24:40 PM

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I finished the outrigger boxes. The vertical movement is hand operated with a screw inside, very simple.


Kerst


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