It seems that I can't edit my previous message... 

Here is the link: https://www.bricklink.com/v2/catalog/catalogitem.page?P=3703#T=C

aah, a technic Beam.

Backwards driving is hard as i thought

 

Height adjustable king pin for solid goosenecks.

 

On 4/21/2019 at 3:39 PM, efferman said:

Backwards driving is hard as i thought

Really interesting, I am looking forward  for more pictures and progress on this mechanisms, because I had similiar problems years ago and maybe thanks to you I will find a solution :)

 

Edited April 22, 20195 yr by M_longer

This is very long. How long it is exactly?

7 minutes ago, efferman said:

This is very long. How long it is exactly?

If I recall correctly, 140cm?

Ok, this will need self driving platforms to come around the corners. Maybe only in the back.

The gooseneck in a short test fitting

On ‎4‎/‎22‎/‎2019 at 1:39 AM, efferman said:

Backwards driving is hard as i thought

We cheat when it comes to backing up.( you put a puller truck on the rear trailer )   This is going to be one serious Model once finished and complete with trailers and load.

I am watching this with most interest..

A pusher is a good idea

The chassis is driving. Please note there is not enough load on the back to compress the springs on the drive axles. So the last axle is in the air

 

It is fast. Will it have enough torque to pull that trailer with additional load? I was going to use 2 XL motors with two speed transmission for similiar purpose.

It has the same reduction and same Motors like my tow truck and i guess it is enough.

 

edit²

Enough for today. The servo on top is for the fifth wheel.

Edited April 27, 20195 yr by efferman

a break for lunch and the Tower is done

Very nice how you managed to camouflage battery box 

IMHO looks like SLT truck version.

Kind regards my friend

enough for today

Seems i have to rebuild the Tower a bit. the PF Connectors are colliding with the cab.

 

edit:

Problem solved

Edited April 30, 20195 yr by efferman

Happy Lunchtime

 

edit:

 

 

 

 

 

Edited May 1, 20195 yr by efferman

Fantastic model thus far! I'm kinda wondering if those U-joints might break under the loads that you will be towing. Also, you're missing warning lights on the cab.

Even when a u joint might break the othe xl will dive its axle. One of the xl is directly mounted at the axle.

seems to work

 

Yes it works fine. 

Just one question (out of curiosity): how many trucks do you have assembled?

actually the tgs, the wrecker , the SLT, k100 and my U4000

And I suppose TGS, Wrecker and SLT are in scale 1:16.5, K100 is 1:20 and U400 (yellow?) Is1:12.5?