Trailer - Tamiya 3 axle setup question

[Espeefan]

I'm pretty sure the majority of guys running 3 axle trailers are most often running a tandem, stock walking beam spring set-up on two axles, and then an individual leaf spring set-up for the third. Others may not run any springs at all, the third axle is a lift axle. They use a servo to raise and lower it, sometimes with, and sometimes without a single leaf spring.

Alternatively, you could run a simulated air bag set-up, available from PMD. Then every axle would be sprung individually, with no walking beams and no leaf springs.

Another good idea (my personal choice) would be to run two walking beam spring packs, across the three axles, with the center axle being sprung equally by the two walking beam spring packs. The outer axles, simply having one end each, of the spring pack. Performance-wise, that would probably give you the best suspension. I have no photos, but it's not to complex. Perhaps others will chime in with some of their set-ups.

This happens to be a perfect example of a three axle, walking beam suspension, I just found. Look at Kyle's pictures and you'll find exactly what you need.

http://rctruckandconstruction.com/sh...96&postcount=4

[roadranger]

Here's how one guy did it;
custom made shackles to tie the springs together.



And here's how I did it;
Uses all stock Tamiya suspension parts combining 2 rear suspension assemblies

Look closely at the center axle;
that's a radius arm bracket on top - one spring eye bolts into it, the other spring eye slips along an aluminum piece glued inside the bracket on top of the bolt heads. You can't bolt both spring eyes into the bracket, then there is no articulation.



Here they are set up on my B-trains;

[aseejr]

Thanks for the replies.

I've started the build of my tanker B-Train (front trailer). I picked up a Tamiya pole trailer to get the extra suspension pieces, not knowing that the plastic pieces in the pole trailer is not black. Going to exchange it for a flat deck trailer and continue with the build this weekend. I'll post pictures when I get further along with the project.