RC Tank Warfare community hobby forum

A Saracen would be another one to add to the list

Wow, I've always loved these armoured cars

I'll definitely enjoy watching this build Alwyn

And Mr mcevoyi is dead right, the forces are directly opposite and therefore balanced as best they can be, far less strain on the servo

Thanks guys, yes once I've mastered the chassis, many things become possible. Here's the stalwart illustrating the differential steering between the first and second set of wheels


Alwyn

Will this help Alwyn.



As you only have three axles, obviously the 90 degree base line would come from the centre of your fixed rear wheel

Yes that helps a lot - Thanks

Alwyn

Cool and good

Obviously that's only an example I found to illustrate, the dimensions and angles will be different, but the formula is the same.

Made some progress



I'm definitely going to need metal parts on this. I redesigned the leaf spring because the main leaf on the thingiverse version wasn't strong enough for what I need. I've also redesigned the spring hangers - more on that later.

Alwyn

Son of a gun-ner wrote:Will this help Alwyn.



As you only have three axles, obviously the 90 degree base line would come from the centre of your fixed rear wheel

beat me to it

But for me i would use seperate servo on each axle. Use different length servo arms on each and 3d print a new hub with longer arm on it for one of the axles or maybe both and play with the steering linkage to pivot point.
I did this on my rat rod designs and also had to do it on my crawler.

As for full steering turn, you could also cheat and put servo limiter in place to avoid max movement on one of the axles.

I metioned the brackets for the suspension, here they are



Alwyn

I suddenly realised the answer to the drive problem isn't a transfer box, its two motors as in Wills build. It completely avoids the tight space problem, plus the motors are very compact. Its also a much cheaper solution. Eureka!

Alwyn