trado/walking beam/boomerang

[nuyt]

Hello,

I was going to do a little thread on my Overvalwagen Forum about the supposed relation between the DAF Trado 6x6 conversion kits and Engesa of Brazil's Boomerang system, but then I discovered I know to little about the technical features of this.

I need a lesson.

Bart Vanderveen mentions the Boomerang as a Brazilian version of the Trado, patented when DAF's patent ran out (early sixties).

The Boomerang is described as a "walking beam" conversion and was applied to Cascavel & Urutu armoured cars and APC series as wel as several Brazilian 6x6 truck designs and conversions.

But what is it? What's a walking beam? Is it similar to the Trado?
How does this work?

If similar that would mean that the post-war DAF series of military trucks and those by Engesa would be related regarding their powered axles configuration.

Brazilian websites mention the boomerang as an indigenous invention (well, that may be legally the case) and no one refers to any DAF trado connection or example.

Who knows more of this?

Greetings,
Nuyt