Algodoo

Not really realistic—your trebs have a mass ratio (CW/ammo) of 4000:1. The most ridiculous treb around today (Yankee Siege, current pumpkin-throw world-record holder, can throw 100lbs 2000ft) has an MR of only like 600:1—and that record was set at half or a quarter of that. If you allow an MR as absurdly high as yours, then yes, breaking the arm up will allow a treb of a given bounding-box size to throw further. A realistic treb will already be running at near-maximum efficiency.

I built a treb a while back that can throw the same 5kg farther than your supertreb with only 400kg of CW (MR of only 80:1)—and I suspect could throw somewhat farther with a little tuning.

http://www.algodoo.com/algobox/details.php?id=34461

Thanks for feedback.
I'll try to make treb with smaller mass ratio. My goal is to reach supersonic speed with normal sized machine. I arleady archieved that but at mass ratio of over 8000.
I think this design is realistic in the way that parts have more or less realistic weight (but carbon composites could be needed ).

Congrats on scene of the week
Interesting design, i would like to any improvements you make to this.