I just got two totally different opinions so could somebody please clarify and explain why or why not it is allowed to add more weight to the arm with the cw side as long as it does not go into launch motion without the cw?
Okay, I think I know what you mean.
You can add weight onto the arm, as much as you want(however lighter arms are better), as long as the trebuchet doesn't go into a firing position without the counterweight. For example, I went to states a few weeks ago, and during impound I was told the trebuchet was illegal because it went into a firing position without the counterweight, we added weight to the arm to stop the energy, it was fine after that.
On a different subject, how far are the F.A.T.s launching? I did pretty horribly at state competition and only launched somewhere around 8.7 meters with 3 kg and a 60g projectile.
With 3kg and 60g projectile we are shooting 15 meters.
It can throw 25+ overall.