Fouga
ZFW is a function of W&B not performance the latter, in terms of weight, concerns itself purely with mass.
To all the other confused of this site with regards to ZFW MZFW whilst the aircraft is on the ground; please consider the following:
Aircraft manufacturers and designers expect their products to spend a good deal of their useful life in the air, not on the ground. Therefor all structural restrictions concern the aircraft in the air and not on the ground (with the exception of max taxi wt, for the picky)
Man dispatcher. You may load your aircraft to the gunnels whilst on the ground without fuel in the wings, they will not fall off. However if you launch your aircraft into the air without fuel in the wings (presumably you're going to tow it into the sky) and you have exceeded the MZFW, then the wings will depart company with the fuselage at the wing root as the lever moment (created by LIFT a product which is not associated with stationary aircraft on the ground) exceeds the design loads.
This must surely be the end of this thread.
Question for the technically minded.
Take off performance - which aircraft achieved V2 before V1?
FEBA