Robi,

>>So in simple words.
>>The F16 can use carbon beams that are NOT permanentley attached to the hulls.


Indeed, choice of material is still unlimited in the Formula 16 class. In any respect.

This answer your next question as well.

>>I have been trying to find anything related to the mast Wouter. Can the mast be made out of carbon, or striclty aluminum?

You can even make it out of bamboo or timber if you want to. As of yet (and most likely to remain this way) there are NO material constraints in the F16 rules AT ALL. This of course includes the mast.

With some pride I notice that the F16 rules still limit mildly shapes, dimensions and way of operation. Nothing else. It is therefor still very pure in its formula format.

Wouter