Looking over the data provided in the above post.

I think we see a situation developping where designing for the weight range of 50-75 kg is most smart.

We need the upper limit to be as high as at least 75kg to be able to carry 2 normal sized 12 year olds (80 kg would be better still). The same limit guarantees that 94% of the 16 year olds can still race the F12. Side advantage (marketing) is that the majority of parents can then also sail the F12.

The lower limit needs to be at least at 50kg to be able to start moving the top 20% of the 12 year olds into solo sailing the F12.

This 50-75 kg weight range will see the youths singlehanding from 20% at 12 to 94% at 16, the age range Ncik specifies as youths and as the target group for the F12.

If we drop the max weight to 65kg then 1/3rd of the 16 year olds will not be competitive anymore (compared to only 6% when the limit was at 75kg). The competitive participation level at 16 is dropping fast with each kg that is removed from the upper limit.

Personally, I see much reason to follow Luiz suggestion to split the fleet into two racing fleets. As in "below 60 kg" weight and "above 60 kg" weight. That should take care of the bulk od the performance inequality.

Wouter