As in the title, I'm sure I've read somewhere that you can measure a 6 as an A class. Is this possible and is there any advantage to be had? Do you lose or gain sail area, etc.?

Gary

It has been done and many years ago a six measured as an A won the natioals, I believe you would need to alter the draught and change the sail area possibly a different mast, the conversion would give you a good libht airs A but not very effective in any other conditions

I'm told that Ian Cole ran his Renaissance with an alternate fin and rig and won the A Class Nats in light airs at Woodspring some years ago, Ian sadly no longer with us.  It would have had terrific acceleration and manoeuvrability.  There was a very light weight A, perhaps 10 kg, that I saw at a PRACC series once or twice with similar characteristics, but it was all for nothing as and when the wind strengthened.