Originally Posted by mac33
at 54kg a 7.5m is huge.
It's certainly too small to start planing as of 6 knots of wind.
i use a fanatic 75 wide by 275 long, this board with my 7.7m is big enough for my 67kg.
Again, your combo is for sure way too small to plane as of 6 knots of wind. With a 77 cm wide board and a 7.7 m2 sail, I need 11 knots of wind to start and sustain planing with my 65 kg. With the same board + larger fin and a 11 m2 sail, I need 7 knots of wind. To plane as of 6 knots, I need a Formula and an 11m2 sail. The difference between planing in 11 knots or in 6 knots of wind is huge: 4 Bft vs 2 Bft wind.
I'm pretty sure Morane can plane as of 6 knots of wind with a Formula and a 10 m2 sail, but the initial question was whether a Formula is mandatory to achieve this goal at 54 kg. Let see what Morane has to say about that.