Birdyfish S
Cat (Marconi) · Foiling Monohull · First built 2025
A 4.2-metre foiling monohull with a 100kg displacement and a high-performance Marconi cat rig
Designed by Mm Process.
- LOA
- Beam
- Draft (max)
- Displacement
- Hull type
- Foiling Monohull
See her sail
The Birdyfish S, on the water
The fleet's own footage — the truest look at how she really moves.
Footage from Practical Sailor
Is it for you?
Character
Where this design lands on the numbers a shopper trusts — read straight from her own ratios.
At 3.67 she sits above the 2.0 line — beamy for her weight, and happiest coastal.
46.3 — a lot of sail for her weight; powered-up and eager, a real performer.
Powered-up and quick to accelerate — this one likes to sail.
- Lighter than ~90% of boats her size on file
- Draws more than ~89% of boats her size on file
- Narrower than ~92% of boats her size on file
Compared with 40 boats of the same type within a quarter of her length.
The living fleet
Sailed by the fleet
Where the fleet has filmed this boat.
Seen once across one channel of the fleet.
The record
Full specifications
The complete reference set — tap any figure to switch between metric and imperial.
The family
Related models
The designs closest to hers — usually the rest of the builder's range, sometimes the same hull sold under another name.
Keep asking
The fleet has more to say
Search what's been said about the Birdyfish S, or ask a specific question — the answer comes back written out, with links to the moments it draws on.
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