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Incremento de estabilidad y prestaciones


IFS Foils

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Mothquito foiling catamarán, la marca del foiling mas estable

Increased dynamic  stability

and performance  

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Welcome to the revolution !!

Mothquito IFS Foiling incorporates the patented IFS or Increased Foiling System.
The IFS is an innovative foil system that increases the dynamic length and beam of a boat to transform it into another one with greater dimensions in flight, thus increasing its longitudinal and transverse stability and providing safety, control and increased performance. Furthermore, the IFS system implements and combines a series of solutions that make foiling easy for everyone.




The dynamic length is the maximum bow / stern distance between the longitudinal support planes or foils.

Traditionally, the main foils tend to be located, if not in the center of gravity of the boat very close to it, approximately at the half of the length, so the dynamic length is significantly reduced, leaving the bows in the air without direct support, increasing longitudinal instability and the risk of nose dives or even pitch poles.


In a boat, the greater its dynamic length, the greater its longitudinal stability.

The IFS system increases the dynamic length of the Mothquito by advancing its main V-foils to advance the point of lift further forward, and delaying the rudder T-foils by means of extension arms that, by means of a lever effect (Archimedes), allows to delay the weight of the crew without changing the seat of the boat. In case of loss of support in flight, this favors a bounce against the surface without much loss of speed.

For a 3m helmet the Mothquito achieves a dynamic length of 3,4m.

With this solution, the rudder response is also smoothed, facilitating control of the boat at high speed. 

Mothquito, foiling, foiler, foils, hydrofoils, fly catamaran, IFS foiling, foiling catamaran, sail foiling, sailing foils, sail foils
Mothquito, IFS, foiling, foiler, foils, hydrofoils, fly catamaran, regata foils, sailing, sail, navegar, foilear, navegar a vela
Mothquito, IFS, foiling, foiler, foils, hydrofoils, fly catamaran, regata foils, sailing, sail, navegar, foilear, navegar a vela, foils en T, T foils

In the following comparison, the Mothquito is the boat with the smallest hull length, but even so it turns out that it is the second with the largest dynamic length, more than the 18' Fly Phantom and almost like the 28' SuperFoiler.



We define dynamic beam as the maximum cross distance between the foils.

By increasing the dynamic beam, the lift of the leeward foil increases the righting moment reducing the heeling and providing a better transverse stability of the flight. This significant increase in righting moment allows at the same time to increase the sail area to achieve an increase in performance.

vista frontal Mothquito, IFS, foiling, foiler, foils, hydrofoils, fly catamaran, regata foils, sailing, sail

The IFS system increases the dynamic beam of the Mothquito by means of outward facing V-foils, increasing its dynamic beam up to 270% with respect to the hull beam, that is to say from 1,8 m of to 4.8m of dynamic beam, which allows a sail area of ​​17,5 m2 (basic configuration) for a hull of only 3m in length.

​Other boats are also betting on dynamic beam increase systems by moving their foils away from the hull beam for increased performance, for example the AC75 or the Hydroptere, world record for speed sailing in 2009 with a record of 55.5 Knots.

The Hydroptere for example uses its outer hulls to house its oblique foils (half V), while the IFS system does so by means of a complete V that starts from the box-foils.

Mothquito, IFS, foiling, foiler, foils, hydrofoils, fly catamaran, regata foils, sailing, sail, manga dinámica, dynamic beam



The V-foils have the advantage of automatically regulating the flight height, without the need for flaps or sensors.
As the speed of the boat increases, the lift force increases, the boat rises reducing the wet surface of the foil, until the boat's own weight is greater than the lift and prevents the foils from leaving the water, automatically adjusting the height of the foiling. In other words, if the boat is raised too high, the submerged V is less and provides less climb, while if the boat descends, the V submerges increasing its surface and providing more lift to raise the boat again.

The V-foils implemented by the Mothquito have two breasts, the main or conventional V, and a second sine at the tip of the wing and oriented downwards, called by IFS as double lift, which has the function of increasing the lift thrust to reduce the transition time to flight mode. Once out of the water, this sine no longer produces friction.

This solution also increases safety since the foils have the tips facing downwards, they do not pose any risk to the crew in the case of MOB (man overboard).

Mothquito, IFS, foiling, foiler, foils, hydrofoils, fly catamaran, regata foils, sailing, sail, foiling live
Mothquito, IFS, foiling, foiler, foils, hydrofoils, fly catamaran, regata foils, sailing, sail

This system also offers the possibility of launching the boat from the shore, without having to carry it in search of draft, since it allows it to sail with its foils minimally lowered.


The Safe Foil System adds a joint on the top of the V-Foils masts that allows them to be set below the maximum working position, to then be able to pivot them up to vertical, leaving their wings inverted on the deck, facilitating use of a trolley adapted to the helmet beam.

The IFS "Safe Foils System" system that incorporates the Mothquito in its design, consists of box-foil integrated into the hull with its bottom outlet above the waterline. By hoisting the V-Foils, their wings are raised above the hull bottom, allowing the Mothquito not to damage their foils by contact with the ground or the trolley.



The increase in performance due to an increase in dynamic beam, as in the case of the Hydroptere has left other great examples of efficiency, some of them are the following:


In the following image we equate the support center of the V of the foils of the Mothquito with the dynamic beam of other foilers and even so it is only comparable to that of the SuperFoiler, a much larger 28 ”foiler.

The V-Foils of the Mothquito self-regulate the height of flight in foiling without the need for flaps or sensors. Orienting them outwards increases lateral stability and righting moment, which translates into a more stable and safe flight at high speeds. With its tips or winglets facing downwards, it is possible to accelerate the take-off and reduce the risk of accidents in case of falls into the water.
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