Foil • Skimmer • Double Foil From flying boats to intelligent glide

Why Skimmer (and why double foil)

We explored full-flight hydrofoils for years. We made boats fly. Then we made a decision: stop chasing “visible flight” and focus on what truly matters in real-world use — stability, efficiency, simplicity, and a better glide at reasonable speed.

Image placeholder — full-flight phase (3 foils / 2 foils). Replace with your own photo.

What full-flight teaches you (fast)

  • Flying requires a minimum speed (no compromise)
  • Trim and pitch need constant control (complex)
  • Payload changes everything (1 rider, 2 riders, different weights)
  • Electronics become central (cost, fragility, maintenance)

Flying can be spectacular. But for an accessible, robust and scalable leisure boat, we found a better answer: Skimming at water level.

The real problem is not “flying” — it’s drag

A conventional boat stays fully immersed. Immersion creates hydrodynamic drag, energy loss, waves, and noise. So the real question is not “How do we leave the water?” but:

How do we reduce wetted surface as much as possible, without creating new constraints?

What is a Skimmer?

A Skimmer is neither a conventional planing boat nor a full-flight hydrofoil. It is based on partial lift: the foil carries a meaningful share of the boat’s weight, while the hull keeps a controlled contact with the water.

Partial lift, not full flight

The boat runs at water level, not above it. You keep the benefits of lift while avoiding the instability and speed constraints of full flight.

Efficiency where it matters

Less wetted surface means less drag — typically 30–40% energy savings compared to a fully immersed hull, at comparable “usable” speed.

Low-speed control

Skimming remains controllable at low speed. No “minimum flight speed” barrier. It stays predictable for novices, families, and professional operations.

The Skimmer approach is a pragmatic answer: you gain glide and efficiency without introducing fragile dependencies (active foil control, complex sensor loops, strict speed thresholds).

Skimmer at water level
Image placeholder — skimming at water level. Replace with your own photo.

From mono foil to double foil

Our first Skimmers validated the power of a simple fixed foil. But intensive real-world use revealed a key truth: when you open the boat to all payloads, all profiles, and daily operations, stability becomes the priority.

Why double foil

Better lift distribution means a more stable trim and a more consistent behavior with changing passenger weight and conditions.

Passive stability

The goal is not to “fly more”. The goal is to stabilize skimming without adding complexity: no sensors, no active control.

Predictable driving

For leisure operations, predictability is everything: smooth turns, controlled glide, and intuitive handling — even for first-time users.

The key innovation: mass transfer

Foil performance depends on trim. Our patented mass transfer system moves the battery pack longitudinally to place the boat in its optimal attitude.

Trim optimization

Constant “right position” on the waterline to extract maximum efficiency from partial lift.

Consistency

Stable behavior across different rider weights and operating conditions.

Efficiency + sensation

Less drag, smoother glide, better driving feel — without needing higher speed.

The foil provides lift. The mass transfer places the boat exactly where lift is most efficient.

Timeline — 7 years to reach the right answer

The Skimmer is not a shortcut. It is the result of years of prototypes, tests, and real-world operation.

2018

Full-flight exploration

Three-foil configurations, sensors and thermal propulsion. The boat flies — complexity shows up immediately.

2019

Transition to electric

Custom electric propulsion development. Efficiency and operational simplicity become central.

2020

Bi-foil prototypes & reality check

Two-foil flight improves stability, but remains speed-dependent and electronically demanding.

2021

Birth of the Skimmer + mass transfer patent

We move away from full flight. Fixed foil, dedicated hull, and a patented mass transfer system to optimize trim.

2022

Field validation

Sea and freshwater testing confirm stability, efficiency and low-maintenance operation.

2023–2024

Real-world operation

Multiple seasons, thousands of users, intensive professional use. The concept proves itself outside the lab.

Today

Double foil

A logical refinement: more passive stability for skimming, same philosophy, same simplicity.

Why we stopped trying to make boats fly

Because our goal is not to impress for 30 seconds. Our goal is to deliver a boat that is accessible, safe, energy-efficient, easy to operate, and robust — with a glide that feels exceptional at reasonable speed.

We didn’t stop flying because we failed.
We stopped flying because we understood what truly matters in real-world use.
Double foil skimming
Image placeholder — double foil / stable skimming. Replace with your own photo.