Why Skipper · Hull Design & Performance
THE BEST HULL DESIGN AND PERFORMANCE OF ANY VESSEL
Book a Sea TrialEvery boat builder claims performance. Only one builds the world's sole production 4-step hull, and the numbers prove the difference. Skipper Powerboats' patented AeroQuad® hull architecture delivers what no conventional vessel can: planing from just 11 knots, top speeds of up to 90 knots, and fuel consumption that defies the size of the boat.
This is not marketing language. It is hydrodynamics, refined through computational fluid dynamics, scaled-model testing and full-size prototyping in the open waters of the Aegean Sea.
The Problem Every Other Hull Has
To understand why Skipper's hull is different, you need to understand what holds every other vessel back: wetted surface.
The more hull touching the water, the more friction. The more friction, the more horsepower you burn just to overcome drag. Traditional deep-V hulls, the industry standard since the 1960s, ride on a continuous wetted surface from bow to stern. They handle rough water well, but they pay for it in drag, fuel consumption and the need for oversized engines to reach high speeds.
Stepped hulls solved part of this problem. A step is a notch cut across the hull bottom that breaks up water flow and draws in air, ventilating the running surface and reducing friction: higher speed from the same horsepower, and lower fuel burn at cruise.
But most builders stop at one or two steps. Skipper engineered four.
The AeroQuad® 4-Step Hull
How It Works
The AeroQuad® hull is the only 4-step hull in production worldwide. Four transverse steps, each calibrated through CFD modelling, work together to do four things.
Generate a controlled air cushion
Each step draws air beneath the hull, creating controlled air channels, effectively an air-lubricated running surface between the boat and the water. Drag drops dramatically because the boat is riding partly on air, not water.
Reduce wetted surface at speed
As the hull lifts onto its steps, only small, optimised sections remain in contact with the water. Less contact, less friction, more of your horsepower converted into forward motion.
Distribute lift across four points
Single-step hulls concentrate lift at one point, the historic cause of stepped-hull instability. Four calibrated steps spread lift evenly, keeping the boat balanced, level and predictable, including in aggressive high-speed turns.
Maintain attitude without bow rise
The 4-step geometry planes the boat almost flat, with minimal bow rise. The helm keeps full forward visibility from throttle-up to top speed.
The Supporting Geometry
- 24° transom deadrise: a sharp V at the stern that slices through chop and softens wave impact, proven in demanding Aegean Sea conditions.
- Variable deadrise distribution: the V-angle changes along the hull length, sharp where it meets waves, optimised for lift where the hull runs.
- Precision strake & chine geometry: spray rails deflect water outward and down, producing one of the driest rides in any vessel category.
The Numbers
The Performance
| Model | LOA | Max Power | Top Speed | Fuel & Efficiency | |
|---|---|---|---|---|---|
| ACE 360 | 10.85 m | 2×400 HP | 78 knots | 700 lt · AeroQuad™ efficiency | View Model |
| 34NC | 9.95 m | 2× 450HP | 80 knots | Efficient 4-step hull | Enquire |
| 38NC | 11.53 m | 2×500 HP | 80 knots | 680 lt · long-range deep-V | View Model |
| 42NC (flagship) | 12.40 m | 4×500 HP | 50–70 kn cruise, up to 90 kn on quad 500s | 2.0–2.5 L/nm · ≈ 350–500 nm | View Model |
Planing at 11 knots
Most performance hulls need 18 to 25 knots to climb onto plane. The AeroQuad® hull planes at around 11 knots, into efficient running mode almost immediately.
35+ knot efficiency zone
Stepped hulls deliver their efficiency gains above roughly 35 knots. Skipper boats live in this zone, with their entire operating envelope sitting where the design pays maximum dividends.
Speed without oversized engines
An 80-knot 34NC runs twin 450s. Comparable conventional hulls need significantly more installed horsepower, and burn proportionally more fuel.
By Vessel Class
Why This Beats Every Other Vessel
Versus deep-V hulls
The deep-V is predictable but inefficient, dragging its full wetted surface through the water at all times. The AeroQuad® hull keeps the deep-V's 24° entry where it matters, at the transom and forward sections meeting waves, while eliminating the drag penalty everywhere else.
Versus single & twin-step hulls
Fewer steps mean lift concentrated at fewer points, the historic cause of stepped-hull instability in turns. Four CFD-calibrated steps distribute lift for stability that single-step designs cannot match.
Versus catamarans & multihulls
Multihulls achieve efficiency through twin slender hulls but sacrifice the soft, banking ride of a monohull and struggle in confused seas. The AeroQuad® delivers multihull-grade efficiency from a monohull platform with superior rough-water manners.
Versus conventional RIBs
Most RIB builders fit a standard deep-V beneath inflatable collars. Skipper engineered the hull first (racing DNA, four steps, ventilated running surface), then matched it with ORCA® fabric collars that add buoyancy and impact absorption without compromising the hydrodynamics.
Built to Hold the Performance
A stepped hull running at 80 knots endures enormous structural loads. Skipper's construction is engineered for exactly this.
- /Vacuum infusion moulding with epoxy resins and multi-directional fibreglass, lighter and stronger than hand-laid GRP, with precise resin-to-fibre ratios.
- /Carbon fibre reinforcement in key structural elements, cutting weight where it improves both speed and fuel efficiency.
- /Hand-built in-house at the 3,000 m² BSK Marine facility in Koropi, Athens, with every hull, stringer, bulkhead and transom built by the factory's own team.
- /2-year structural hull and deck warranty covering stringers, bulkheads, engine mounts, transom and deck-to-hull joints.
The credentials back it up: Skipper won a Red Dot Design Award within a year of founding, the only Greek boat builder ever to receive one, and just the second boat worldwide at the time. Learn more about the manufacturer at skipper-bsk.com.
The Verdict
Hull design is physics, and physics doesn't negotiate. Less wetted surface means less drag. Less drag means more speed and less fuel from the same horsepower. Distributed lift means stability at any velocity.
Skipper Powerboats is the only builder in the world producing a 4-step hull, a vessel that planes earlier, runs faster, burns less and rides drier than anything else on the water. That is not a claim. It is a measurement.
Common Questions
Frequently Asked
What is a 4-step hull?+
A 4-step hull features four transverse notches across the hull bottom that draw air beneath the boat at speed. This ventilation creates an air cushion that reduces wetted surface and friction, delivering higher speeds and lower fuel consumption than conventional hulls. Skipper Powerboats builds the only production 4-step hull in the world.
How fast are Skipper boats?+
Skipper Powerboats reach 50 to 90 knots depending on model and engine configuration. The 34NC achieves up to 80 knots, the ACE 360 reaches 78 knots, the 38NC reaches up to 80 knots, and the 42NC flagship reaches up to 90 knots, among the fastest production RIBs available.
Are stepped hulls stable at high speed?+
Single-step hulls historically had stability issues because lift concentrated at one point. Skipper's AeroQuad® hull solves this with four CFD-calibrated steps that distribute lift evenly, delivering balanced, predictable handling in high-speed turns and rough seas.
Why do Skipper hulls use less fuel?+
The four steps ventilate the hull with air, reducing the wetted surface in contact with the water. Less surface contact means less friction, so the engines work less to maintain speed, delivering high performance without oversized, fuel-hungry powerplants.
What deadrise do Skipper hulls have?+
Skipper hulls run a 24° transom deadrise with variable deadrise distribution along the hull length, sharp enough to soften wave impacts offshore, optimised for lift and efficiency at speed.