Arbok Rotor Wind (ARW)

Overview

ARW is a next-generation rotor sail built on a super-circulation aerodynamic profile developed over a decade of helicopter aerodynamics research. It is a vertical rotating cylinder generating thrust through the Magnus effect, but the new wing profile amplifies that effect several-fold: ANSYS simulations confirmed aerodynamic efficiency of k = 90–100 and critical angles of attack of 40–50°, validated in both aerodynamic and hydrodynamic tunnels. The result is 2–4× higher thrust efficiency than classical rotor sails, delivering 40–50 % fuel savings against the 10–20 % typical of existing systems, while drawing only 0.5–1.0 % of vessel electrical load.

Applications

Tankers; bulk carriers; container ships; Ro-Ro vessels; passenger ships; special-purpose vessels. Scalable from small ships to large ocean-going vessels, and suitable for both newbuilds and retrofits.

Industry problems addressed: fuel costs reaching 50 % of operating expenses; IMO 2030 and IMO 2050 decarbonization requirements; EU Emission Trading System carbon taxation; the limited 10–20 % efficiency of existing rotor sails; the need to modernize fleets without infrastructure overhaul.

Operating Principle

ARW is a vertical rotating cylinder fitted with a next-generation aerodynamic profile. Thrust is generated through the Magnus effect, significantly amplified by super-circulation.

The profile originates in aviation. A decade of research into advanced aerodynamics and circulation-based control systems for helicopters — aimed at reducing noise, improving energy efficiency and eliminating vulnerable mechanical components — produced a super-circulation profile with lift-to-drag ratio k = 100–130, critical angles of attack up to 400–500°, stable performance across a wide range of flow speeds, and exceptionally low noise and vibration. That profile was then adapted for maritime use, yielding k = 90–100 and critical angles of 40–50° in the marine configuration, confirmed by ANSYS modelling and by model tests in aerodynamic and hydrodynamic tunnels.

Key operating characteristics: high lift at low rotational speeds; automatic adaptation to wind conditions; extremely low energy consumption; safe operation in all climates; compatibility with newbuilds and retrofits without major structural changes.

Key Parameters

| Parameter | Value |

|---|---|

| Fuel savings | 40–50 % (standard rotor sails: 10–20 %) |

| CO₂ reduction | up to 50 % (standard rotor sails: up to 20 %) |

| Aerodynamic efficiency | k = 90–130 |

| Critical angle of attack (marine profile) | 40–50° |

| Thrust efficiency vs classical rotor sails | 2–4× higher |

| Rotor energy consumption | 5–10× lower than conventional rotors |

| Electrical load on vessel | 0.5–1.0 % |

| Reduction of load on main propulsion | 25–30 % |

| Noise reduction | 80–90 % |

| IMO 2030 compliance | full |

| Retrofit complexity | low |

| Rotor dimensions (large cargo ship) | 24 m height × 4 m diameter |

| Deck footprint | ~200–300 m² |

| CO₂ saved per vessel | 12,000–15,000 t/year |

| Lift coefficient vs unoptimized cylinder | k = 90–130 against 20–40 |

| Auxiliary spin | self-powered from ship's electrical/hydraulic systems |

| Control | autonomous wind tracking, adaptive RPM, auto-shutdown above 25 knots |

| Maintenance | medium — no sails to tear, no winches; periodic rotor inspection |

Comparative performance:

| Characteristic | Conventional engines | Standard rotor sails | ARW |

|---|---|---|---|

| Fuel savings | 0 % | 10–20 % | 40–50 % |

| CO₂ reduction | 0 % | up to 20 % | up to 50 % |

| Aerodynamic efficiency | none | moderate | k = 90–130 |

| Low-wind performance | none | limited | excellent |

| Headwind performance | none | limited | excellent |

| Energy consumption | none | moderate | very low |

| Retrofit complexity | none | medium | low |

| IMO 2030 compliance | no | partial | full |

Architecture and Components

Vertical rotating cylinder carrying the super-circulation aerodynamic profile; drive and rotation control system; automatic wind-adaptation control; deck mounting interface. Construction is simplified relative to conventional rotor sails — fewer moving parts, reduced vibration, high resistance to storm loads, extended component lifespan, and reduced material usage.

Integration requires vessel type, deck layout, structural load data and automation requirements; no major structural modification of the hull.

Advantages

Technical: 5–10× lower rotor energy consumption, drawing only 0.5–1.0 % of vessel electrical load; 25–30 % reduction in load on the main propulsion system; stable thrust under variable winds with fast response to direction changes; effective operation in low-wind and headwind conditions where conventional rotors are limited; noise reduction of 80–90 %.

Reliability: fewer moving parts, reduced vibration, high resistance to storm loads, extended component lifespan.

Economic: reduced material usage, lower production cost, reduced maintenance expense.

Regulatory: full IMO 2030 compliance; directly improves CII and EEXI ratings; supports IMO 2050 trajectory.

Strategic: one of the few technologies that both cuts emissions and generates income, through surplus carbon credit sales.

Integrations

Suitable for newbuilds and retrofits across the commercial fleet without major structural change. Partnership model: Arbok provides technology and test results, technical drawings and documentation under NDA, engineering participation, prototype and demonstration support, certification assistance, and digital aerodynamic models; the shipyard partner provides yard capability, engineering integration, prototype manufacturing, vessel access for trials and commercial deployment.

ARBOK-Glide · ARBOK-LINER (ALB) · Arbok-Wind · ARBOK-JUMBO

Deployment & Operation

Implementation timeline:

1. ARW adaptation to selected vessel — 3–4 months
2. Prototype design and manufacturing — 6–9 months
3. Sea trials — 6–12 months
4. Serial production preparation — 12–18 months

Operation: automatic adaptation to wind conditions; safe in all climates; medium maintenance requirement.

TRL

TRL 4 (confirmed by Michael). Digital models validated in ANSYS; aerodynamic efficiency and critical angles confirmed by wind-tunnel and hydrodynamic tunnel testing of scale models. Prototype manufacture and sea trials remain ahead.

Market Potential

Fuel accounts for up to 50 % of vessel operating expenses, and the regulatory environment is tightening on two fronts simultaneously — IMO 2030 and 2050 decarbonization targets, and EU ETS carbon pricing at €90–110 per tonne of CO₂. Existing rotor sails deliver only 10–20 % savings, which has limited adoption. ARW's 40–50 % savings change that calculation across the commercial fleet — tankers, bulkers, container ships, Ro-Ro and passenger vessels.

Typical Project Economics

Reference vessel consuming 10,000 tonnes of fuel per year and emitting 30,000 tonnes of CO₂ per year:

| Source | Annual value |

|---|---|

| Fuel savings (4,000–5,000 t/year) | $2.4–3.5 million |

| EU ETS carbon savings (15,000 t × €100) | €1.2–1.5 million |

| Carbon credit sales (vessels outside EU) | €1.2–1.5 million |

| Reduced maintenance | $200,000–400,000 |

| Total benefit | $4.5–6.5 million/year |

CO₂ reduction: 15,000 tonnes per year, halving emissions for the reference vessel.

Risk Factors

The technology is unpatented by design, so protection rests entirely on NDA and partnership structure — this limits how the technology can be marketed and financed. Test documentation requires financial support to be brought to EU and US standards. Prototype manufacture and sea trials are still ahead, so all performance figures derive from ANSYS modelling and scale-model tunnel testing rather than full-scale operation.

> Внешние документы: k = 90–130 (подтверждено Михаилом, июль 2026). Внутренняя разбивка — авиационный профиль k = 100–130 при углах 400–500°, морской профиль k = 90–100 при углах 40–50° — во внешние материалы не выносится.

Related Technologies

ARBOK-Glide · ARBOK-LINER (ALB) · Arbok-Wind · ARBOK-JUMBO