What is the wind worth to your ship?
Enter one vessel. See how much of the work the wind takes on, the fuel and carbon it saves, and how soon the rigs pay for themselves.
How the numbers are made.
Rig sizing and thrust. Rig size follows deadweight (36 m below 84,000 DWT, 45 m below 195,000 DWT, 55 m above) with rated thrust of 67, 100 and 150 kN per rig, as in Windship's published fuel-saving calculator.
Hull resistance. DWT2/3 × speed2.45 ÷ 1,425 × 0.96, in kN, from the same published method. Speed under sail alone solves the same equation for the rated wind thrust.
Fuel and carbon. Fuel saved is the wind share of propulsion demand at service speed, times daily burn and days at sea. CO₂ at 3.114 tonnes per tonne of fuel. Carbon value applies your price to the share of emissions under carbon pricing.
Price and payback. USD 3.8 million per rig for the 36 m rig; larger rigs are priced per vessel. Payback is system price divided by annual fuel and carbon value; ten-year value is undiscounted and excludes installation, finance and operating costs.
FuelEU Maritime. The wind reward factor lowers a ship's attained GHG intensity: 0.99 at a wind-to-propulsion power ratio of 0.1, 0.97 at 0.2 and 0.95 at 0.3 or more. Shown here from the rated wind share as an indication only.
The Panamax reference case. The figures on the Home and Shipowners pages come from the reference-vessel model, which uses its own fuel profile. The calculator starts from 25 tonnes a day and 250 days at sea, so its defaults differ. Enter your own burn and days to compare like with like.
What moves the result. Route, season, speed and weather. This is an illustration, not a quotation. Send us one vessel and its routes and we'll return a route-based analysis.
We're looking for the first fleet.
An owner or operator who shares our belief and wants their vessels to be the ones the rest of the industry studies.