this post was submitted on 17 Mar 2024
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A cargo ship’s ‘WindWing’ sails saved it up to 12 tons of fuel per day (www.popsci.com)
submitted 8 months ago by ProdigalFrog@slrpnk.net to c/climate@slrpnk.net
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[–] ProdigalFrog@slrpnk.net 16 points 8 months ago (1 children)

According to that video, they fold out of the way. I'm not sure if they currently fold on the real ones. The article mentions:

the 125-feet of height added by WindWings could potentially complicate docking in many locations. According to Jan Dieleman, president of Cargill’s Ocean Transportation business, they’re already working to address such issues.

Which seems to imply they don't. Their solution of modifying ports to accommodate the sails might mean the folding aspect wasn't viable?

[–] Zpiritual@lemm.ee 6 points 8 months ago

Not sure about this one example but working in the industry and following the development of wing sails the ones I've seen will fold one way or the other. This example in the article is probably a prototype or even experimental implementation to test the efficency.

Examples of folding sails in development: https://www.theoceanbird.com/oceanbird-wing-560/

https://terntank.com/2023/02/sail-into-the-future/