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?
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.
The biggest downside I could see is the sails getting in the way of cranes.
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:
Which seems to imply they don’t. Their solution of modifying ports to accommodate the sails might mean the folding aspect wasn’t viable?
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/
You wouldn’t need them in port so make them easy to disconnect or compact into a smaller space.