3 ms·
maintenance. the materials used for actual sails stretches eventually and is less effective. presumably these towers have very little to replace.
by interdocken 8y ago
maintenance. the materials used for actual sails stretches eventually and is less effective. presumably these towers have very little to replace.
- jhayward 8y agoThey have a very expensive, hard to replace, and high maintenance bearing at the base of the tower that carries the full force of the sail leveraged by a long moment arm. This bearing (along with lack of height = low wind) has been the reason that Flettner sails and wind turbines haven't been economical in the past.