No he didn’t, as I’ve explained at least 3 times in this thread already, including in the comment you just replied to. He wrote:
“it became possible for sails to provide a lift force which is essentially perpendicular to the (apparent) wind velocity, in contrast to the drag force that is parallel to that velocity.”
No he didn’t, as I’ve explained at least 3 times in this thread already, including in the comment you just replied to. He wrote:
“it became possible for sails to provide a lift force which is essentially perpendicular to the (apparent) wind velocity, in contrast to the drag force that is parallel to that velocity.”
Perpendicular to the apparent wind velocity.