Thank you so much for the links. Had no idea such research was going on. Had a good look at ecologic and their manta. Most impressive.
Eager to learn as much as I can about cruising cats, I just reread this - some might say, hijacked thread-, and am reminded of a philosophical...
If a dead whale can do 1 knot imagine what a live cat can do! thanks NV.
Many Thanks tspeer, it illustrates clearly how the alternating vertical force is multiplied to a horizontal direction.
Thanks for the replys and video s. Never been close to a manta but sounds promising. A horizontal dagger board profile, maybe 2or 3ft long both...
It occurred to me that if propellers were efficient then nature would have put them on at least some marine species. When hovering 3 metres above...
