Hi John
I always assumed the mast was moved back on the DCB and Hijack because the of the foil. I.E. With all the potential lift at the back of the boat the designer is trying to move the C of G aft to make use of it. If thats the case the new designs will only have a real advantage once the crew are at the back of the boat... which for most people is not the norm when 12 sailing. Or is there something much cleverer happening?
Trim tabs... thats a whole different subject and I guess if the boats at the front are using them they must help. Has any one fitted similar to an older design with any success?
So how much playing has been done with foils. The two questions I would have are...
All the angles. Why the sweep back and anhedral/dihedral. When I made ours its was just straight across largely for simplicity and strength but secondly because as the boat/rudder moves and the direction of flow changes over the foil it will create more or less left on each side... which sounded bad?
Height. I think all agree it needs to be as high as possible to interact with the stern wave etc but you dont want the tip breaking the surface... or do you? how high is to high.
Thanks all
Ian
I always assumed the mast was moved back on the DCB and Hijack because the of the foil. I.E. With all the potential lift at the back of the boat the designer is trying to move the C of G aft to make use of it. If thats the case the new designs will only have a real advantage once the crew are at the back of the boat... which for most people is not the norm when 12 sailing. Or is there something much cleverer happening?
Trim tabs... thats a whole different subject and I guess if the boats at the front are using them they must help. Has any one fitted similar to an older design with any success?
So how much playing has been done with foils. The two questions I would have are...
All the angles. Why the sweep back and anhedral/dihedral. When I made ours its was just straight across largely for simplicity and strength but secondly because as the boat/rudder moves and the direction of flow changes over the foil it will create more or less left on each side... which sounded bad?
Height. I think all agree it needs to be as high as possible to interact with the stern wave etc but you dont want the tip breaking the surface... or do you? how high is to high.
Thanks all
Ian