Yes it does work in both direction with foil to leeward. Its more of a broad reach than a close haul do to the wind being side off shore there. Being as i don't want to swim out to get model.
Foil to lee as in video can not be used to windward. Its a lifting foil. To counter heeling to leeward. It reqiures a different foil section to windward. A foil that produces negative lift. Countering heeling force from windward. With the correct foil section windward no foil leeward and with the same sail. The proa just weather cocks no foward drive at all. But position sail area foward like sprit rig on A frame and it produces balanced foward drive. Add both foils for monohull shunting craft
I wonder if a canted rig (tilted to windward) would allow the use of a smaller foil, and decrease the foil drag. The problem with foils is that as the speed increases out of a model range the drag increases radically and limits the speed capability. That is why all the sail speeding records are from planing type craft which sidestep that problem.
I see sort of where your coming from and don't totally agree. But my first intention of the model was in succsession to other models. Exploring the possiblities in controling heeling moment with out weight. Also to sail with no under water appendages on hull. Using hull form only to prevent leeway and channel lateral force into foreward drive. It was not my intension to design a speed sailing machine.
does the foil shape work in both directions (still on the lee) when shunting?
fuckfannyfiddlefart 2 years ago
Yes it does work in both direction with foil to leeward. Its more of a broad reach than a close haul do to the wind being side off shore there. Being as i don't want to swim out to get model.
tsstproa 2 years ago
How does it sail when the foil is windward ?
ggakahagasan 3 years ago
Foil to lee as in video can not be used to windward. Its a lifting foil. To counter heeling to leeward. It reqiures a different foil section to windward. A foil that produces negative lift. Countering heeling force from windward. With the correct foil section windward no foil leeward and with the same sail. The proa just weather cocks no foward drive at all. But position sail area foward like sprit rig on A frame and it produces balanced foward drive. Add both foils for monohull shunting craft
tsstproa 3 years ago
I wonder if a canted rig (tilted to windward) would allow the use of a smaller foil, and decrease the foil drag. The problem with foils is that as the speed increases out of a model range the drag increases radically and limits the speed capability. That is why all the sail speeding records are from planing type craft which sidestep that problem.
macrumpton 4 years ago
I see sort of where your coming from and don't totally agree. But my first intention of the model was in succsession to other models. Exploring the possiblities in controling heeling moment with out weight. Also to sail with no under water appendages on hull. Using hull form only to prevent leeway and channel lateral force into foreward drive. It was not my intension to design a speed sailing machine.
tsstproa 3 years ago
Check out the hydroptere. There are serious efforts to do beat the sails speed record with your idea.
Good Work
barnettmatt 3 years ago