Hello,
In The Boat Whisperer Upwind DVD
Location: Title 2, Chapter 4 @ 7:29
he is talking about weather helm, tipping the boat forward, moving the wet-to-surface area forward...
(first time I've heard anyone call it "wet-to-surface area" ??? - but I got the idea - british nomenclature?)
He makes a statement which I do not understand:
"as the wet-to-(?wetter?)-surface area goes forward... the sail plan is effectly 'FURTHER BEHIND' the wet-to-surface area... generating windward helm... which means you have to move the rudder harder over to keep you in a straight line"
I get what he is saying -- it's a viscious cycle.
But I would like to understand the physics so I can teach the principle in future lessons.
When he says the sail plan is "behind" to wet-to-surface area. Doesn't he mean further forward.
If you are tipping the boat forward, the mast would then go further forward (not backward).
So is he using the word "behind" to talk about the direction of the vector of the tipping motion and not a position in space?
I don't windsurf much and need to read more about adjusting masts in relationship to sailing...
I actually thought pushing the mast forward causes the boat to bear off.
If that logic is correct, then maybe he is talking about the sail plan going behind as in aft which would cause the boat to head up....
I really need to attend one of those North U lectures on trim - or bust open the book and start reading it.
In googling on this topic, I just skimmed:
http://sailing.about.com/u/sty/adva...Using-CE-and-CLR-to-Sail-without-a-Rudder.htm
It reminded me leeward heel - obviously makes the boat head up -- when he says "sail plan behind" is just referring to it causing more leeward heel?
Maybe I don't understand "sail plan" vs "mast rake" - which the link confirmed my thoughts of mast foward -- bear off.
Looking for some clarity.
In The Boat Whisperer Upwind DVD
Location: Title 2, Chapter 4 @ 7:29
he is talking about weather helm, tipping the boat forward, moving the wet-to-surface area forward...
(first time I've heard anyone call it "wet-to-surface area" ??? - but I got the idea - british nomenclature?)
He makes a statement which I do not understand:
"as the wet-to-(?wetter?)-surface area goes forward... the sail plan is effectly 'FURTHER BEHIND' the wet-to-surface area... generating windward helm... which means you have to move the rudder harder over to keep you in a straight line"
I get what he is saying -- it's a viscious cycle.
But I would like to understand the physics so I can teach the principle in future lessons.
When he says the sail plan is "behind" to wet-to-surface area. Doesn't he mean further forward.
If you are tipping the boat forward, the mast would then go further forward (not backward).
So is he using the word "behind" to talk about the direction of the vector of the tipping motion and not a position in space?
I don't windsurf much and need to read more about adjusting masts in relationship to sailing...
I actually thought pushing the mast forward causes the boat to bear off.
If that logic is correct, then maybe he is talking about the sail plan going behind as in aft which would cause the boat to head up....
I really need to attend one of those North U lectures on trim - or bust open the book and start reading it.
In googling on this topic, I just skimmed:
http://sailing.about.com/u/sty/adva...Using-CE-and-CLR-to-Sail-without-a-Rudder.htm
It reminded me leeward heel - obviously makes the boat head up -- when he says "sail plan behind" is just referring to it causing more leeward heel?
Maybe I don't understand "sail plan" vs "mast rake" - which the link confirmed my thoughts of mast foward -- bear off.
Looking for some clarity.