It sure has been a tough year for every aspect of our lives, including sailing - remember how some of you couldn't even get into your marina, but life now is pretty much back to normal - in Tucson, AZ anyway.
For month and months in the early parts of last year, understandably, I never heard from a fellow sailor. Sail trim was the last thing on the minds of sailors but that's now changing as things get back to normal. Recently, I spoke to a FL sailor. He wanted to master the TRAVELER. Normally, I don't discuss one specific control because ALL the sail trim controls for the main and jib have to work together and be properly set for the wind speed and point of sail or the boat doesn't go anywhere but I was SO happy to talk to a sailor that I decided to discuss the traveler. When I was part of Catalina 30 crew that raced in their national regattas my responsibility was the traveler.
I first asked if he knew WHAT the traveler was adjusting - he didn't. In my opinion, if you want to know how any devise works you should first understand what's it's doing. The traveler adjusts the ANGLE OF ATTACK. He asked what's angle of attack? In this case I violated my rule and I told him he didn't need to know -- in simple terms it's the angle between the reference line (chord line) and the oncoming air flow. I hate scientific explanations but what you're doing with the traveler is "turning the wind" to offset a pressure differential on the sail. It's the FLOW/PRESSURE OF AIR. On the leeward side you have high speed flow/low pressure and on the windward low speed/high pressure. These force, which are also present on the rudder and keel, produce SUCTION which cause the boat to move forward. You INCREASE the angle of attack by moving the traveler toward the center of the boat. As you do that you're increasing power and lift/drag -- I don't want to get into lift/drag. The same thing happens when you move the jib fairleads inboard. The reverse is also true - to DECREASE power and lift ease the traveler away from the center line. With most boats you don't want to go past the center line but with the C30 going a bit beyond the center line gave me a bit more speed..
With most sail trim controls, when you adjust them the shape of the sail changes but not with the traveler. I've uses this example many times to describe the action of the traveler. Picture your screen door with a pin in the outside corner that rides in a groove in the floor. When you open and close your screen door does the shape of the screen change? It doesn't and neither does the shape of the sail EXCEPT on the curved track traveler on my C30, which I replaced with a straight track.
So, now that you know what the traveler does, and to stimulate topic discussion, how do you use it effectively? If you were overpowered? Turning a mark or tacking?
.
For month and months in the early parts of last year, understandably, I never heard from a fellow sailor. Sail trim was the last thing on the minds of sailors but that's now changing as things get back to normal. Recently, I spoke to a FL sailor. He wanted to master the TRAVELER. Normally, I don't discuss one specific control because ALL the sail trim controls for the main and jib have to work together and be properly set for the wind speed and point of sail or the boat doesn't go anywhere but I was SO happy to talk to a sailor that I decided to discuss the traveler. When I was part of Catalina 30 crew that raced in their national regattas my responsibility was the traveler.
I first asked if he knew WHAT the traveler was adjusting - he didn't. In my opinion, if you want to know how any devise works you should first understand what's it's doing. The traveler adjusts the ANGLE OF ATTACK. He asked what's angle of attack? In this case I violated my rule and I told him he didn't need to know -- in simple terms it's the angle between the reference line (chord line) and the oncoming air flow. I hate scientific explanations but what you're doing with the traveler is "turning the wind" to offset a pressure differential on the sail. It's the FLOW/PRESSURE OF AIR. On the leeward side you have high speed flow/low pressure and on the windward low speed/high pressure. These force, which are also present on the rudder and keel, produce SUCTION which cause the boat to move forward. You INCREASE the angle of attack by moving the traveler toward the center of the boat. As you do that you're increasing power and lift/drag -- I don't want to get into lift/drag. The same thing happens when you move the jib fairleads inboard. The reverse is also true - to DECREASE power and lift ease the traveler away from the center line. With most boats you don't want to go past the center line but with the C30 going a bit beyond the center line gave me a bit more speed..
With most sail trim controls, when you adjust them the shape of the sail changes but not with the traveler. I've uses this example many times to describe the action of the traveler. Picture your screen door with a pin in the outside corner that rides in a groove in the floor. When you open and close your screen door does the shape of the screen change? It doesn't and neither does the shape of the sail EXCEPT on the curved track traveler on my C30, which I replaced with a straight track.
So, now that you know what the traveler does, and to stimulate topic discussion, how do you use it effectively? If you were overpowered? Turning a mark or tacking?
.