We are installing a Harken Windwrd Sheeting traveler 6::1 with end controls. The track is 1.5m and we would like to have a continuous traveller control line connecting both sides of the traveller. The line is 3/8" diameter. What would be the total suggested line length for the traveller control line? With Windward sheeting, how much free or working length?
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Traveller control line length
Take the mechanical advantage (6:1 in this case)plus 1 and multply by the traveller length (1.5m). Add to that twice the "tail" length. By tail length I mean the amount of line that you need to make pulling on the traveller easy. If you need to do it from the helm it might be 6+'. If you can get right up to the traveller then 3' is fine. You didn't indicate where the traveller is so you will have to figure this one out for yourself. I'll use 5' for the example. ((6+1)*1.5)+(2*5)= 10.5+10 = 20.5m of 3/8" line. Are you sure you have a 6:1 mechanical advantage? Most are 3:1 or 4:1. Count the number of times the line will pass between the traveller car and one of the traveller ends. That is your mechanical advantage.
Take the mechanical advantage (6:1 in this case)plus 1 and multply by the traveller length (1.5m). Add to that twice the "tail" length. By tail length I mean the amount of line that you need to make pulling on the traveller easy. If you need to do it from the helm it might be 6+'. If you can get right up to the traveller then 3' is fine. You didn't indicate where the traveller is so you will have to figure this one out for yourself. I'll use 5' for the example. ((6+1)*1.5)+(2*5)= 10.5+10 = 20.5m of 3/8" line. Are you sure you have a 6:1 mechanical advantage? Most are 3:1 or 4:1. Count the number of times the line will pass between the traveller car and one of the traveller ends. That is your mechanical advantage.
Weird and I mixed my units
Weird stuff in the formula I just posted. Also I mixed meters and feet. the formula is correct just need to convert to a common unit. sorry for the confusion.
Weird stuff in the formula I just posted. Also I mixed meters and feet. the formula is correct just need to convert to a common unit. sorry for the confusion.
6::1 Advantage
The Big Boat Windward sheeting traveller car can go 4::1 with one pair of blocks removed, 5::1 by attaching the control line to the one pair of blocks that would be removed to get 4::1 advantage, or 6::1 by attaching the the control line to the outside control block and using the block that would either be removed for 4::1 or tied off for the 5::1 advantages. The traveller is mounted just aft of the companionway (approx 1 ft) , forward of the wheel (approx 6 ft), and between the primary Genoa winches.
The Big Boat Windward sheeting traveller car can go 4::1 with one pair of blocks removed, 5::1 by attaching the control line to the one pair of blocks that would be removed to get 4::1 advantage, or 6::1 by attaching the the control line to the outside control block and using the block that would either be removed for 4::1 or tied off for the 5::1 advantages. The traveller is mounted just aft of the companionway (approx 1 ft) , forward of the wheel (approx 6 ft), and between the primary Genoa winches.
Yep, that's the rub.
I tried to order one for my boat. I have mid-boom sheeting. Windward sheeting travelers are end-of-boom only. *cry
I tried to order one for my boat. I have mid-boom sheeting. Windward sheeting travelers are end-of-boom only. *cry
End-of Boom only???
Fred, Why do you say Windward Sheeting travellers are for E-O-B only? I worked on the selection with a Harken employee and your statement confuses me.
Fred, Why do you say Windward Sheeting travellers are for E-O-B only? I worked on the selection with a Harken employee and your statement confuses me.
Hey Rick what not mock it up
with some light line or twine. Fred is just confused, because it was supposed to rain here today, and it turned out sunny and mild.
with some light line or twine. Fred is just confused, because it was supposed to rain here today, and it turned out sunny and mild.
Works fine with mid boom
Rick, We have a windward sheeting system on our Frers 33. The track is by the companionway, so mid boom, and works fine. To determine the length I would run a string through all the blocks on both sides. That way you can play with the length of the loop in the middle that you will actually handle. The continuous line will be shorter than 2 separate lines, but you do have to pull the entire length of line through all the blocks on both sides. Depending on the size of your main, you might need the 6:1 with mid boom sheeting. We really like the system on our boat.
Rick, We have a windward sheeting system on our Frers 33. The track is by the companionway, so mid boom, and works fine. To determine the length I would run a string through all the blocks on both sides. That way you can play with the length of the loop in the middle that you will actually handle. The continuous line will be shorter than 2 separate lines, but you do have to pull the entire length of line through all the blocks on both sides. Depending on the size of your main, you might need the 6:1 with mid boom sheeting. We really like the system on our boat.
Fred's comment
Traveler car sizes should be selected according to mainsail area and boom position. Mid-boom sheeting loads are much greater than end-boom. According to Harken specs on page 118 of their 2005 catalog the maximun mainsail size for mid-boom sheeting using the big boat windward sheeting cars is 450 SF. The mainsail area of Fred's is 557 SF. Too big for mid-boom and right at the limit for end-boom. Fred is right, again. In 1996 we took delivery of a H29.5 which the dealer had added a mid-boom Harken midrange windward sheeting system. It would jamb and was very difficult to use when the wind was above 10 or 12 knots. When I checked with Harken I was told it was way undersized. H29.5 mainsail is 406 SF and the midrange system is only good a for a maximum of 240 SF. It's still gathering dust in our garage.
Traveler car sizes should be selected according to mainsail area and boom position. Mid-boom sheeting loads are much greater than end-boom. According to Harken specs on page 118 of their 2005 catalog the maximun mainsail size for mid-boom sheeting using the big boat windward sheeting cars is 450 SF. The mainsail area of Fred's is 557 SF. Too big for mid-boom and right at the limit for end-boom. Fred is right, again. In 1996 we took delivery of a H29.5 which the dealer had added a mid-boom Harken midrange windward sheeting system. It would jamb and was very difficult to use when the wind was above 10 or 12 knots. When I checked with Harken I was told it was way undersized. H29.5 mainsail is 406 SF and the midrange system is only good a for a maximum of 240 SF. It's still gathering dust in our garage.
Winward Sheeting
The Windward Sheeting traveler is being installed on a Peterson 34. For people with the Windward Sheeting, what is you preference for continuous vs. separate control lines for the Port and Starboard?
The Windward Sheeting traveler is being installed on a Peterson 34. For people with the Windward Sheeting, what is you preference for continuous vs. separate control lines for the Port and Starboard?
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