Andrew Bish
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I NEVER leave my halyards on the boat when its being stored. At the cost of replacement I prefer they last 4 years rather than 2. For the backstay I would use the Vectran WITH a cover. Btw, I “sky” my main halyard since I use a 2:1 purchase and that last few inches up there does get some UV exposure. My last main halyard lasted 3 years. Not bad! Also, has anyone calculated how much weight would be saved with a composite backstay? I figured roughly a 4lb weight saving over my rod backstay. I figure with my racing record I have to decide weather its feasable to squeeze a little weight savings along the whole backstay is worth the extra effort. In the overall scheme of things untill one is in the top three of their class its a futile effort but on the other hand the psychological advantage is priceless…..
I dont understand why all this discussion of different line. Amsteel, Robline,etc….
There are 3 basic types of line I have found that are universal to all manufacturers. Dyneema, Technora and Vectran. All three of these are the same from ANY manufacturer. Vectran is the ONLY line that has no creep. ALL lines stretch based upon their percentage of load vs breaking strength called “tensil strength”. The best way to make a comparison is to compare all three composites of the same size, say 1/4″ and given a specific length of a halyard say the jib(40′) and do a spread sheet to see the amount of stretch and what their load capacity is based upon a given load from their table. You will find Vectran has the highest strength, least weight and NO CREEP! I personally use Vectran for my main and jib and Dyneema for my wing halyards. I use the dyneema because it has a bit of shock absorbing charachteristic to it and stretch is not as much of a concern where with the main and jib zero stretch is crucial. Sutdy it for yourself and see…There’s my 2 cents worth!!!
Bruce,
Your theory is correct but flawed. The purpose of the BOD is to keep the hull from shrugging by acting as a spreader. Yes if you hold the deck down it will attempt to keep the hull from shrugging but its not very stiff. Think of the BOD as a spreader and the jock straps as shrouds all below the deck. By using these you isolate the stresses from the hull. The only weak point in the system is the sheer load on the chain plate bolts which tend to pass through the bulkhead at an angle. What helps here is a backing plate on the front side of the bulkhead opposing the chainplates. I used G-10 material.
Ballanger sels a real nice jock strap setup that looks as good as it is functional. The BOD can be something as elaborate as the curved spreader like I have from David Wilby, expensive but effective. It can also be as simple as a piece of 2″ aluminum angle. With that you lose a lot of headroom making it difficult to access the forepeak area if your a larger person.
In conclusion, using the BOD / jock strap system you greatly reduce the stress on the hull and bulkheads and it allows you to get more tension on your shrouds since the whole rig becomes stiffer. Without this as you tension your rig it has a spongy behavior and everything is flexing.Dari,
Call me!Andrew
310-925-9386Al,
I’d be interested to know how much you want for a new rudder head?Also What I have discovered is wear in the bearing surface areas. I even considered replacing my whole rudder. There must be a good method to resurface the bearing areas and still keep them true. Any ideas?
Buzz Ballenger sells them and he is in your back yard….
No the problem is still there. I have tried to place an ad 4 times. Why cant this thing work? I’m very frustrated…..
There is a Quantum rep here in Southern California. Quantum sails are used exclusively on Blue Star who wins every regatta so my objective is to get the same sail Blue Star has. We discussed with him during the 2011 Olson 30 Nationals a “group buy” to help with the cost. To make it worth doing we will need at least 4 or 5 people in need of the same sail. I’m in need of a new main. So lets come up with a list of people SERIOUSLY interested in joining me with this effort.
Ichiban is considering a new main. If anyone is interested in a Quantum main as a group buy let me know.
Ichiban is 24-7/8″
