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Designer

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Designer last won the day on February 22

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  • Birthday 01/01/1

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    Vandemere, NC

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  1. Designer

    Battens

    Beacher, Back in the day, all we had was wood for battens.They worked, and we had the advantage that we could plane them down to get the shape that we wanted. The down side was that they often broke and had to be replaced. I use glass battens exclusively now because they are permanent. The popular woods for battens were cane, oak and ash. You need wood with good bending properties. To make sure that I do not lose my leech battens I sew them in with a stitch across pocket opening at the leech. To remove the batten I snip the stitch and out they come. I use a sail makers needle with waxed sail makers thread. To fold the battened sail into a small stowable package I do what I call a leech fold. Instead of folding the sail perpendicular to the luff and flaking the sail parallel to the foot, I fold the sail perpendicular to the leech, flaking the sail parallel to the battens. This stacks the battens on top of each of each other so that you can fold the stack around the battens, the folded sail should then fit in the sail bag. On the CS17 and 20 mk3's we use a sausage bag with a zipper and flake the sail right into the bag and zip it up.
  2. Designer

    No Boom Bang

    Joe, That is it.
  3. Designer

    No Boom Bang

    Beth and I had the pleasure of Joe and Sally's company for a couple days at Mystic as well as Joes famous clam chowder for lunch. We discussed this problem in Joes mind about the boom being too low and now that I see the pictures I see the problem, there is no clew car! The bottom picture shows only an outhaul at the clew and about a 2-3" gap between the clew and the top of the boom. If the boom was lifted to the sail in that picture it would only gain him a couple of inches of boom height but there is no mainsheet tension. In a breeze with normal mainsheet tension there could easily be 6 - 10 inches of boom gap to the sail, not to mention that the lower third of the sail is setting like crap because the clew load coming from main sheet tension flattens the bottom of the sail regardless of the outhaul setting. The outhaul's job is only to haul the sail in and out, not to support boom. Obviously you do not need a real clew car for such a small rig. I use two wraps of 1/8" line tied around the boom and through the clew cringle so that it brings the boom close to the sail while allowing the clew to slide fore and aft along the boom for a few inches. I consider the clew line to be the most important line in the rig and it seems to be the most misunderstood.
  4. Designer

    AWL

    Oyster, That is a great picture. The babies look almost a big as the parents.
  5. Designer

    Capt Bones Core Sound 17 Mk 3 #14 Kit Build?

    Just to add a little more confusion. Captain Bones is building the CS17 mk3.2. We have totally redrawn the mk3 17 and 20. The lower hull shape has not changed and the bulkhead positions have not changed but there have been a lot of subtle changes in much of the rest of the boat. This is why they are freshly written instructions as we try to keep them as up to date as the plans. We continually try to optimise our boats and I will try to find the time to explain all of the changes in a new string.
  6. Designer

    AWL

    Amos, The Gulf Stream crossing was very easy. We sat at Bimini for a few days waiting for a norther to pass. By lunch time on the day before we expected to cross, the forecast said the wind had shifted east and the swell was dropping so we were underway by 1:00 pm. It turned out fine and we were anchored up in West Palm Beach before dark. Of course we were running at 10 knots and the stream gave us another 3 knots. We can cruise at an easy 15 knots but 10 suited the conditions. You cover a lot of ground at 13 knots. I pushed for turning up the axis of the stream and be home in a couple of days but the owner nixed it. In retrospect I enjoyed the trip up the waterway. Watches meant pushing the left or right buttons on the auto pilot every couple of minutes and watch the world go by. I never saw any conditions that Carlita could not handle easily. We just need a good weather window to make up for our lower speed.
  7. Designer

    AWL

    Chick, It seems like you know me too well.
  8. Designer

    AWL

    I have been absent without leave for about three weeks leaving Alan to fend for himself. He appears to have done such a good job I might have to sail more. The owner of the big power cat that we built, called me and asked if I would like to help him bring her back home from the Exumas. It too several nanoseconds to say yes. His intended crew had injured himself and had to return home. I was able to delay my departure to see the first two days of the Family Island Regatta at Georgetown. It is the biggest sporting event in the Bahamas. The Prime Minister and Governor General among other notable dignitaries attend the awards ceremony. I never did find out what the design rules were but the theme was to install the tallest mast that they could get away with and if you want more sail area just make the boom longer and add foot round until it drags in the water. I understand that they now have to return with all of the crew that they left with but they appear to adjust the number of crew for each race to the expected wind strength. The fleets were big and I think that there were four classes. I do not think that #5 would pass the Coast Guard level flotation rules. I was pleased to see that the Osprey's were doing well. There were not that many in Florida or Georgia but the Carolinas had lots of nests with chicks looking like they were almost ready to fledge.
  9. Designer

    Just want to say thanks

    Hi David, Thanks, I always appreciate the compliment and that the boat works for the way that you use it. People are always asking me "which design is my favorite". I usually answer "all of them". I get to recall all the effort, compromise and development that went into each design and the modifications and improvements that have been made along the way. Marissa is up there as one of my best. After designing and going through the prototyping of the Ocracoke 20 I thought that a lot more people would like a smaller cheaper, simpler and quicker build that would be very economical to run. It turned out that I was totally wrong. There have been quite a few built but the Ocracoke 20 sells better. I built the prototype to prove that the our new chine flat construction method worked and that she would perform as calculated. The chine flat method worked so well that I redesigned all of the Ocracoke and OB series to incorporated it. As for performance, I used Savitsky's method with the Blount modifier for the performance curve. In reality she turned out better at the top end and worse in the hump. As nobody should run in the hump range (9 - 14 knots) it turned out well. It is just a curiosity as blount was added to improve hump speed calculations. I recently sold my Marissa, much to the dismay of my granddaughter (her namesake) because I don't have enough space for any new boats. The good news is that she has only moved next door and I get to see her whenever I want and get to ride on her occasionally.
  10. Designer

    Ocracoke 20 in OZ

    Len, That Z shape is norml. If the chine flat was horizontal, the WL would be perpendicular to the CL or kicked forward if the flats were angled up instead of down. Just tape to your laser line.
  11. Designer

    Call for a BandByachts ice boat design

    Hey Beacher, I do not know anything about iceboats. I understand that the people who live in the frozen north get so bored in the winter that they become brave enough to face the cold and go sailing. Where I come from, ice is put to the more serious task of cooling drinks. Is it a boat if it does not float? Just kidding, but seriously I do not know anything about iceboats. I think that it would be had to beat a DN.
  12. Designer

    Trailer for Core Sound Mark 3 boats.

    What Ken is talking about is what I call the winch pylon.
  13. Designer

    Trailer for Core Sound Mark 3 boats.

    Steve, This is a good idea to keep the trailer talk in one place. As has been discussed, dealers are used to big heavy boats with a big outboard on the transom. This trailer will cost more, add a heavier load on the tow vehicle and result in lower gas mileage and give the boat a harsher ride not to mention being a lot harder to man handle. My trailer has been under many boats. It was originally built for a 20' cat which meant that it had to have a narrow wheel base to fit inside the hulls. The advantages are maneuvering is tight spaces is great and the trailer is long and supporting more of the boat. The main disadvantage is that the boat is high for climbing on board. I used to have 13" wheels but found that 12" rims fit on the same hubs. This does not seem like a lot but the tire thickness reduction as well as the smaller rim lowered the boat about 3". Carlita was towed 13 -14 k miles last year without any wheel or bearing issues. I prefer to not put the bearings and electrics in the water. This means that the boat needs to roll off the trailer easily. To achieve this, you need lots of smooth running rollers down the keel line. I watched Joe launch his EC22 at the messabout and she rolled off perfectly. At least 5 sets of keel rollers. This is also kinder to the boat. The next consideration is the bunks. They need to be set at the lowest point of the hull which is about midships on our boats at their transverse position. This is not always easy on powerboat trailers as they are usually set too far aft. If the bunks are not at of the lowest part of the hull, they will lift the keel off of the rollers causing lots of friction as the boat rolls aft. The transverse position for the bunks is not that critical in the mk3's as there is plenty of structure above the bunks. I would just locate them above the trailer frame. I like all of the boat to be carried on the keel follers and use the bunks just to stop the boat from tipping. I do not think that roller bunks are necessary on a boat this light but I am going to switch my carpet to starboard. I think that properly set up you do not need a tilt trailer.
  14. Designer

    Chick's Micro Power Cruiser Project.

    Whoa Chick. Has that cold mountain air gotten to you! If I did not know you better I would be wondering if you have gotten a little close to some of that moonshine.
  15. Fred, I will work on it. I am also updating the dodger plans for you. I have been working on being able to produce the adapter swivel at an affordable price. I am planning on being able to CNC cut the swivel body from UHMW plastic. I have built a cutter for machining the races and will make up a new swivel and give it a good testing.
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