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Designer

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Designer last won the day on January 15

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  • Birthday January 1

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    Vandemere, NC
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    06/17/2019

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  1. I checked the plans and the cockpit only slopes .8 of one degree. I trimmed the bow down from the stern WL .85 degree which gives you a bow down trim of 3" and a displacement of 2714#. It should take around 800 foot pounds to bring it to trim. Of course this is very rough as we do not have exact trim measurements. When I look at where the water meet the chine the boat shows it further forward than the trimmed down drawing. The boat could also be heeling slightly to the camera.
  2. Aleksandr, You can do whatever you like in the bow section. It is only the aft section that is compromised because it has to have room to take the bow. I have built the standard side seat flotation tanks in the bow.
  3. I have stated this many times that I prefer to leave my lockers unpainted. I like the look of the natural color and enjoy it when I open them. If there if any deterioration going on with the wood I will see it immediately rather than being masked by the paint, not to mention that it is one less job to do. I have never noticed that it is too dark to find my stuff. This is a subject where there are no right or wrong answers.
  4. The cockpit sole is pitched aft 1 degree. That means that you are trimmed down by the bow a fraction over 1 degree.
  5. Emvrin, Congratulations!!! You outdid yourself this time. You put the rest of us to shame with the quality of your work. She looks beautiful. You do need a larger prop with 6300 rpm at wot. Have you weighed the boat? Because the keel is straight and level as designed, if you can put a mark on the bow and maybe on the forward edge of the leg at the water line next time that you are in the water. You can measure down to a keel line extension back on land and we can calculate her weight and trim.
  6. Hi Cracked Ribs. There is absolutely no reason why you could not build an aluminum Marissa. It will be heavier, the CS17 built in Alaska finished out at 700# which is at least 50% heavier than a wood version. Aluminum size for size is about 6 times heavier than okume ply. As you suggest 1/8" is a good starting point, it will be about twice as heavy as 9mm okume ply. That is aluminum's finished weight for the shell whereas the ply has to be glassed, coated with epoxy and painted plus the fact that the framing can be less. Which will probably come out about 50% heavier than the bare Marissa hull but you are talking about a very light boat. An all welded aluminum boat is about as tough and as maintenance free as it gets. You are right, the Pacific North West is aluminum boat country, it seems that work boats are not built from anything else except for maybe tugs where weight is probably positive. CS17 hull #1 was built in aluminum in New Mexico, I got to sail her in Florida and she performed quite well. About a decade or so ago I was hired to take a 50 footer from California to Puerto Vallata in Mexico. One of the incentives for taking the job was that hull #1 was residing a short drive north of PV. I had a great visit with the builder who is one of my favorite people and hull #1 was living on the beach along with the local Panga's. The owner was still enjoying her, saying that she was the best fishing machine he had ever owned, he would trim her for a beam reach to sail herself and was totally stealthy as he trolled to and fro for game fish. He laughed that he usually outfished the charter boats burning hundreds of gallons of fuel a day. She had not spent a day of her life under shelter and I will bet that she is still going strong. The second CS17 built in aluminum was in Alaska,. Here is one of his posts on this forum. You can search for the rest of his build. He said that 6065 was marine grade aluminum which is incorrect. The 5000 series is the marine grade. 5083 is a popular but not the only choice. styge Advanced Member Members 0 48 posts Location: Juneau, Alaska Report post Posted February 19, 2007 The weight of the boat is around 700lbs. So you won't be dragging it up any sandy beaches, but it doesn't sound like that will be a problem. As for building one, it may be easier to get a guy who's been welding, (and in particular, welding boats) for a while. I thought about doing the welding myself, but I figured my finished project should probably not be my practice piece, that gets expensive. It was all I could do to keeps up with my guy. I was cutting and grinding and he was welding, welding, welding! But it turned out great. If you decide to proceed with it, online metal in seattle is great for souring the aluminum, and they were happy to deliver it to Alaska Marine Lines to get barged up here. I went with 6065, I think, its a good marine grand and is a little more pliable (which isn't saying much) than other better grade. I have originally thought I would just do the hull and fit out everything inside in wood, but once the project was underway and we had a flow to the build process, it just seemed (at the time) to make sense carrying on in alumnium. The panels were coming together at a rapid rate, and I'm not the patient type, plus every additional panel meant less maintenance. Right now the only wood to be found on the boat is the tiller! Anyway let me know if you decide to proceed as there are a few things I would have done differently were I to do another one. Regards Styge Smith Juneau, AK
  7. Reacher, I designed the Walkabout back on the 80's. She is 22' long and is multi chine stitch and glue plywood. She was sloop rigged and has a lifting keel. There was only one boat built. Randy recently asked us to convert her to a cat ketch. We had one sail with the new rig. A few things were cobbled together to test how it worked out. We were well pleased with the change and have now made everything permanent and she is about ready to sail again. Why did we change rigs? Mostly convenience, the sloop rig was difficult to rig with the mast so tall and heavy. We had her rigged as mechanically convenient as we could but it was still a bear. The mast that we had was too heavy and made the boat a little tender, so one thought was to just fit a lighter mast. Randy has spent a lot of time in cat ketches and said "rather than just change out the mast, lets change the rig". She sailed well as a sloop and was nicely balanced, she won her first race. The lifting keel weighs 300# and has a 6 part purchase in the trunk that leads to a Harken winch near the cockpit forward. The two new masts are very quick and easy to raise and lower and stay permanently in their tabernacles, cutting down the rigging time substantially. I am looking forward to testing her out with everything properly finished. It is not very often that you get to sail the same boat with different rigs.
  8. It is shaping up to be great Messabout. A lot of boats have already arrived.
  9. Mathew, This is a problem which I do not understand. Growing up down under I could get all of the 6061-T6 that I wanted. Surely they still have need of a higher strength aluminium since they went metric. You do not mention the temper, T4- T6. The internet says that 6060 has similar yield strength to 6063 which is 2400 psi versus 40000 psi for 6061. Let us know what sizes that you can get, around the sizes that we specify and we will see if we can find a work around for you.
  10. I am disappointed too. I was looking forward to seeing you in a couple of days as well as getting to see Skeena. There will be more Messabout's. You have to take care of business.
  11. Oops! Yes that is definitely a typo. All the wall thickness for your mast sections are .065". I searched the plan files and found the error. The period ended up on the wrong side of the zero. I will correct it today. .065" is 16 gauge and is slightly thicker than 1/16" which is .0625". If you are building over in metric land, you might have trouble finding those sections. If your standard sections do not match the above corrected, find the nearest sizes and we will check that they meed the required specs. Make sure that it meets the 6061 T6 properties.
  12. Yes, it is on the B&B Facebook page. It is the last weekend in October.
  13. This is all good stuff and being forewarned is forearmed but I do not think that we need to get hysterical. I have capsized probably more than anyone here so you could say that I know something about the subject. If I was venturing far afield alone on a mk1 I would definitely have a mast float. I never capsized a 17 or 20 that was not a test even though I have had them in pretty bad weather. On a mk 3 it is still a good idea. I have singled handed Carlita a lot and been in some scary weather and never felt insecure. I have sailed her upwind with ballast, deliberately overpowered to see what she will do. As the boat heels over, the wind force is reduced but the righting moment is increasing all the way to about 60 degrees where it starts reducing. 60 degrees is huge and it would be a foolish skipper that did not reef long before. Typically it is hard to get her to heel much past 40 degrees while on the wind. On an open boat the down flooding angle is reached by 35 to 40 degrees which is easy to achieve as they do not have ballast. The exact downflooding angle depends on beam and freeboard and inherent stability but once you reach it is over. Down wind is the wildcard because dynamics play a larger factor. Any racing skipper knows, in heavy weather the gybe mark is where most boats capsize. This is because inexperienced skippers bring the helm up quickly to gybe and just when centrifugal force is heeling the boat to the max, over comes the sails adding to the heeling force and suddenly you have reached the down flooding angle and over you go. The smart skipper gybes before the mark by sailing slightly by the lee and holding a straight course, waiting for the gust to pass and pulls the sails over one at a time. He can now approach the mark with full concentration and easily dodge capsized boats and do a tactical rounding of the mark with the sails properly trimmed with no drama. For a cruising boat the downwind lesson is, reef early, reducing sail reduces wind force and lowers the heeling arm. Avoid gybing in high winds. If you have to gybe , do it carefully as described above. Avoid running dead downwind if you can. If you must, let you sails go forward of the beam by about 15 degrees which reduces the dreaded deathroll and makes it hard to accidentally gybe. Sailing in large waves also adds to the dynamics. Follow the paragraph above but reef sooner. Remember you are sailing one of the safest boats around but common sense is still required.
  14. We just got power back on about half an hour ago. We had no real damage and have almost got everything cleaned up. I am sorry to hear about Steve's oysters but glad that he and boat are okay. I hear that highway 12, the only road down the Outer Banks suffered some damage. Speaking of oysters, how did you fare Oyster?
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