catamaran eco6

 ECO 6

The ECO 6 is clearly an enlarged version of our well known ECOnomy cruiser. The ECOnomy cruiser is 5.5m long with a beam of 2.5m.

One of my clients in Brazil, who by the way has made these beautiful renderings of the boat, wanted to use the Gunter rig and bigger ECO. By looking at the possibilities new ideas could be realized - bigger cockpit (for dimensions see lay out). The big surprise came as I could find a space for a separate toilet room. A bit unusual for such a small cat but the fairer sex will appreciate it.

The jib stay is connected to a bridle, the compression load is handled by the front beam which is made from a readily available aluminium tube. The trampoline is also attached to the front beam. Handling the anchor etc can be done from here, low and safe.

The front seats are a good place to be when underway in warm climates. Good ventilation is ensured by a big front hatch and forward opening windows in the front seat area.

Another addition are the seat extensions. Their function is twofold, first to enhance stability and if folded up the they are back rests. Other small differences: I moved the rudder link to the back of the rudder housing. In this way the main sheet can travel freely on its rail.

The Gunter rig is more or less the same as for my KD 650 . The main sail is now attached to a boom. Again drawings show not only how to build the Gunter rig but also the boom. The jib is self tending.

SPECIFICATIONS

L.O.A. 6.00 m Beam 2.84 m Beam c/c 2.24 m Draught hull/board 0.22/1.00m Weight 360 kg Weight max. CWL 750 kg Main 14.6 m2 Jib 4.6 m2

Speed and stability

A bit more about this issue. Stability on a small family cruising boat is paramount. I was happy that the regulations in Brazil permit a trailing width of 2.85m and I was designing for this maximum. The result is not bad. See dynamic stability below:

Construction is like all my boats the time proven (ply)wood/glass, Epoxy composite system. Easy to build also by a first time boat builder. Time to build the boat and rig will be around 600 hours.

The plans for the boat consists of 33 drawings. All technical drawings are to scale 1 : 1. The DXF files can be used for CNC cutting. But the simple shapes of for instance the bulkheads are not worth the trouble. The description outlines the construction of the boat and gives a detailed description with pictures of how to build the hollow rudders and the daggerboard in a relative easy way.

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Multihull Structure Thoughts

Discussion in ' Multihulls ' started by oldmulti , May 27, 2019 .

oldmulti Senior Member

The following Bernd Kohler designs are close sisters. The Eco 5.5 came first then people asked for a slightly larger version (every designer gets asked could I just lengthen/shorten this a little). So Bernd designed the Eco 6 which uses mainly the same materials in a slightly longer and wider boat. The Eco 5.5 is a bridge deck cat 18 x 8.2 foot weighing 650 lbs and displaces 1390 lbs. The sail area is 200 square foot. The Eco 6 is a bridge deck cat 19.7 x 9.3 foot weighing 800 lbs and displaces 1700 lbs. The sail area is 225 square foot and can have a Code 1 of 190 square foot. The Eco 5.5 and 6 are an example of designs that for practicality, use stronger material than required in a smaller boat. 6 mm plywood can be used on a 33 foot boat. 12 mm ply underwings have been used on 37 foot catamarans that displace 7000 lbs. Result both boats can use the same materials. So what is the structure. The hulls are 6 mm ply, bulkheads 6 mm ply, stringers 20 x 25 mm, chines 25 x 35 mm. The underwing is 12 mm ply, the mast bulkhead is 12 mm plywood with timber strips top and bottom. The forward underwing and cabin roof 2 x 4mm ply and the cabin roof has external stringers. The following web site provides details of rudder and daggerboard construction I mentioned in an earlier post. How to Build Rudders or Dagger Boards | Small Trimarans http://smalltrimarans.com/blog/how-to-build-rudders-or-dagger-boards/ The Eco 5.5 plans show two rigs. A normal sloop rig and a single halyard Gunter rig. For owners who trailer the boat the short mast of the Gunter rig will be appreciated. A well designed Gunter rig with Bernds improvements is as fast g to windward as good sloop rig. The rotating aluminium mast is made from a 80mm diameter tube. The rig/mast on Eco 6 is slightly larger. The following web address gives the Eco 5.5 list of materials. ECOpage3, pocket cruiser catamaran for the DIY boat builder http://www.ikarus342000.com/ECOpage3.htm  

Attached Files:

Eco 6 side g.jpg, eco 6 copy z.jpg, eco 55 build 2.jpg, eco 55 frames d.jpg, eco 55 inter build.jpg, eco 55 cockpit s.jpg, eco 6 cutaway.jpg, eco 6 frames a.jpg, eco 6 planking s.jpg, eco 6 build usa.jpeg, eco 6 build 8.jpg, eco 6 build 9.jpg, eco 6 bow view.jpg, eco 6 centre board..jpg, eco 6 underwing.jpg.

Some additional Eco 5.5 and 6 jpegs  

ECO 55 rigsoftA.jpg

Eco 55 top_04.gif, eco 55 sail.jpg, eco 55 trailer.jpg, eco 55 interior a.jpg, eco6florida_01.jpg, eco 6 main cab h.jpg, eco 6 build l.jpg, eco 6 cab top.jpg, eco 6 fwd wing frame.jpg, eco 6 frame setup h.jpg, eco 6 build g.jpg.

Fifty Fifty is a 50 foot extreme racing 50 x 30 foot cat. It displaces 3400 lbs and carries 2 x 62 foot wing masts with interconnected rigging. The masts are 110 square foot each with a 775 square foot main on each mast. There are 2 x 500 square foot jibs or 2 x 775 square foot genoa’s. The total sail area with masts and jibs set is 2770 square foot of sail. Power to weight is of the chart. Building the boat was done at Pauger Carbon Composite, 50 km from Budapest. The aim was to compete in the 44th Kékszalag 2012 Grand Prix, the Blue Ribbon on Lake Balaton, Hungary's most important regatta. This regatta has a strong entry with over the 600 boats competing. Unusually multihulls are only allowed to compete in the event every other year, 2012 only being the second time they have been allowed in. The winds were light averaging under 10 knots but the two masted catamaran proved her potential regularly sailing up to 3 times faster than wind speed (peaking at 24 knots) despite the team only being able to sail her for three hours prior to the race. Their winning time of 10 hours, 34 minutes and 15 seconds was a new course record. The boat was built with carbon fibre infused high temp epoxy resin with and an Airex T92 foam core that has very low resin take up. The hulls were post cured. At 3400 lbs displacement there was some very good engineering here especially with the weight of two 62 foot masts etc. PS It only takes 7 to 8 crew to control the boat and rigs while racing. This boat was a precursor to a 35 foot biplane rig cat that was built to race in Switzerland lake races.  

fifty_fifty_38_620.jpg

Fifty fifty full sail.jpg, fifty_fifty_02.jpg, fifty_fifty_03.jpg, fifty_fifty_on_board.jpg, pauger35-biplane cat.jpg.

bajansailor Marine Surveyor

I am just wondering how much slower she would be if she only had one rig? Although if it was one rig on one hull, then I guess she would have a preferential tack for sailing on like a proa (?) And if the rig was on the centreline then they would need a huge amount of extra structure (hence weight and cost) to support the compression forces on the mid-span of the bridge deck.  

bajansailor. I suspect one rig that was higher would be faster and it would be lighter. The larger one rig may carry less sail but it would be more efficient especially reaching and upwind. And very fast cats that can exceed wind speed basically are going upwind even on a broad reach. The weight saved in the rig can be used to strengthen the main mast supporting beam which will probably need a dolphin striker to support the compression loads. The additional weight will be more in the dolphin striker than extra layers in the main beam. Also some form of compression beam will be required in the bow or a central spine forward to mount the jib on. All possible and I suspect would be a faster boat for less overall cost.  

The final Bernd Kohler design for now is the Eco 7.5. It is a bridgedeck cruising catamaran that filled the slot between the ECO 6 and KD 860. The cat is 24.5 x 14.75 foot and weighs 1650 lbs it displaces 3100 lbs. It carries 305 square foot of sail in a sloop rig. There is a Gunter rig option for those who have to pass under low bridges etc. The hulls L:B is 9:1, in short a reasonable cruiser. Its build specifications are similar to the Eco 5.5/6 but with some mild upgrades. EG The planking for the chine hulls has a constant radius and is tortured plywood in some spots. The hulls are 6 mm plywood and have biaxial glass 340 gr/m2 and one layer 200 gr/m2 glass fabric. The roof is 2 layers of 4 mm ply and forward under wing is likely to be 3 layers of 4 mm ply. The under wing is 12 mm ply. The attached sample PDF plan gives more details of the structure. Many copies of this cat have been built globally and owner reports I have read indicate it is a good boat that sails well and is capable of coastal passages. When you look at some of the build photo’s please remember the boat has a reverse bow and the hulls are built upside down.  

Eco 7.5 side a.jpg

Eco 75 sailing w.jpg, eco 7.5 hull build d.jpg, eco 7.5 cross 2.jpg, eco 75 bow build.jpg, eco 75 galley build.jpg, eco 75 main cab build.jpg, eco 75 cnstruct 5.jpg, eco 7.5 x ray.jpg, eco 7.5 side x ray.png, eco 7.5 saloon2.jpg, eco 7.5 top s.jpg, eco 7.5 galley 2.jpg.

eco pwr 7.5 drawing.PDF

Wingmasts have been around for years and are on a lot of high performance boats from small cats to fast cruiser EG Eagle 53 cat mentioned earlier. But the evolution is still going on with EG Beneteau has developed a reefable wingsail for their cruiser racers. The market is still not ready for the concept but Beneteau is not hiding the fact they can sell it. But one of the most interesting developments is the inflatable wingsail. This wingsail depends on air pressure to hold its shape and appears, according to tests, to function well as a sail. But the real trick is it is reefable. The sail has effectively 3 separate air chambers, combined with a mast that has 3 sections in it and the mast can expand or contract according to the what portion of the sail that is pressurized. Each air chamber has its own valve which can be controlled from deck level. There is an air pump which runs continuously to pressurize the sail. The air pressures in the sail are low. The whole rig is relatively light and can withstand a small hole in an air chamber and still operate. Why is this interesting? Think about a multihull “capsizing”. With a large inflatable wing sail which is in effect a giant flotation device that will not let you capsize beyond 90 degrees (assuming the mast is strong enough). You have a lot better chance of righting a boat from 90 degrees than fully inverted. You get a win win, a wingsail and an anti capsize device in one.  

benatau wingsail 1.jpg

Benteux wing-sail-reef.jpg, inflatable wing mast 1.jpg, inflatable wing mast overview.jpg, inflated-wingsail-yacht-running.jpg, inflatable wing deflated 2.jpeg.

Whilst we are talking about wingsails here are a few more items to contemplate. Professional Boat Builder magazine issue 14 page 11 has information on wing spars including Gold Coasts 53 foot charter cat spars. Professional BoatBuilder - 14 - Dec-Jan 1992 https://pbbackissues.advanced-pub.com/?issueID=14&pageID=11 Wingmasts were also discussed on page 5 of this thread with plans for Stressform wing masts. The additional information is in jpeg one which is how land yachts build their wing masts that carry 100 square foot of sail at speeds up to 140 kilometers per hour (80 MPH). Basically a blue Styrofoam core with a 3 mm plywood web with 12 mm aluminium rods at either side. The whole thing is wrapped in 2 layers of 200 gsm cloth. These masts take a lot of abuse and at 80 mph at lot of pressure. The next 2 jpegs are of large “wing” masts designed by Eric Spondberg. The first is a carbon fibre version and the second is a timber version. The timber wing mast version is for a 110 foot (yes 110) steel charter boat. The final jpeg is of a 40 foot cat that had 2 freestanding wing masts. The boat scared the owner in its first few sails and he cut 12 feet of the top of each mast. The boat then sailed 2000 miles up the Australian coast before being put up for sale. Rob Denny built the carbon fibre masts to the owner’s requirements.  

Foam glass wing mast 1.jpg

Sponberg wingmast construction.jpg, sponberg wood wing mast large.jpg, biplane wing mast cat.jpg.

The final one on masts for a while, the diagram below is an interesting comparison of wooden masts. I understand most people who read this are likely to have aluminium or something more exotic for their rig but this diagram conveys a lot of information. A. a solid mast is heavy for its stiffness/compression. B. the thinner the wall the larger the diameter required to maintain the same stiffness/compression. C. different shapes can have an influence on weight and stiffness/compression. D. a plywood sided mast can be lightest weight but it has one of the largest cross sectional area. The table down the bottom on round masts is also informative. As the wall thickness is decreased to reduce weight of the cross sectional area the mast diameter must increase to maintain the same stiffness/compression capability. Like all things in yachting masts are a compromise based upon the design needs. With mast design leave it to the professionals unless you have a big budget or a small boat where you can use a known quantity like a beach cat rig. The original source for the diagram came from Hollow Masts for Small Sailboats https://www.pdracer.com/mast/hollow-mast/ if you need a clearer image.  

Mast comparison wood s.png

C class cats have always been on the leading edge of design. The basic design is 25 x 14 foot with 300 square foot of sail. The weight of the boats vary. The old all timber boats were 550 lbs the modern nomex carbon fibre boats are under 400 lbs. The hulls are much lighter in modern C class cats but the rigs are a lot more complex full wings which are heavier than the aluminium mast, light Dacron sail cloth, old C class versions. Lady Helmsman an early C class hulls were 2 layers of 2.5 mm ply diagional reinforced with 3 mm ply around the daggercase area and a 150 mm wide glass bandage around the hull at cross beam attachment points. A 21 x 19 mm stringer at turn of bilge. Three 50 mm Styrofoam frames at 900 mm centreline in the bows. The deck is 4.5 mm supported by 6 mm ply deck beams. The fore and aft beams are M. 160 with the main beam having a 400 mm deep dolphin striker with 7.5 mm wire. The next generation came about the time of Miss Nylex which was the first full solid wingsail and composite hull C class. The boat was 500 lbs and had a 6 mm balsa sandwich hull with 330 gsm of glass on either side. It still had aluminium beams. The next generation started in the early 90’s with foam carbon fibre hulls, carbon fibre cross beams and very sophisticated multi element wings. These boats started to become lighter (under 500lbs) but the wing weight was increasing due to the multi elements. These hulls are PVC foam with epoxy glass of 270 gsm Carbon Fibre. In the late 90s the design of C class were becoming very refined with EG Cognito not only being very well designed but had significant developmental testing done as they refined the building process. We are talking female moulds, Nomex cores, carbon fibre skins and crossbeams. The aerodynamics of the hulls was also being designed in. The rigs are really advanced with fewer elements but having more flexibility allowing greater control across the wind range. The following article in Professional Boat builder issue 39 page 30 gives details. Professional BoatBuilder - 39 - Feb-Mar 1996 https://pbbackissues.advanced-pub.com/?issueID=39&pageID=33 Cognito took 4500 hours to build and many hours to develop to its full potential. The next generation was experimented with about 2006 but was not fully developed until about 2013. The foiling C class cat. These C class cats required a rethink. The hull structure had to be reinforced around the dagger/foil case as it now has to support 70% plus of the boat weight. The bows are becoming finer with narrower decks to pierce through waves not ride over waves. The transom structures need to be reinforced to handle the some very high load and control forces. The aerodynamics of the hole structure is now considered as the entire boat is often 2 feet in the air. The hulls are less than 200 gsm carbon fibre on either foam or nomex with fully integrated crossbeams and almost all fittings are carbon fibre structures. These boats are approaching 350 lbs of weight. These boats need very good sailors to control them. Even student groups are trying to develop C class cats eg. Rafale II carbon/epoxy C-Class hydrofoil catamaran http://www.jeccomposites.com/knowledge/international-composites-news/rafale-ii-carbonepoxy-c-class-hydrofoil-catamaran The cut away diagram is of that boat. Finally there is a PDF written by Steve Killing about the transition development of C class cats in 2007. The non foil boats were ending and the foil cats were being developed. This I one story of that transition.  

Old C class d.jpg

Lady helmsman c class.jpg, niss nylex c class g.jpg, old c class wing x.jpg, evolution c class s.png, foiling c class 1.jpg, modern foil c class.jpg, cf_epoxy_hull_design_jpeg.jpg.

C class development SteveKilling F (1).pdf

Famed sailboat aerodynamics researcher C. A. Marchaj published this startling graph in his research paper Planform Effect of a Number of Rigs on Sail Power . Most startling is the extraordinary performance of the crab claw sail, which demonstrates its superiority to a Bermuda mainsail right from the close-hauled condition. Its superiority increases when the boat bears away, and on reaching, with the heading angle 90 degrees, the driving force coefficient of the crab claw is about 1.7, whereas that of the Bermuda rig is about 0.9. That is, the crab claw rig delivers about 90% more driving power than the Bermuda rig. ~ Sail Performance Marchaj theorized that the crab claw develops lift in a different way than the standard Western Bermudan. It operates in what is called *vortex lift* mode, which creates powerful spinning tornadoes of air off the leading edge. The spinning vortexes are zones of intense low pressure, and thus lift is created. If you wish to learn more, Marchaj’ book Sail Performance (Adlard Coles Nautical 1996) is highly recommended. His tests showed that the crab claw was not the only traditional rig that could outperform the Bermudan on some courses. A lateen was superior to windward, and the gunter, sprit, and lugsail were all superior overall to the Bermudan. The Bermudan with a small jib tested very well close-hauled, second only to a lateen in Lift to Drag (L/D) ratio. The modern sport of yacht racing has developed around the triangular race course which favours windward sailing efficiency. The Bermudan tested very poorly on off wind courses however. It has also been pointed out that very fast sailboats, such as racing multihulls or ice boats, create so much apparent wind that they are always sailing close-hauled, and therefore, it’s the L/D ratio that really counts, not the max Lift Coefficient. Further tests were done in the attached PDF which compared various pacific island rig types for the best performance. Again the crab claw was best. The jpegs are a subset of the information. A summary from the authors is as follows “To understand the sailing performance of traditional canoes in Oceania, we replicated ten sail rigs and tested them in a wind tunnel. Measurements of lift and drag forces demonstrate substantial differences in their performance. At low heading angles, from about 30° to 80° off the wind, three sails ( Massim , Ninigo , Santa Cruz ) are remarkable for their higher efficiency. Three other sails ( Tonga , Hawaii , Tahiti ) are remarkable for their lower efficiency from heading angles of about 90 to 130°. In between, four more sails ( Arawe , Micronesia , Vanuatu , Marquesas ) have roughly similar performance to each other. The ranking of these sails is followed by a description of their distribution with inferences on historical evolution of canoe rigs.”  

Machaj crab claw vs burmudian main.png

Pacific island crabclaw-tests.png, pacific island sails tested.png, pacific island results diagram..png, crabclaw sail.jpg.

Pacific rig analysis of performance.pdf

Vaka 990 Proa is a 32.5 x 18 foot cruising proa with float accommodation or if the proa is a sports version the float has water ballast. Its displacement is 1900 lbs carrying 400 square foot of sail. The boat is constructed of west epoxy plywood construction. The bulkheads and main hull are 9 mm ply with floats 6 mm ply. (36 sheets 2.0 X 1.25 mtr 9 mm. 16 sheets 2,5 x 1.25 6mm). The "Pod" is habitable and acts as an anti-capsize device and the boat has 4/2 berths, a WC, limited galley with storage. The jpegs give an idea of the Vaka 990 Proa. The PDF is a detailed study plan of the boat and its structural components. The second proa is a racer cruiser designed for the race to Alaska. This is aimed at performance plus. Page 14 of this thread has study prints of the proa Madness which is the same size. Each should be capable of sailing very well for good sailors. These boats are not set and forget boats, they need a constant watch to ensure not being backwinded etc which would threaten the rigs on Madness and the Bieker Proa. As Russell Brown proved with Jzerro, pacific proas can be very fast if well designed and built.  

vaka990_3D1.jpg

Vaka990_sport.jpg, vaka_990_1.jpg, vaka_990_interior.jpg, vaka990_26 overall.jpg.

DossierVaka990 proa plan.pdf

32-proa-sailplan.jpg.

catsketcher Senior Member

Thanks (again) for another great series of posts. I am interested in the stability curve for the Bieker proa. It must be one of the very few multis that doesn't drop off consistently after max moment. I guess that is the effect of the pod coming into play. I got to go out on Russel Brown's proa in 2001 or so but we only went out for a motor. Beautifully built boat.  

Catsketcher. I got to speak to Russell when he was in Monty's yard in Queensland. A nice guy. He was modifying his proa by putting uni carbon fibre on the cross arms to minimize the "vibrations" caused by the float bursting thru wave tops. Asked what he would change, he said nothing beyond making the main hull 45 foot long and a chine hull bottom. A really good sailor and a fun boat for those capable of sailing it.  

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The attached Gruit PDF on composite construction is a bit technical but contains many gems of information about the relative strengths of resins, fabrics and composite construction approaches. The document tries to explain both in simple and occasionally with technical information the relative vices and virtues of each product and approach. EG The relative tensile strength of S glass and HS carbon are the same. Its just S glass elongates 3 times more than HS carbon before failure. The same applies to compressive strain where S glass compresses 3 % compared to HS carbons 1% before failure but they both fail under about the same pressure. The real difference between the 2 is S glass can take 6 times the impact pressure of HS carbon fibre. Translation HS carbon may be strong, but because it doesn’t elongate as well a S glass, it fractures more easily. Another aspect is the curing rate of resin versus its strength. In each case of polyester, vinylester and epoxy in a EG resin/fabric matrix, the tensile strength is 25% higher if it is post cured for 5 hours at 80 degree centigrade than if it is left at 20 degrees centigrade for 7 days. The discussion on fabric and core materials gives very good in sites into the virtues and/or vices of the different materials to allow you to make a more informed decision about there selection. EG SAN foams are able to elongate more and are tougher than PVC foams although they have similar strength characteristics. And there is differences between grades of PVC foams beyond strength. Some have greater resistance to styrene attack than others etc. A very informative document. Please read.  

guide-to-composites gruit.pdf

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ECO 55 Power Cat Plans

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Description

Additional information.

The ECO 55 power catamaran is an affordable DIY power catamaran. As the owner proved the boat is a capable coastal cruiser. The inside layout is the same as for the ECO55 sail version but the underwater shape is changed. The cockpit is wider and has a size of 1,45m x 2 m. With the bigger size normal deck chairs can be used. With a cockpit cover two more can sleep on the boat.

Accommodation is simple but practical.

Because of the easily driven hulls the boat will travel at about 12 knots with the a 15 HP outboard engine. But practice showed that a single outboard of 20 HP is more feasible - less noise and lower operating costs.

The boat has a double bunk, but the cockpit is big enough to sleep 2 more persons. The construction and list of materials is similar to the ECO55 sail version . The difference is that you need no rig, rudders or dagger board. With the low weight of about 325 kg including engines the boat can be towed behind a relative small car.

Construction is as always the plywood/glass/Epoxy construction system. The hulls are V-shaped with vertical sides - easy to build by a beginner. For cost estimation see the list of materials below.

• All drawings are CAD drawings
• Wood/epoxy composite for easy construction and low maintenance.
• Sleeps up to four

DELIVERY: 16 Drawings: JPG or DXF files. + Manual: 12 pages description (PDF)

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> > Please support our sponsors and let them know you heard about their products on Cruisers Forums. 21-03-2021, 09:51   346) I wonder about historical precedents, user experience and general principles. I am aware that the Canadian PDQs and Floridian Endeavourcats were derived from prior sailing versions, but this seems to be much less evident a trend in . Please note I am focussed on cruising/trawler models with hulls not semi-planing high-HP guzzlers, and in particular I am looking forward to the specific demands of the coming era. Of note here are pioneers such as the Sunroof Eco line where largely identical sailing and versions are available. I would welcome comments especially from those with nautical design and/or engineering backgrounds. 21-03-2021, 16:01   Boat: Schionning Waterline 1480 already have a suitable for that installed, ready to go. Just take down the . If you were starting from scratch to build one or the other, you would make the hulls differently but how much that matters at low speed on a I'm not sure. The provide some stability and I would think a pure motoring cat may have some extra stability in the design and weighting but again, I'm not sure it's really much of an issue. 22-03-2021, 03:11   Boat: 34' Crowther tri sold 16' Kayak now 22-03-2021, 04:01   22-03-2021, 04:21   Boat: 50ft Custom Fast Catamaran pics up. When I have my up, my does not handle well in close quarter situations. You have to have a little bit of something down there. To keep it from going sideways. Literally. The does not contribute to stability on a catamaran in any way, a Catamaran is form stable. That means the shape of the itself is what gives you the stability. If you think of it like a car and a motorcycle, that’s a good comparison. A motorcycle is like a mono hull, a car is like a catamaran. It is the shape/form of the car that keeps it stable around the corners. The motorcycle leans. If anything, a mast subtracts some stability from a Catamaran in the form of weight too high up and forces acting to tip the cat over. A power catamaran is basically the most stable configuration of a boat possible. Including all monohulls. In the doomsday storm, you’re in the best position in one of those. If you wanted to get a little bit more speed out of the thing, I believe getting rid of some of the rocker aft is a good idea. That contributes to a better top end speed. You’ll notice more efficient power boats do not have rocker aft.. Depending on the specific engines, you may like to upgrade to larger engines and different larger diameter props. Maybe. Depends on your ultimate goals. But it will operate like a good out of the box. With my Catamaran, with a at 30 hp, I pass lots of trawlers. Then there is the main point of my post.. Tankage. You’re going to want more . No matter what, a sailing catamaran is not designed with the level of fuel that a has. So you want to find a way to get more in the boat. That will increase your range and let you compete with the other trawlers. 22-03-2021, 06:56   22-03-2021, 07:04   22-03-2021, 07:21   , we estimated 6MPG at 6kts. We had about a 300-350mile range on full tanks. For coastal cruising, that will typically be more than adequate. versions of the boat got a bit better and if we slowed down to say 5kts, there was a big jump in MPG. 22-03-2021, 09:26   Boat: FP, Eleuthera 60 ..voila! 22-03-2021, 09:58   22-03-2021, 10:54   Boat: 34' Crowther tri sold 16' Kayak now 22-03-2021, 12:28   sailing cats are motored 90% of the time anyway such that the companies have started to charge for fuel where it was once included in the charter fee for sailing cats. A 47ft. sailing cat that I part-owned had long rudders, a short skeg , folding props and two 54HP engines. The 47' PowerCat that I now own has short rudders, no external , fixed props and two 150HP engines. Why don't you just buy one of those. 22-03-2021, 16:20   Boat: Cheoy lee perry 48 23-03-2021, 05:53   23-03-2021, 05:57   props and two 150HP engines. Why don't you just buy one of those. , , Thread Tools Rate This Thread : Posting Rules post new threads post replies post attachments edit your posts is are code is are are are Similar Threads Thread Thread Starter Forum Replies Last Post andreas.mehlin Engines and Propulsion Systems 0 27-11-2020 13:13 ranchero76 Multihull Sailboats 78 19-02-2020 12:27 Durangutan General Sailing Forum 35 12-10-2017 18:23 paradisenwfl Liveaboard's Forum 5 26-03-2017 07:21 DivinaVitae Electrical: Batteries, Generators & Solar 0 24-04-2015 13:08 No Threads to Display. - - - - - - - Privacy Guaranteed - your email is never shared with anyone, opt out any time. Sunset Luaus on the Bay  Tuesdays and Fridays | June 14 - August 30, 2024 A San Diego summer tradition on the shores of Mission Bay, the annual Sunset Luaus are a festive celebration of Polynesian food, music, and dances perfect for family and friends. The memorable luau experience includes a lei, Mai Tai, all-you-can-eat buffet, and entertainment. Local luau group Pride of Polynesia provides the authentic island music and dance, featuring hula and fiery torch dancers. Kids can also enjoy activities at the Kids Corner including lei making, festive crafts, luau-themed coloring, and stick-on tattoos. Purchase Luau Tickets All Patrons Regardless of Age Must Have a Ticket to Enter. Program Schedule 5:30 p.m. Doors Open for Kahuna VIP Seating (Mai Tai, Appetizer and Lei Greeting) 5:30 p.m. Live Music, Entertainment, and Kids Activities 6:00 p.m. Doors Open for all Seating (Mai Tai and Lei Greeting) 6:45 p.m. Open Buffet 7:30 p.m. Live Performance by Pride of Polynesia Upgrade Your Sunset Luau Experience  Kahuna VIP Seating This exclusive Kahuna VIP Seating ticket includes early arrival and check-in to the Sunset Luau, souvenir cup, welcome appetizer and a meet and greet with the Pride of Polynesia performers and reserved seating close to the stage.  Sunset Luau Menu Be transported to the islands with an impressive display of luau dishes including Kalua roast pig, spicy shrimp and grilled pineapple salad, and Hawaiian sweet rolls. Save room for dessert with tempting treats like pineapple cream pie. Fresh Sliced Seasonal Fruit Display gluten-free Tossed Kula Greens Poppy Seed Dressing (gluten-free, vegetarian) Balsamic Vinaigrette (gluten-free, vegan) Ginger Curry Chicken Salad Macadamia Nuts gluten-free Spicy Shrimp and Mango Salad gluten-free Island Pineapple Coleslaw gluten-free, vegetarian Traditional Macaroni Salad vegetarian Hawaiian Sweet and Assorted Rolls Butter Huli-Huli Chicken Grilled Pineapple Kalua Roast Pig Roast Mahi-Mahi Mango-Papaya Sauce gluten-free Ginger-Scented Vegetable Stir-Fry vegan Pineapple Fried Rice vegan Pandan Ube Cheesecake Chocolate Passionfruit Cake Coconut Rice Pudding Tropical Mirepoix Vegan/GF Pineapple Cream Pie Caramelized Banana Mousse Vegan/GF Orange Cupcakes Marshmallow Varieties GF Cookies Varieties Fresh Fruit Macaroni and Cheese Coconut-Crusted Chicken Fingers Sweet and Sour Sauce Tater Tots Ketchup and BBQ Sauce Coffee, Decaf & Tea Pitcher of Our Famous Catamaran Mai Tai (Serves 4 Guests) Bucket of Cutwater Cocktails (Serves 4 Guests) Souvenir Cup LED Lights Wines Premium | House Beers Imported | Craft | Domestic Spirits Premium | Call Soft Drinks Soda | Mineral Water ALL Patrons Regardless of Age Must Have a Ticket to Enter. Hotel guests must present room key or wristband. This event is subject to availability, capacity limitations, and weather conditions. All guests must be over 21 with valid photo ID to consume alcohol. Additional gratuities are not expected. Hotel reserves the right to refuse service in accordance with applicable laws. WARNING: Consuming raw or undercooked meat, eggs, poultry, seafood, or shellfish may increase your risk of contracting a foodborne illness, especially if you have certain medical conditions. California State Law prohibits the service or provision of alcoholic beverages, including beer and wine, to anyone under 21. The hotel reserves the right to discontinue or not serve alcoholic beverages to any customer or guest. WARNING: Drinking distilled spirits, beer, coolers, wine, and other alcoholic beverages may increase cancer risk and, during pregnancy, can cause birth defects. Best Luau in California! It is the best Luau I have attended in California. It made me feel as if I were actually in Hawaii. The dancers were highly skilled, professional, and beautiful, their whole program was outstanding. The food was abundant. They had a good variety of salads, entrees, and desserts. I thoroughly enjoyed the whole luau, the cost is well worth an evening of good food and great entertainment. I would love to return again next year. August 2023 Highly Recommend Private Luau Experience I coordinated with the Catamaran to host a private luau and buffet for my company. We got a lot of positive feedback about the event from our guests at the end of the night - many of them were hoping we could do it again next year! I would highly recommend the Catamaran's sunset luau for large, private gatherings. Audience Participation at the Luau! The musicians were great, and the dancers' costumes were fantastic. The fire dancer was amazing. A very enjoyable evening of food and entertainment. One complimentary Mai Tai and Lei upon entry. The luau experience was worth it. Other folks at our table were returning because they really enjoyed their experience last year. The luau also has audience participation, which is great for young and old. This property is beautiful My granddaughter and I enjoyed the waterfall, fish, ducks, and parrots. The pool and hot tub were nice and open at night when we wanted to relax. We did the VIP luau and really enjoyed it. The food was amazing, the real flower leis were gorgeous, and the show was entertaining. We were also treated to a Mai Tai drink in a souvenir cup and a non-alcohol drink in a pineapple cup for my granddaughter. We made some special memories together. When You Book Direct on CatamaranResort.com PREFERRED RATES Save big on your next San Diego vacation and receive the lowest room rates when you book direct. CUSTOMIZE YOUR EXPERIENCE Tailor your getaway with in-room amenity deliveries, discounted attraction tickets, and more. EXCLUSIVE OFFERS Join the email list to receive information about flash sales, room packages, and special event announcements. Sign In or Create Account Forgot password. If you don't receive the email within an hour (and you've checked your Spam folder), email us as [email protected]. 94538 homes for sale Fremont homes for sale Fremont foreclosures Fremont open houses New Construction For Sale All Fremont new construction Fremont new home communities Fremont new construction and plans 94538 housing market 94538 recently sold 94538 property records Fremont housing market Fremont recently sold Fremont property records Home buying checklist Home buyers reveal: 'What I wish I had known before buying my first home' First-time home buyer resource center More home buying insights Success stories Find the right selling option for you Compare agents & pick the right one See what your home is worth Complete guide to selling your home Should I sell my home now? How much is my home worth? How should I sell my home? How to select an agent? How to prepare your home for sale? See more home selling insights Recently sold homes in 94538 Recently sold homes in Fremont All 94538 rentals Apartments for rent in Fremont Houses for rent in Fremont All Fremont rentals Contacted rentals Landlord tools Manage rentals List your rentals Screen tenants Create a lease Collect rent online Renter's resource center Should I rent or buy? Debunked! 8 myths about renting you should stop believing immediately More renting insights Get pre-approved Fremont mortgage rates Home equity financing rates Refinance rates Finance advice For veterans Mortgage calculator Refinance calculator How much house can I afford Rent vs. buy 6 ways home buyers mess up getting a mortgage Mortgage guide Learn about home insurance More finance insights Top rated 94538 REALTORS ® Top rated Fremont REALTORS ® Search for real estate agent 6 reasons you should never buy or sell a home without an agent Difference between agent, broker & REALTOR ® Listing vs. buyer agent How to find a REALTOR ® Real estate agents reveal the toughest home buyers they've ever met More news around REALTORS ® The latest news Housing trends Real estate news Celebrity real estate Unique homes Corporate blog Home improvement 2024 housing market predictions NEW 2023 hottest zip codes Complete guide on how to sell your home Veterans home buyer guide USDA home loan guide Home insurance guide Real estate videos Housing resources 1,841 sqft 1,841 square feet 7,040 sqft lot 7,040 square foot lot 39626 Catamaran Ct, Fremont, CA 94538 Single family Open houses Property details. Huge price reduction for a home this size! This will go pretty quick at this price. Fantastic opportunity! This 4 bedroom and 3 full bath home with 1841 square feet of living space, plus a 285 square foot sun room is available for the first time in 2 generations. This home has a pool/spa combo, rv/b oat parking on a large 7, 040 square foot lot. New carpet and a lot of new paint make this home shine! The kitchen has great cabinetry and granite counters and stainless steel appliances. The convenient court location puts this home in the middle of everything Fremont! Minutes from the hospitals. Minutes from the softball park. Minutes from lake Elizabeth. A quick trip on Hwy 84 to Palo Alto. This is a great place to commute from ina family friendly sub division. Kennedy High is only blocks away! Home, pest, and roof inspections done. All necessary work has been done. The pool was not inspected. The bedroom upstairs could be an ADU as it has its own entrance, but no kitchen. There is plumbing for a sink. Having 2 masters is a great bonus! Show less Property features Bedrooms: 4 Other Rooms Total Rooms: 8 Free-Standing Range Refrigerator Gas Water Heater Laundry Features: Hookups Only, In Garage Heating and Cooling Cooling Features: Ceiling Fan(s) Fireplace Features: Family Room, Living Room Heating Features: Forced Air Heating: Yes Number of Fireplaces: 2 Full Bathrooms: 3 Interior Features Flooring: Hardwood, Laminate, Tile Window Features: Double Pane Windows Exterior and Lot Features Fencing: Fenced Pool and Spa Pool Features: In Ground, Pool/Spa Combo Pool Private: Yes Lot Description: Court, Irregular Lot, Premium Lot, Front Yard Lot Size Acres: 0.1616162 Lot Size Square Feet: 7040 Garage and Parking Garage Spaces: 2 Parking Features: Attached, Garage, Int Access From Garage, RV/Boat Parking, Side Yard Access, RV Access, Garage Door Opener School Information High School District: Fremont (510) 657-2350 Homeowners Association Calculated Total Monthly Association Fees: 0 Other Property Info Source Listing Status: Pending County: Alameda Cross Street: Trade Winds Directions: Blacow to Coco Palms to Banyan Tree to Trade Windr Source Property Type: Residential Source Neighborhood: 28 Palms Parcel Number: 5312272 Subdivision: 28 Palms Property Subtype: Detached Source System Name: C2C Building and Construction Total Square Feet Living: 1841 Year Built: 1961 Construction Materials: Composition Shingles, Stucco Levels: Two Story Property Age: 63 Property Condition: Existing Roof: Composition Shingles Levels or Stories: 2 Architectural Style: Traditional Electric: No Solar Find out more about this property. Local Home Services Monthly payment Connect with a lender, veterans & military benefits, property history, property price. Date Event Price Price/Sqft Source 07/29/2024 Price Changed $1,575,000 $856 BayEast 07/05/2024 Listed $1,635,000 $888 BayEast Property tax Year Taxes Total assessment equals Land added to Additions 2022 $1,600 $82,942 = $27,262 + $55,680 2021 $1,568 $81,316 = $26,728 + $54,588 2020 $1,476 $80,483 = $26,454 + $54,029 2019 $1,464 $78,904 = $25,935 + $52,969 2018 $1,430 $77,357 = $25,426 + $51,931 2017 $1,394 $75,841 = $24,928 + $50,913 2016 $1,354 $74,353 = $24,439 + $49,914 2015 $1,321 $73,237 = $24,072 + $49,165 2014 $1,287 $71,803 = $23,601 + $48,202 2013 $1,220 $71,478 = $23,494 + $47,984 2012 $1,184 $70,076 = $23,033 + $47,043 2010 $1,064 $68,703 = $22,582 + $46,121 2009 $1,052 $68,189 = $22,413 + $45,776 2008 $1,017 $67,012 = $22,026 + $44,986 2007 $979 $65,697 = $21,594 + $44,103 Want to get comps? Neighborhood, city in alameda, ca. Restaurants Ask a neighborhood expert. Nearby neighborhoods in Fremont , CA Niles Median listing: $1,474,000 Ardenwood Median listing: $1,390,000 Cherry Guardino Median listing: $799,000 Warm Springs Median listing: $769,999 Environmental risk School information from listing agent High School District : Fremont (510) 657-2350 Rating School name Grades Type Students Reviews Distance K - 6 public 684 0.2 mi 6 - 8 public 1056 0.6 mi 9 - 12 public 1393 0.3 mi RealEstimate℠ Fremont market trends A city in Alameda, CA Nearby home values Address Estimate Bed Bath Sqft Lot (sqft) $1,575,000 4 3 1841 7040 N/A 3 2 1116 6707 $205,000 4 2 1437 8112 $581,000 3 2 1200 5850 $1,020,000 3 2 1200 5785 $83,000 4 2 1703 7956 $28,700 4 3 1838 5626 $203,000 4 2 1456 8112 $365,000 4 2 1456 5605 $442,000 3 2 1200 5605 $245,000 3 2 1627 5626 $505,000 3 2 1280 N/A $400,000 4 2 1456 6621 $167,000 3 2 1914 5850 $345,000 3 2 1067 5605 $61,000 3 2 1469 5605 $210,000 3 2 1200 5626 $464,000 4 2 1760 7956 $470,000 4 2 1456 5626 $3,256,500 3 2 1116 5626 $233,000 3 2 1632 5605 $955,000 3 2 1200 5605 $860,000 3 2 1420 6970 $1,158,000 4 2 1500 5720 $482,500 3 2 1067 5605 N/A 4 3 2320 5626 Learn more about 39626 Catamaran Ct Listed by Scott Dunlop state license # 01362318 Brokered by Scott Dunlop, Re Broker (510) 468-1316 Similar homes 1,701 sqft 1,701 square feet 1,564 sqft 1,564 square feet 1,944 sqft 1,944 square feet 2,553 sqft 2,553 square feet 1,736 sqft 1,736 square feet 1,740 sqft 1,740 square feet 1,696 sqft 1,696 square feet 1,760 sqft 1,760 square feet 1,832 sqft 1,832 square feet 1,950 sqft 1,950 square feet 1,443 sqft 1,443 square feet Homes around $1,575,000 1,488 sqft 1,488 square feet 3,800 sqft lot 3,800 square foot lot 1,148 sqft 1,148 square feet 6,080 sqft lot 6,080 square foot lot 2,230 sqft 2,230 square feet 6,100 sqft lot 6,100 square foot lot 5,510 sqft lot 5,510 square foot lot 1,347 sqft 1,347 square feet 6,600 sqft lot 6,600 square foot lot 1,152 sqft 1,152 square feet 6,268 sqft lot 6,268 square foot lot 1,776 sqft 1,776 square feet 2,313 sqft 2,313 square feet 1,680 sqft 1,680 square feet 3,600 sqft lot 3,600 square foot lot 1,668 sqft 1,668 square feet 6,000 sqft lot 6,000 square foot lot 1,460 sqft 1,460 square feet 6,523 sqft lot 6,523 square foot lot 1,324 sqft 1,324 square feet 7,840 sqft lot 7,840 square foot lot 1,738 sqft 1,738 square feet 1,452 sqft 1,452 square feet 7,920 sqft lot 7,920 square foot lot 39626 Catamaran Ct, Fremont, CA 94538 is a single family home for sale listed on the market for 54 Days. 39626 Catamaran Ct, Fremont, CA 94538 is in the 28 Palms neighborhood. The schools near 39626 Catamaran Ct, include Joseph Azevada Elementary School , John F. Kennedy High School and G. M. Walters Junior High School . 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There is a saloon that can be converted into a double berth - positioned athwartships -, a galley in the starboard hull and a single berth - accompanied by a heads ... ECO 6 Plans ECO 6 Plans. Note: This is the full plan, for the study plans click HERE. The ECO 6 looks like the ECO55 cruiser, but it is a completely new design. The small increase of only 0.5m and increasing the total beam to 2.84m created a lot of possibilities. The cabin is much bigger; the boat now sports an enclosed bath room. ECO6inpictures The ECO 6 coastal cruiser catamaran for amateur construction. An easy to build wood/fiberglass/Epoxy constrution. Building step photos and renderings from th... Duckworks The ECO 6 is clearly an enlarged version of our well known ECOnomy cruiser. The ECOnomy cruiser is 5.5m long with a beam of 2.5m. One of my clients in Brazil, who by the way has made these beautiful renderings of the boat, wanted to use the Gunter rig and bigger ECO. By looking at the possibilities new ideas could be realized - bigger cockpit ... The boat that David and I built This is the story of building an ECO 6 catamaran sailboat, designed by Bernd Kohler. The boat was built with considerable advice from another boat builder, D... ECO6NewZealand ECO6 is a catamaran for amateur construction in the plywood, glass, and Epoxy system. For more information go to https://ikarus342000.com/ECO6page.htmlor htt... Multihull Structure Thoughts It is a bridgedeck cruising catamaran that filled the slot between the ECO 6 and KD 860. The cat is 24.5 x 14.75 foot and weighs 1650 lbs it displaces 3100 lbs. It carries 305 square foot of sail in a sloop rig. There is a Gunter rig option for those who have to pass under low bridges etc. The hulls L:B is 9:1, in short a reasonable cruiser. CATAMARAN eco6 sail catamaran Nutshell Catamarans - Sailing and power catamarans for rent, charter or fractional ownership Nutshell Catamarans builds boats using the highest quality materials and craftsmanship, all with customers and incredible experiences in mind CATAMARAN eco6 sail catamaran CATAMARAN eco6 sail catamaran | 3D CAD Model Library | GrabCAD. Join 9,350,000 engineers with over 4,850,000 free CAD files. The CAD files and renderings posted to this website are created, uploaded and managed by third-party community members. CATAMARAN eco6 sail catamaran CATAMARAN eco6 sail catamaran | 3D CAD Model Library | GrabCAD. Join 13,990,000 engineers with over 6,230,000 free CAD files. The CAD files and renderings posted to this website are created, uploaded and managed by third-party community members. This content and associated text is in no way sponsored by or affiliated with any company ... ECO 55 Power Cat Plans ECO 55 Power Cat Plans. The ECO 55 power catamaran is an affordable DIY power catamaran. As the owner proved the boat is a capable coastal cruiser. The inside layout is the same as for the ECO55 sail version but the underwater shape is changed. The cockpit is wider and has a size of 1,45m x 2 m. With the bigger size normal deck chairs can be used. CATAMARAN KD 860 SAIL CATAMARAN BLUE WATER CATAMARAN KD 860 SAIL CATAMARAN BLUE WATER | 3D CAD Model Library | GrabCAD. Join 9,280,000 engineers with over 4,820,000 free CAD files. The CAD files and renderings posted to this website are created, uploaded and managed by third-party community members. This content and associated text is in no way sponsored by or affiliated with any ... Converting sailing cat designs to motor power: What are the prime It is the shape/form of the car that keeps it stable around the corners. The motorcycle leans. If anything, a mast subtracts some stability from a Catamaran in the form of weight too high up and forces acting to tip the cat over. A power catamaran is basically the most stable configuration of a boat possible. Including all monohulls. ECO 6 photo galley. This catamaran is an easy to build boat ... ECO 6 catamaran photos. ePowered Catamaran Conversions ePowered Catamaran Conversions. Converting or repowering catamarans (sail or not) from internal combustion engines to electric motors is a growing trend among boaters who seek to free... THE TOP 10 California Catamaran Cruises (Prices from $35) from. $85.00. Luxury Catamaran Sunset and Wine Cruise from Dana Point. 38. Watch the sunset aboard a luxury catamaran on this 90-minute evening cruise from Dana Point Harbor in Orange County. Sample organic wines accompanied by cheese, crackers, fruits, and nuts while taking in the ocean views. 1 hour 30 minutes. Authentic Sunset Luau at the Catamaran Resort in San Diego Live Music, Entertainment, and Kids Activities. 6:00 p.m. Doors Open for all Seating (Mai Tai and Lei Greeting) 6:45 p.m. Open Buffet. 7:30 p.m. Live Performance by Pride of Polynesia. Upgrade Your Sunset Luau Experience Kahuna VIP Seating. This exclusive Kahuna VIP Seating ticket includes early arrival and check-in to the Sunset Luau, souvenir ... ECO6sailing ECO6 sailing in New Zealand. Not match the wind, but a good boat speed.For more information go to https://ikarus342000.com/ECO6page.html San Diego Yacht Charters Looking for the best local San Diego yacht charters and yacht rentals? If you are interested in catamaran rental, the Adventuress is a... CATAMARAN eco6 sail catamaran files The GrabCAD Library offers millions of free CAD designs, CAD files, and 3D models. Join the GrabCAD Community today to gain access and download! 39626 Catamaran Ct, Fremont, CA 94538 39626 Catamaran Ct, Fremont, CA 94538 is pending. View 36 photos of this 4 bed, 3 bath, 1841 sqft. single family home with a list price of $1575000. catamaran gulet motorboat powerboat riverboat sailboat trimaran