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I just bought the plans for an Eco 6 and realized that the maximum trailer length in Massachusetts is 2.6m. ?I guess i could just take 0.25m out of the middle, but what problems might that create?
David Bryant Ipswich, MA
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Hi David
Under no circumstances reduce the beam of the ECO 6. Boats are designed for the water and not the rodad. The boat needs the beam for its stability, with other worts for your safety. I know, that there are catamarans with beams which would fit the streed restriction of 8 feet. Look at the many acitents these boats had, special in Australia. It is reliativ easy to get from the road autorities a permanent, or at least a semi permanent permission to trailer the boat as is legally.?
Cheers
Bernd
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Is not the 5.5 model what you really want?
On Sat, Feb 10, 2018 at 2:31 PM, david.bryant4@... [k-designs] <k-designs@...> wrote:
?
I just bought the plans for an Eco 6 and realized that the maximum trailer length in Massachusetts is 2.6m.? I guess i could just take 0.25m out of the middle, but what problems might that create?
David Bryant Ipswich, MA
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Thanks Bernd,
I had suspected as much which is why I asked. ?Greg also suggested that the Eco 5.5 maybe a better boat for my needs. ?I have already purchased the plans, just today, so could you substitute those for the 5.5?
David Bryant Ipswich, MA
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Umm, but perhaps you can elaborate on the "accidents" these boats have had in Australia?
David Bryant Ipswich, MA
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Hello David
It is very difficult to compare the ECO 5.5 with the ECO 6 which is learly shown in the info material you already have. Genereal, ECO 6 is "Double" the boat of the ECO 5.5. So it has not only a lot more space in and outside but is also more seaworthy. On the other side it is not a lot more work. I have right now no time, but I will explain the big difference in stability of a 2,5m boat and a boat with a beam of 2,84m. By the way, at my download page is a program where you can calculate by yourself the difference. "Dynamic stability" program.? I will not mention any design and designer who had problems with the instability of there boats for obviouse reasons. Before you change to a smaller boat. I would first talk to the traffic control autorities. In 90% of the counties in the USA you can have special permissions for wider boats.
Bernd
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Brend,
Thanks for your prompt reply and information. ?Yes the benefits of the larger boat is obvious which is why I initially chose it. ?And yes MA does offer a special permit for wider boats, but now as I think about it the shorter length would better fit my building space and I would only have to scarf 2 8' lengths of plywood rather than 3. ?But I may be able to order pre scarfed 20' ply. ?Also, regarding the PDF files, I have found a local CNC service that can cut the panels so I will obtain a quote to see if that would be better than cutting them out myself. ?If it is reasonable it should be worth the savings in build time.
I'm sorry, I misunderstood your statement regarding the other boats. ?Thanks for clearing that up.
Dank u wel,
David
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Hi All.
One easy trailer modification that can be explored is a cradle that tilts to between .30 and 40 degrees. I have seen a few cat sailors in Durban, using that modification.. Albeit with smaller boats.
Regards, Gerrit.
On Feb 11, 2018 16:09, " Bernd@... [k-designs]" < k-designs@...> wrote:
Hello David
It is very difficult to compare the ECO 5.5 with the ECO 6 which is learly shown in the info material you already have. Genereal, ECO 6 is "Double" the boat of the ECO 5.5. So it has not only a lot more space in and outside but is also more seaworthy. On the other side it is not a lot more work. I have right now no time, but I will explain the big difference in stability of a 2,5m boat and a boat with a beam of 2,84m. By the way, at my download page is a program where you can calculate by yourself the difference. "Dynamic stability" program.? I will not mention any design and designer who had problems with the instability of there boats for obviouse reasons. Before you change to a smaller boat. I would first talk to the traffic control autorities. In 90% of the counties in the USA you can have special permissions for wider boats.
Bernd
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Hi Gerrit
Here in France the do it a lot, special with the big cats. It does not work for all catamarans, it depends on the height to with relation of the boat.
Regards
Bernd
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Thanks Gerrit,
Do you know if there are any photos online that could display this kind of trailer?
David
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Hi David.?
I am out of my country, so not in contact..Maybe Berndt can cast some light on the trailer design? am not familiar with the overall requirements. I can make some enquiries.?
Regards, Gerrit
On Feb 11, 2018 21:59, " david.bryant4@... [k-designs]" < k-designs@...> wrote:
Thanks Gerrit,
Do you know if there are any photos online that could display this kind of trailer?
David
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Hi David Just a quick note here. Remember you can use butt joints to connect the plywood if you don¡¯t want to scarf the plywood. And you can do the gluing on the boat itself, panel by panel. It is a matter of routing out some notches in the stringers for the butt strap (only as deep and wide as the butt strap), gluing the butt strap in the notch, and then gluing your ply panel on (which you have already cut to the right shape). Also, it will be interesting to see if the cost of cnc cutting the bulkheads is worth it, as most of Bernd¡¯s designs have bulkheads with straight lines. You plot the points on the ply panel, then draw straight lines to connect the dots. Then I think it is easy to clamp on a straight edge as a guide and cut them with a circular saw with lots of teeth. The hard work is plotting the points. But you have to do that with a cnc cut also. Then you also have to cut out the stringer notches, but once again the hardest part is making sure you know where they go.?
Best of luck to you on the build! I started out thinking trailerable monohull, then got a case of the ¡°might as well¡±s and the idea grew and grew and now we are building a 12m cat. So be careful :) Cheers Patrick
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Hi Patrick
Thanks for joining in. It is as you mention uninteresting to have the bulkheads or any other part CNC cut. Was it a boat with U shaped sections the story would be different. It is it not worth to have the parts CNC cut and a waste of money.
Bernd
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The gain is less as you will expect. Because it is a funktion of beam to height of the boat. The trailer would be a very expensive affaire and the boat can not so far canted that it will be inside the 8 feet requirments.
Bernd
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Hi Brendt,
I wrote about CNC cutting of the panels for the Eco 6 but my name is not Patrick so I don't know if you were replying to me or not.
In any event, ?I cannot read the files, nor can I print them, unless they are in PDF format. Could you let me know if this is possible?
David
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I was given no answer to the CNC cutting special to you. I have the drawing files in PDF to. But be aware that with file conversion, in this case from DXF CAD/CAM/ files to normal read files system like PDF mistakes by translation can happen. In the ?plans letter I send to you a link is given for a free of charge DXF reader/printer program from AutoCad. Here again
Please send you your email addres again and I send you the PDF files.
Bernd
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Bernd,
I have a Mac computer so I cannot install the free software. ?But regardless the printing shop that will plot the files only works with PDF files, so ben if I could open DXF I would still have to convert to PDF.
Do the translation mistakes affect scale or dimensions of patterns?
Sorry for the inconvenience.
David ---In k-designs@..., <Bernd@...> wrote : I was given no answer to the CNC cutting special to you. I have the drawing files in PDF to. But be aware that with file conversion, in this case from DXF CAD/CAM/ files to normal read files system like PDF mistakes by translation can happen. In the ?plans letter I send to you a link is given for a free of charge DXF reader/printer program from AutoCad. Here again
Please send you your email addres again and I send you the PDF files.
Bernd
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Here is my email for the PDF files
david.bryant4@...
Thanks,
David ---In k-designs@..., <Bernd@...> wrote : I was given no answer to the CNC cutting special to you. I have the drawing files in PDF to. But be aware that with file conversion, in this case from DXF CAD/CAM/ files to normal read files system like PDF mistakes by translation can happen. In the ?plans letter I send to you a link is given for a free of charge DXF reader/printer program from AutoCad. Here again
Please send you your email addres again and I send you the PDF files.
Bernd
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I had my bulkheads cnc cutted in Brasil were I live, the 650 was my second boat diy, for me it was worth since it kick starts the build, used the time for the pieces to arrive building the jig... and could really be sure all pairs were equal... -- ?Att,
?Luiz Boms ?Tel_21_982763737
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Thank you Patrick,
I also have a problem with "mission creep" ?but my drive way and my wife limit my ambitions. ?:)
David
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Bernd Kohler