Hi Pete
Congratulation to have your boat afloat; It was a long way, but the climate (you was knowing it); You did it anyway in a relatively short time. So enjoy your boat. Thanks for the very nice photos.
Cheers
Bernd
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congratulations Pete, looks great
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Hi there My KD 860 is now floating. I removed it to finalize it near my cabin. I motored 25 miles in calm conditions. Engine mount works well, only some annoying vibrations. 6 knots 1/2 throttle, 7.5 full. Bow is up (like it should be without rig, front beam etc.). There are about 300 kg gear onboard; engine, gas, stove, fridge, heater, battery, butan bottle, anchor, ropes, water, ... I posted some pictures to KD860 Fi -folder. Uploading is now working! Cheers, Pete
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Domenico,
I will try and post more pictures. I tried to before a few times, but it did not work. Yes, the brackets that you see under the bridge deck are for what some people call sleds. The outboards will be mounted on these sleds. I like the idea better than a fixed mount because you can get the outboard very close to the water when motoring, but very high above the water when raised. The tasmanian 860 on this forum has one in the center. Another good example is on Jim Brown¡¯s trimaran Scrimshaw, which might be found online somewhere. A picture of the sled on Scrimshaw is also in Chris White¡¯s book, The Cruising Multihull. So the idea has been around for a while. I think it is not more popular because the sleds and motors take up some of the space where you would keep the dinghy.
I have not built the sleds yet, but I think they will work.
Cheers!
Patrick
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Hi Patrick I was waiting for this moment. Great work spectacular the photo where you see the stern. I have to ask you a question: wading under the transom (bh6) I see two attacks on the sides near the hulls inside, What are they? engine attack? As Bernd says put more pictures, do like me ;-))
Bye
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Thanks, Bernd. As to the trampoline connection tubes, I think the method is strongest when the tubes are placed right at deck level, so the tramp tension is not trying to delaminate the glass. But in order to do that, you need to have the top of the forward cross beam at the same level as the deck. And have less slope to the deck fore and aft. And that means slightly taller bows. But the method was quick and relatively easy as we did it.
P
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Hi Patrick
Thanks for the explanation of strengthening the trampoline rails. The strange thing is that this part a very high load is involved because it is an absolute vertical load on the connection points. A good description of how to do it right.? Yes, it is a long time we heard nothing from you, and when you have more pictures, please add them. By the way, the picture from astern is impressive.
Cheers
Bernd
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It has been a good thing to connect with many of you over the years. Thanks for that. After a long while, here is another short update...
We put carbon uni strips on the wishbone boom - what a fun job that was! Each strip was about 13.6 m long!
And we applied a long strip of uni carbon to the big ¡°V¡± on the interior side of the mast beam to accommodate the forces of a center mast.
We also attached pvc tubes as net attachments, which is a well tested method. You glass over the tubes, then cut notches in the tubes, then put a rod through the tubes and you can tie the tramp to the rod. I wanted some extra strength, so before filleting and glassing the tubes, I drilled 12mm holes (one above, one below) every 200mm. Then we put narrow carbon strips through the holes with a little rectangle of glass on the interior side to cover the carbon. After that we filleted the tubes and sanded and glassed over them with biax and normal cloth.
Also, the top of the bridge deck floor is finally done.
It has been so long since I updated the forum that I can¡¯t remember what is new. Oh well. If anyone would like more details on anything you notice in the pics, let me know. I might have more pictures.
Cheers. Thanks for sharing your pictures.
Patrick
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Re: Power ECO 75 Electric
Hi Philip
When I want a strong and easy to apply then micro balloons the easier way. Cotton fibers are more difficult to work with. Microfibers are good for more strength. But need sanding afterward.? It is what you want and can work the best with.
BY THE WAY? THE UPLAND WORKS AGAIN; SO ANYBODY WHO WOULD LIKE TOO UPLOAD GO AHEAD
Cheers
Bernd
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Re: Power ECO 75 Electric
Hi, making glue I think any microfibre are better than microbaloons, I use cotton fibre. mirobaloons work well for stuf you want to fil and then sand. Cheers Philip malan
On Wednesday, July 10, 2019, 07:17:35 PM GMT+2, Bernd Kohler Bernd@... [k-designs] <k-designs@...> wrote:
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I have not much time but so far; You make strong bulkheads by gluing the battens to the bulkhead plywood. The battens are glue at the side forward till the bow. from the point, the battens must be scarved on the backside the battens are mounted on the backside towards the transom. So there is a small overlap over the bulkheads forwards or backward.? I am sorry that the photo folders are not working, talk to the new owner of Yahoo (I think it is Verizon, please other people too) It is very annoying I know.? To not speak in percentages. To glue use the Epoxy as glue mix the aerosil and micro ballons so that you get a "soft butter" consistency
Cheers
Bernd
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Re: Power ECO 75 Electric
Hi Ed
You are right?! But got get it rentable is the other question. To give an idea of what we are talking about to get the picture. For 10 kW we need 1 kg Lithium. This sounds not much but to get also for a light car a driving distance of 150 km you nee at 20-degree Celsius 34 kW; let's use as example seawater which has a content of 183 micrograms per liter. Let's do it solar on a big surface? To extract 1 kilogram of Lithium you need? 18.300.000 liter of water. To find the necessary area would be a problem. To talk about the other practical systems and materials to extract the Lithium my numbers are correct.?
Cheers
Bernd
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Re: Power ECO 75 Electric
Hi Jack, If you have questions feel free to ask me. Can also give you an hands on intro to epoxy working. Cheers, Pepijn
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Op 10 jul. 2019 om 17:45 heeft jack.machielsen@... [k-designs] < k-designs@...> het volgende geschreven:
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Hi Bernd,
I think you missunderstand my questions. I don't have the intention to change the design more than already mentioned. I just was wondering if I need to glue the battens around the bulk heads before I install the bulk heads to the frames, or after the stingers are installed, and in which direction they should face? The resin mix will also not be changed and mixed according the instruction of Gurit in my case. In the instruction manual you talk about adding 20% aerosil and 15% micro bubbles, but it not clear to me if this ratio is by weight or volume?
I've tried to view the pictures on this forum, but on some kind of reason the pictures won't load or only very slow...
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Re: Power ECO 75 Electric
I have not much time but so far; You make strong bulkheads by gluing the battens to the bulkhead plywood. The battens are glue at the side forward till the bow. from the point, the battens must be scarved on the backside the battens are mounted on the backside towards the transom. So there is a small overlap over the bulkheads forwards or backward.? I am sorry that the photo folders are not working, talk to the new owner of Yahoo (I think it is Verizon, please other people too) It is very annoying I know.? To not speak in percentages. To glue use the Epoxy as glue mix the aerosil and micro ballons so that you get a "soft butter" consistency
Cheers
Bernd
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Re: Power ECO 75 Electric
Hi Bernd,
I think you missunderstand my questions. I don't have the intention to change the design more than already mentioned. I just was wondering if I need to glue the battens around the bulk heads before I install the bulk heads to the frames, or after the stingers are installed, and in which direction they should face? The resin mix will also not be changed and mixed according the instruction of Gurit in my case. In the instruction manual you talk about adding 20% aerosil and 15% micro bubbles, but it not clear to me if this ratio is by weight or volume?
I've tried to view the pictures on this forum, but on some kind of reason the pictures won't load or only very slow...
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Re: Power ECO 75 Electric
Hello Jack
I will not comment on the changes you will make to the boat; But please read the instruction manual carefully and look at the pictures here at the forum and there are the answers. The Battens are necessary to have enough gluing surface for the planking. So logical the battens are glued to the bulkheads.? For gluing use Epoxy glue which the retailers will have. The mixture ratios are approximations for Epoxy glue. I suspect that you have not enough experience to make the glue by yourself. Have you ever built a boat, special a wood<Epoxy composite boat? If not, please make no changes to the design. You would waste your time and money, sorry that I have to write this.
Cheers
Bernd
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Re: Power ECO 75 Electric
Hi Bernd,
I made a new table of offsets.? The line D E1/E is extended in the same angle till it crosses the line which is under a 45 dgr. angle to the roof side. The roof will be the solar panel made from poly cabonate plates which are 2050 mm wide. BH4 is the full ply wood length high, which is 2510 mm. BH1, 6, 7 and 8 are default. I'll try to send you the offset table which I created, but the last line was created will drawing on the ply panel.
Some questions popped up: - the battens around the bulk heads, do i mount them on the bulk heads before the bulk heads are mounted on the frame, or after the stingers are installed? - for glueing the battens and stingers you talk about a resin mix with 20% aerosil and 15% microbubles. are the 20% and 15% in weight or volume? - are all battens on the bulk heads ( except BH 8 ) facing to the transom?
Regards, Jack
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Re: Power ECO 75 Electric
Lithium is the 24th most abundant element on Earth, with about 680 Billion tonnes of it available in seawater alone. It can be extracted from seawater via evaporation, so it doesn¡¯t need to use fresh water.
Because increasing popularity of electric cars, lithium production is struggling to keep pace with demand ¡ª that¡¯s where the idea of lithium shortages come from. Also, the commonly cited worldwide lithium reserves of 13.5 million metric tonnes by the USGS does only includes what is found in higher concentrations on land.
Hope this helps ease your concerns about using lithium based batteries. I recommend LiFePO4, since that chemistry is far safer.
Cheers!
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Hi Pete
The old problem. I will complain to the follow-ups from Yahoo;?
Cheers
Bernd
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Re: Power ECO 75 Electric
Hi Jack
Interesting to hear. 1m longer is ok but standing height in the cabin. Keine Kuchbude (see Google translator). Some pictures drawings? Send them to my email address because of the old and new problem with Yahoo or whatever it starts again.
Bernd
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Re: Power ECO 75 Electric
Short update on the project: All Bulkheads are cut and in first layer of epoxy. As the boat will have full standing height in the salloon and is extended by 1 mtr. I had to redesign some of the bulkheads, which was time consuming.
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Bernd Kohler
Philip Malan
Bernd Kohler