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#2
posted to rec.boats
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17' Mahogany runabout just completed
On Wed, 28 Nov 2007 15:46:59 GMT, "Delburt D"
wrote: I am open to discuss construction techniques and such in this forum. I am curious about one thing - did you build this using cold mold techniques? By the way, anyone interested in buying one of these? G I'm not that's for sure. Although if you could transfer that drive technology to a 23' CC that will do 30 mph on extended runs - like say for eight hours - I'd be all over it. :) |
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#3
posted to rec.boats
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17' Mahogany runabout just completed
"Short Wave Sportfishing" wrote in message ... On Wed, 28 Nov 2007 15:46:59 GMT, "Delburt D" wrote: I am open to discuss construction techniques and such in this forum. I am curious about one thing - did you build this using cold mold techniques? Actually this boat is a traditional plank on frame construction. We did incorporate a ply/ plank bottom to reduce maintanance issues. But other than that it is built using traditional methods. I did improve on the deck to hull construction. CC used the margin plank/beam and butted the side frames and deck frames into that. I married the deck frames directly to the side frames and treated the margin planks like planks. Much thinner and lighter but still very strong. We used a gel epoxy throughout the boat along with about 7000 silicon brone boat screws. While we did not have to steam any of the planks or other components we did utilize very hot water baths for 20 minutes for the more agressive bends. By the way, anyone interested in buying one of these? G I'm not that's for sure. Although if you could transfer that drive technology to a 23' CC that will do 30 mph on extended runs - like say for eight hours - I'd be all over it. :) Just for the record, we are using a 15000 watt battery pack that weighs 828 lbs. Add to that the battery cable, 2/0 welding cable, the charger, this is a plug in, Controllers etc. With battery technology what it is today we are lucky to push a nice little light weight hull like ours as much as we can. The future however is looking brighter for much better batteries with higher capacity and much less weight. Still I would venture a guess that a 23' CC would probably weigh 3500 4000 lbs? Our baby weighs in at a mere 2200 without passengers. I used a monocoque construction which enabled me to use much smaller scantlings through out the boat. She was designed for this application. For your application if you want to go green, bio-diesel then you have a real stink pot G Tom |
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#4
posted to rec.boats
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17' Mahogany runabout just completed
"Delburt D" wrote in message news:ILn3j.15376$B21.15016@trndny07... Just for the record, we are using a 15000 watt battery pack that weighs 828 lbs. Add to that the battery cable, 2/0 welding cable, the charger, this is a plug in, Controllers etc. With battery technology what it is today we are lucky to push a nice little light weight hull like ours as much as we can. The future however is looking brighter for much better batteries with higher capacity and much less weight. Where is the high capacity battery technology heading? The last major advancement I am aware of was the development of lithium ion technology but you don't see many of those in really big battery applications. Lithium can also be a bit dicy in terms of handling (or getting wet) if I recall correctly. Seems like we are still stuck in the lead/acid age, either in wet cell or AGM configurations despite many years of forecasts predicting major technological breakthroughs in battery construction. Eisboch |
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#5
posted to rec.boats
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17' Mahogany runabout just completed
On Nov 29, 2:24 am, "Eisboch" wrote:
"Delburt D" wrote in message news:ILn3j.15376$B21.15016@trndny07... Just for the record, we are using a 15000 watt battery pack that weighs 828 lbs. Add to that the battery cable, 2/0 welding cable, the charger, this is a plug in, Controllers etc. With battery technology what it is today we are lucky to push a nice little light weight hull like ours as much as we can. The future however is looking brighter for much better batteries with higher capacity and much less weight. Where is the high capacity battery technology heading? The last major advancement I am aware of was the development of lithium ion technology but you don't see many of those in really big battery applications. Lithium can also be a bit dicy in terms of handling (or getting wet) if I recall correctly. Seems like we are still stuck in the lead/acid age, either in wet cell or AGM configurations despite many years of forecasts predicting major technological breakthroughs in battery construction. Eisboch My little mahogany skiffs with an 8 horse will make a smaller carbon footprint than the electric plants used to charge these things, hopefully when I come here selling them in spring, I get such a warm reception...  |
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#6
posted to rec.boats
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17' Mahogany runabout just completed
wrote in message ... On Nov 29, 2:24 am, "Eisboch" wrote: "Delburt D" wrote in message news:ILn3j.15376$B21.15016@trndny07... Just for the record, we are using a 15000 watt battery pack that weighs 828 lbs. Add to that the battery cable, 2/0 welding cable, the charger, this is a plug in, Controllers etc. With battery technology what it is today we are lucky to push a nice little light weight hull like ours as much as we can. The future however is looking brighter for much better batteries with higher capacity and much less weight. Where is the high capacity battery technology heading? The last major advancement I am aware of was the development of lithium ion technology but you don't see many of those in really big battery applications. Lithium can also be a bit dicy in terms of handling (or getting wet) if I recall correctly. Seems like we are still stuck in the lead/acid age, either in wet cell or AGM configurations despite many years of forecasts predicting major technological breakthroughs in battery construction. Eisboch My little mahogany skiffs with an 8 horse will make a smaller carbon footprint than the electric plants used to charge these things, hopefully when I come here selling them in spring, I get such a warm reception... While we are looking at 15000 watt hours of power it still only takes $1.50 , ( ref $.10 / KW ) to fully charge the packs as is. Compare to $150 to fill a 50 gal gas tank. I know we are talking a difference in performance levels but you can still be out on the lake all day and not only make a much smaller carbon foot print but also NO Carbon Monxide or burned oil residue or any of the many other compounds created by burning gasoline in an internal combustion engine. Tom |
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#7
posted to rec.boats
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17' Mahogany runabout just completed
On Thu, 29 Nov 2007 17:07:51 GMT, "Delburt D"
wrote: wrote in message ... On Nov 29, 2:24 am, "Eisboch" wrote: "Delburt D" wrote in message news:ILn3j.15376$B21.15016@trndny07... Just for the record, we are using a 15000 watt battery pack that weighs 828 lbs. Add to that the battery cable, 2/0 welding cable, the charger, this is a plug in, Controllers etc. With battery technology what it is today we are lucky to push a nice little light weight hull like ours as much as we can. The future however is looking brighter for much better batteries with higher capacity and much less weight. Where is the high capacity battery technology heading? The last major advancement I am aware of was the development of lithium ion technology but you don't see many of those in really big battery applications. Lithium can also be a bit dicy in terms of handling (or getting wet) if I recall correctly. Seems like we are still stuck in the lead/acid age, either in wet cell or AGM configurations despite many years of forecasts predicting major technological breakthroughs in battery construction. Eisboch My little mahogany skiffs with an 8 horse will make a smaller carbon footprint than the electric plants used to charge these things, hopefully when I come here selling them in spring, I get such a warm reception... While we are looking at 15000 watt hours of power it still only takes $1.50 , ( ref $.10 / KW ) to fully charge the packs as is. Compare to $150 to fill a 50 gal gas tank. I know we are talking a difference in performance levels but you can still be out on the lake all day and not only make a much smaller carbon foot print but also NO Carbon Monxide or burned oil residue or any of the many other compounds created by burning gasoline in an internal combustion engine. Tom And, most importantly, spill fewer cocktails! -- John H |
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#8
posted to rec.boats
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17' Mahogany runabout just completed
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#9
posted to rec.boats
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17' Mahogany runabout just completed
On Dec 1, 5:47 pm, John H. wrote:
On Thu, 29 Nov 2007 05:52:52 -0800 (PST), wrote: On Nov 29, 2:24 am, "Eisboch" wrote: "Delburt D" wrote in message news:ILn3j.15376$B21.15016@trndny07... Just for the record, we are using a 15000 watt battery pack that weighs 828 lbs. Add to that the battery cable, 2/0 welding cable, the charger, this is a plug in, Controllers etc. With battery technology what it is today we are lucky to push a nice little light weight hull like ours as much as we can. The future however is looking brighter for much better batteries with higher capacity and much less weight. Where is the high capacity battery technology heading? The last major advancement I am aware of was the development of lithium ion technology but you don't see many of those in really big battery applications. Lithium can also be a bit dicy in terms of handling (or getting wet) if I recall correctly. Seems like we are still stuck in the lead/acid age, either in wet cell or AGM configurations despite many years of forecasts predicting major technological breakthroughs in battery construction. Eisboch My little mahogany skiffs with an 8 horse will make a smaller carbon footprint than the electric plants used to charge these things, hopefully when I come here selling them in spring, I get such a warm reception... Just show us pictures and wait for someone to ask if you're selling them. (I'll do it if no one else will.) -- John H- Hide quoted text - - Show quoted text - When I am selling them, you will know Pictures I post are just that,I have not built in over three years. |
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#10
posted to rec.boats
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17' Mahogany runabout just completed
"Eisboch" wrote in message ... "Delburt D" wrote in message news:ILn3j.15376$B21.15016@trndny07... Just for the record, we are using a 15000 watt battery pack that weighs 828 lbs. Add to that the battery cable, 2/0 welding cable, the charger, this is a plug in, Controllers etc. With battery technology what it is today we are lucky to push a nice little light weight hull like ours as much as we can. The future however is looking brighter for much better batteries with higher capacity and much less weight. Where is the high capacity battery technology heading? The last major advancement I am aware of was the development of lithium ion technology but you don't see many of those in really big battery applications. Lithium can also be a bit dicy in terms of handling (or getting wet) if I recall correctly. Seems like we are still stuck in the lead/acid age, either in wet cell or AGM configurations despite many years of forecasts predicting major technological breakthroughs in battery construction. Eisboch Excellent Question! Actually there are several new advancements in Lithium Ion technology. There is a company producing a nano based lithium Ion battery that is half the weight of lead acid and can be charged and discharged in six minute cycles. The batteries are quite expensive right now but they are in production now. These are litteraly bullet proof. The developers have run extreme punishment testing and the only thing that happens is the batteries stop functioning. You would expect this to happen if you shove a metal rod through the caseG There are also Lithium Ion Phosphate batteries that are much lighter and also have no issue with thermal runaway. Large battery packs require battery management systems that control the charge of each cell. Overcharging is the enemy of all batteries. Some of the new battery systems have microprocessors built in that communicate with the main module controlling the overall charge state of the entire bank. There is also a company developing a super capacitor. We have been told by the developer that he will be able to give us 15KW in a 100 lb package down the road. While being a bit more expensive initially this will be a boon to our boat, giving us the ability to either extend the range or performance per charge. Now all that being said. The charge rate of any battery system is limited by the source. A typical dryer outlet , 240V @ 50A equals 12KW. If you have a 60KW pack it will take about five hours to charge regardless of the batteries being charged. These developments are what made us decide to get into this market now. We have plenty of potential customers out there that can use the performance level we now have and as the batteries get better our market will grow. All of the cells I have talked about are either in ramp up production or prototype production showing good success in both areas. Tom |
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