Bob
Commander
Posts:601
 | | 29 Jul 2009 09:02 AM | | The 12 amp hour 6 volt SLAs I had ran my Warspite from 2004 until this year. I got a lot of battles out of them until they went bad.
SLA's power curve drops slowly over time. NIMH stays at the same voltage then drops off very fast. I a battle you will not notice that you're slowing down and losing voltage with SLAs. With a Nimh you are suddenly dead in the water. But that takes a long time with both types. If you have enough power in your ship.
When you make your own pack you do solder the tabs togther. 5 cells makes 6 volts.
Dave's ID did have just a little bit of freeboard. If you go SLAs you just have to make the total weight of the ship the same as Dave's. Dave how much did your ship weigh? | | | |
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Ragresen
Lieutenant
Posts:333
| | 29 Jul 2009 09:03 AM | | Yes you do, but keep in mind you need to use connecting bars and unless you are good at Soldering I would not do it. You can actually ruin a battery if you add too much heat to one. | | Member MWC #285
Southeast Attack Squadron
SMS Kron Prinz Wilhelm (Battle Ready)
USS Des Moines (shipyards)
DKM Prinz Eugen (Keel Laid) | |
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Iunnrais
Veteran
Midshipman
Posts:31
| | 29 Jul 2009 09:15 AM | | She does float a bit low in the water. I marked mine at 23.5lbs and she came out at 1 7/16" at the bow and 3/4" at the stern when floated. I'll likely try to bring the bow up a little more. BTW, it is very easy to take out the extra bit that got molded into the bow.
http://picasaweb.google.com/iunnrais/IronDuke?authkey=Gv1sRgCMe-8pHknfbTXg&feat=directlink | | | |
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Dave
Ensign
Posts:129
| | 29 Jul 2009 01:03 PM | | Would something like this work:
http://www.batteryspace.com/index.asp?PageAction=VIEWPROD&ProdID=1158
It says it has 5 Ah (??) of capacity at 1.2v. Couldn't I just make a single pack of 5 of those to power the entire ship? | | | |
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djranier
Rear Admiral (RDML)
Posts:1447
| | 29 Jul 2009 09:15 PM | | At Nats, it weighed 24.6 pounds. But would be better if it dropped a pound or so I think. But it was harder to hit sitting low in the water like it was. But it does look like a smaller Nagato siting low like it was. It takes water over the bow alot, I found that out to my detriment at its first battle in Savannah, it sank just about every battle taking on water over the bow and stern, due to the poor deck seal, and the pump that refused to quit clogging up. By Nats I had it all figured out, and it did much better. | | | Its better to give than to receive.
Southeast Attack Squadron | |
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bb26
Rear Admiral (RDML)
Posts:1642
| | 29 Jul 2009 09:47 PM | | I saw one at the IRCWCC NATS and it looked great. Very hard to hit with how low it sat in the water. Good ship. The hull looks good | | | Just when you think you know the answers, I change the questions. | |
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djranier
Rear Admiral (RDML)
Posts:1447
| | 29 Jul 2009 10:26 PM | | Here is a fantastic deal on D, 10 amp cells on ebay. Where I got most of my batteries. 20 cells with tabs, for $99. Thats the best price I have ever seen on these cells. You can make up 4, 6v packs. Only 22 hours left on them at that price.
http://cgi.ebay.com/20-pcs-of-D-Size-10000mAh-NiMH-Battery-Flat-Top-w-Tab_W0QQitemZ390048787667QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item5ad0b82cd3&_trksid=p4634.c0.m14.l1262 | | | Its better to give than to receive.
Southeast Attack Squadron | |
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Dave
Ensign
Posts:129
| | 30 Jul 2009 10:07 AM | | When the cells are combined in series, do the five cells together have 10 Ah of capacity, or would they have the combined power of 25 Ah? | | | |
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Gardengnome
Ensign
Posts:182
| | 30 Jul 2009 12:11 PM | | Posted By Dave on 30 Jul 2009 10:07 AM
When the cells are combined in series, do the five cells together have 10 Ah of capacity, or would they have the combined power of 25 Ah? Depends on the cell type.. but hypothetically if 5 1.2v 10000 mah cells were combined in series it would be a 6v 10000mah pack. To get 20000 mah you need to make a second pack of 5 1.2v 10000 mah cells in series. Then take the two packs and combine them in parrallel if I remember correctly to get your 20 ah.
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djranier
Rear Admiral (RDML)
Posts:1447
| | 30 Jul 2009 04:32 PM | | 5 cells would have the 10 amp capacity, run 2 packs in parallel, and you would have 20, and so on. | | | Its better to give than to receive.
Southeast Attack Squadron | |
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Dave
Ensign
Posts:129
| | 01 Aug 2009 11:38 AM | | 
I finally figured out how to get the pictures off our camera. Here is the subdeck, glued in and sealed with west system. I like the way the "planking" turned out, but it isn't as smooth as I wanted it. I'm waiting to cut out the main windows for last, to make it easier to balance all the hardware in there, I have already cut out the small ones that go on the casemates. Since I took the picture I have also installed the drive motors and gear boxes. 
Here are the screws and rudders, I was able to get them pretty close together (on the second try!) 
This is about as far as I have gotten on the superstructure. My plan is to hollow these out to save weight, then maybe build the upper superstructure with ABS or 1/8" plywood. | | | |
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Iceman
Rear Admiral (RDML)
Posts:1186
| | 01 Aug 2009 01:38 PM | | Very nice so far!!!!!!!!! | | Rob A.
USS Alabama
USS Arizona
USS Saratoga
DKM Bismarck
USS John Brown
http://groups.yahoo.com/group/NYBG/ | |
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Dave
Ensign
Posts:129
| | 03 Aug 2009 10:21 PM | | I built the conning tower, and am working on the tripod mast, but the other day my last saw blade broke, so it will have to wait until I can get back to the hardware store. | | | |
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bb26
Rear Admiral (RDML)
Posts:1642
| | 03 Aug 2009 11:10 PM | | Looking good. | | | Just when you think you know the answers, I change the questions. | |
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Stokamoto
Stokomoto
Vice Admiral
Posts:3730
| | 04 Aug 2009 10:33 PM | | Nice going so far. Looking great. | | | |
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Dave
Ensign
Posts:129
| | 05 Aug 2009 10:52 PM | | 
Here is the railing I made for the conning tower. The picture is kind of blurry, but it is made of wire soldered together, and solidified with CA. It should look better once I glass over the sides. 
Here is what she looks like so far. The batteries came today, they are the 10 Ah NimH's. I have 20 cells, but I don't actually know how to make them into a pack. Do you just solder them together in series (they have tabs) then tape over the pack? | | | |
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Bob
Commander
Posts:601
| | 06 Aug 2009 08:49 AM | | "Do you just solder them together in series (they have tabs) then tape over the pack?"
That's pretty much it. I don't tape over them. I put heat shrink over them.
Make sure you have a good soldering iron. Putting too mush heat on the cel is very bad. You want pretin each tabe, then heat them fast when putting them together. | | | |
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Dave
Ensign
Posts:129
| | 06 Aug 2009 12:35 PM | | Where do you get the heat shrink? | | | |
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Bob
Commander
Posts:601
| | 06 Aug 2009 01:20 PM | | Localy I get it at Axeman Surplus Store. They have all kinds of misc electronics junk. There should be a Surplus Store in your area like it.
I think a place like Radio Shack would have it. But you'd pay a lot more for it.
I don't think Home Depot or Lowes has it.
Otherwise the web will have some on a site. You need pretty big stuff. I think I had 4" or 5" | | | |
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Dave
Ensign
Posts:129
| | 06 Aug 2009 11:37 PM | | Do you mean each heatshrink each cell individually, like with the tube type, or make a case out of it, like you see on the store bought packs? | | | |
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