Wet/Dry Battery Packs - What is the best ways

[niterdr]

I am currently working on 2 static diving subs, a Revell VIIc and my own design camera equipt explorer. It has been many years since I built my first sub, a dry hull dynamic diving RC shark fin If I remember correctly I built it while one of the Jaws movies was still showing at the theatre. The sub still runs but has been in drydock for a few years. With all of the new technology now there is so much to learn.

On the VIIc I am using one of Dave Welsh's WTC kits and I plan to use either Li-ion or Li-poly battery pack.
With the Explorer sub I am going to use a regular NiCad or NiMh 6 cell pack.
Not wanting a pair of bombs I am going to have the packs outside of the WTC in both cases. I am wondering if anybody has had success with Locktite's Tool Dip for waterproofing Li-Ion or Li-Poly packs and if anyone has been able to make a seperate 6 cell wtc or should I run the 6 cell pack wet.

Alex



Edited By niterdr on 1153587839

[tmsmalley]

Hi Alex - Not sure

Hi Alex - Not sure of getting the LiPo packs wet... maybe a separate dry enclosure would be best. I did that with my NiMh pack for my Hunley. Just took a short length of lexan tube, cut some lexan circles and RTVed them onto the ends with the packs sealed inside. Added a couple of SS terminals screwed and sealed through the end and a couple of holes sealed with nylon screws that I could open to vent gasses while charging.

Do you have any photos of your shark fin? I have always wanted to do something like that!

What did you use to make your shark fin? What power? Any ballast system? Steering? Inquiring minds want to know!

[niterdr]

Photo's I have and will

Photo's I have and will up them when I get my SC web space setup. The fin was made using the "lost foam" technique. White Styrofoam was used to get the shape, covered that with 1/64th ply using water based contact cement, fiberglass cloth and polyester resin was then used to hold the shape. Once that was dry just acetone the foam and install a vent at the top of the fin and voila! Powered with a 550 geared motor for lots of speed in a very simple dynamic diving hull with a tailfin for steering and you have a model that really draws attention

[tmsmalley]

I love it! Can't wait

I love it! Can't wait to see the photos. I think Norbert Bruggen did one a number of years ago and I have always wanted to try one after that...

[tabledancer]

I run a lith/ion 7.2v

I run a lith/ion 7.2v in my Revell Type VII"wet"enclosed in a ballon and sealed with RTV.No problems just keep it dry.
TD

[anonymous]

TD is right. I run

TD is right. I run mine wet. No problems at all. If you were running in sea water that may be different. And that is in my type 7 too. I don't even use the balloon.

Steve

http://sneill.com/uboat/type7_2.wmv

[niterdr]

Ok here is a sneak

Ok here is a sneak peek at the Shark Fin!

I will be taking more photo's of the fin shortly as well as my other projects, I might even be tempted to do a build on my camera/explorer sub I am working on.



Alex



Edited By niterdr on 1153878704

[Guest]

so with nimhi batteries it

so with nimhi batteries it should be ok with the batteries dry in a bag, but the terminals exposed to water , is that right?

[tabledancer]

I waterproof all my terminals

I waterproof all my terminals with "Permatex Dielectric Tuneup Grease for all my wet connections.I don`t know if it`s needed but it makes sense to me,if nothing else it keeps the corosion away.
TD