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Old Sep 05, 2012, 07:00 PM
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War Fish's Avatar
USA, TX, Cypress
Joined Aug 2005
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Nicely done, Tom. Good turning radius and flat periscope runs. Sweet!
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Old Sep 05, 2012, 07:42 PM
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United States, NV, Las Vegas
Joined Aug 2011
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Thanks Paul.....there is a story that I will share later. Or as the old radioshow would say " and now for the rest of the story"
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Old Sep 05, 2012, 09:05 PM
Shanghai'd Expat
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Xiaoshan, China
Joined Jun 2006
4,536 Posts
Looks great! Considering the long patrols those fleet boats saw, I'd not be shy when it comes to weathering one.
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Old Sep 05, 2012, 09:12 PM
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United States, NV, Las Vegas
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Thanks herrmill! Checking out pictures I saw the spectrum of the condition the Gato/Balao subs were in.
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Old Sep 06, 2012, 09:10 AM
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United States, GA, Marietta
Joined May 2012
12 Posts
Great Job I really like the way you set up for soldering. I made a wooden jig and used that to solder to, but your way looks easier. What did you use kids modeling clay? How about some pictures of the WTC tech tray. Keep up the outstanding work.
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Old Sep 07, 2012, 01:06 AM
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United States, NV, Las Vegas
Joined Aug 2011
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Thank you! The clay I used is potters clay - the kind used for making pots/bowls/vases. What is cool about it is I can throw it in water and it will soften up for reuse. It takes the heat well. Press the plastic piece into the clay, shape it to prevent distortions to the plastic and let it dry.
I will post pictures of the tray hopefully this weekend - don't make fun of my rats nest of wires!
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Old Sep 20, 2012, 07:33 PM
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United States, NV, Las Vegas
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On my video, the last run here is how she looked.
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The rear end just was negative buoyant.

So I tried many different things and I had a hint what I thought it was. The WTC was dry, there were no bubbles or air in the ballast tank when flooded. The final test was to let it sit in water and see what happened.
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Yes, it did exactly what I had a hunch it would do. As time goes by, my Gato seemed to change its buoyancy from being positive to negative.
Here is my suspicion:
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air behind my foam.........
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Old Oct 03, 2012, 11:21 AM
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United States, NV, Las Vegas
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Had a much better day this past weekend (the sub did not end up at the bottom of the pool!), but towards the end of the sub time, the aft end began acting sill and dipping down once it was moving forward. However at all stop, the sub was level! Since last time I posted, I let the sub get completely saturated in the kiddie pool, er, I mean test tank. Then re-trimmed her. Re-tested her a few days later and she stayed at proper trim after several hours.
I was just informed that it might be the BEC in the Mtroniks ESC. The load in the Gato is higher than designed and it over heats causing issues.The suggestion is to use a separate BEC - I will try that.


Getting closer to solving the running issues I have - I let the sub stay in the pool a while to allow the trapped air to come out. She began by giving me a hard time to dive, but after a while everything was dialed in and she performed great. It was later on the the crazy issues popped up (as mentioned earlier). Here are a couple photos.
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My son even got a chance to control the Gato. He did a great job and the sub responded well to his commands.

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Fun!
A good day with the Gato.
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Old Oct 27, 2012, 02:13 PM
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In the past few months I have broken, bent, dislodged, and lost parts on my Gato. Usually small parts or delicate parts. One of the items that I have yet to put on tis the periscopes. These are very delicate that equals very breakable to me.
So when I made my SNORT tube holder, I added the two periscopes.
You can see the aluminum holder here:
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When I did the original casting for the WTC, I did not use the pressure pot. The periscopes came out o.k., but there were a lot of bubbles and hollow areas.
Last night I brought out the pressure pot and recast the scopes.
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The base of the scopes are larger than the brass I used so I needed to file and sand it down.
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I will work on a way to still get air in with the scope tops installed.

My BEC came in this past week and I will install in tonight. Maybe I can sail the Gato again tomorrow.
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Old Oct 27, 2012, 05:01 PM
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Can anyone tell me about periscopes. Did the Gato usually use both scopes? I see some model boats have one scope higher than another, but would the sub actually do that?
Any help would be appreciated!
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Old Oct 28, 2012, 03:12 AM
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Philippines
Joined Jan 2005
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One technique I saw for making hollow periscopes/ gun barrel used telescoping brass tubing solder to the correct length and the spaces in between filled with epoxy or bondo which was sanded down to achieve the tapered look.
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Old Oct 28, 2012, 01:27 PM
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United States, NV, Las Vegas
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Thanks for the suggestion. The smallest diameter brass tube I have the opening is minuscule. The wall thickness is too great. A basting needle might work.
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Old Oct 29, 2012, 01:33 PM
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United States, NV, Las Vegas
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The replacement of the BEC is pretty straight forward. I tapped into the main power lines from the battery. The mtroniks power line needs to be disabled or issues can surface.
There is th tab pointed out here:
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Lift the tab with something pointy, needle or tweezers. Pull the red cable out.
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You should have this!
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For me this is better than cutting the line.
Taped the red cable back to prevent the possibility of it touching anything.

Tested and it worked. Next test in pool again.......
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Old Nov 26, 2012, 03:30 PM
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I had cast the periscope and hollowed it out.
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After I had it drilled out I opened an area at the back to allow air in. Since the scope will be painted black, it should hide the opening.

I went to make a mold of this (because of war damage and Godzilla like moves by me) and cast a few periscopes to have on hand. Well, that was the plan, first cast and the bottom tore out of the periscope. I will try a new mold.
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Old Nov 29, 2012, 10:46 AM
Just Limin'
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United States, NJ, East Brunswick
Joined Nov 2008
1,321 Posts
Tom,

Starting to build my Gato now. Inoticed the decks don't seem to line up. If I put all 3 on as dry fit I have gap between the middle deck and the aft deck , or if I correct that I have a gap between the middle and foredeck. Did you also experience this?

BTW, nice build looks great in the water.


Scott
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