1/96 Aluminaut Submarine by Scale Model Castings - Page 9 - RC Groups
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Jan 30, 2013, 08:57 PM
Thanks, Tom!! Will definitely keeo you posted as I progress!
Really like your choice of "goodies" for this build!! Makes it so much more appealing to those a bit too squimish to undertake such "frivolity"!! LOL
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Jan 31, 2013, 02:00 AM
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tchalfant's Avatar
I cannot take credit for the goodies, I learned about my Sombra Labs RX from forum.sub-driver.com - And my servo tester was inspired by the one that David Merriman used (although the one we own is much nicer looking - don't tell David he is a sensitive type LOL) and David showed the value in having a tester in one of his Cabal reports (or posting - getting old - not sure). I was pointed to a piston ballast system by Rick (the person I got the Aluminaut from) and just hacked around with different ideas.
Then there are those here and other sites that inspire me. As an example, ken_nj and his Marlin WIP. There are things he is doing that is inspiring me to try new things, some I will file away for later use. Good stuff.
Jan 31, 2013, 07:32 AM
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HeavyCruser9's Avatar
Cool build !! Hasegawa just released (Nov last year) a 1/72 Research sub !! Would love to see some one build a working one!!

Cheers Bruce
Feb 03, 2013, 04:18 AM
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tchalfant's Avatar
Bruce, I looked up that research sub, 5.4" long.....your killing me. I think it can be done. Must resist.........
You will see in this post that these ESCs are so small that I am able to pack them in the aft end of the sub - this really gives me room to put the ballast in and the rx.
I tested the little ESCs again because I did not check if they reversed or not. That would be a big mistake. Well it does go forward and backwards. The prop tracked straight - the pour shaft (which is still attached) waved wildly.
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Made a means to bring in water - I could have taken an easy route and just used a straight pipe, but I opted to make it curve in.
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Sealed the tube in with RTV silicon rubber. I will also use marine epoxy inside. Once the sealer dries, the tube will trimmed flush.
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I coated the ESCs in liquid electricians tape because these were going to be stacked on top of each other. Once the liquid tape dried, the ESCs were bound together and given another coat of liquid tape to seal them as one nice package. And that package fits all the way in the aft end of the sub!
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Last edited by tchalfant; Feb 03, 2013 at 04:48 AM.
Feb 03, 2013, 08:00 PM
derk's Avatar
very cool, i might have to get some of those esc's and other items from bidproduct.
i started another overambitious project over in the micro boats section.... but its going to be super simple so should be a straightforward build
Feb 05, 2013, 02:23 AM
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tchalfant's Avatar
Excellent Derk!
Filled around the brass tube with marine epoxy.
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Pushed the ESCs back into the aft portion of the hull.
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Took the Lepton 6 Servo out of it's box.
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and coated it with liquid tape.
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Carved out a notch on each side for the main board of RX to fit in. (Note: I painted the wire colors on the side for reference)
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Nice fit.
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Feb 06, 2013, 01:25 AM
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tchalfant's Avatar
The ballast fits nicer than I thought. Man life is good!
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Until you realize there is no way with this setup I can connect the servos.....
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what to do......
Feb 06, 2013, 04:45 AM
derk's Avatar
you could make a wiring harness so everything shares power and just the signal sockets and 2 power connections go to the receiver. if you really needed to, you could shorten the receiver pins and use shorter sockets on the wires too, but then its limited for use later on.
Feb 06, 2013, 11:52 AM
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tchalfant's Avatar
derk, I like your thinking! there are three thoughts going through my mind, one a harness like you described, I can flip the piston which interestingly offers an offset arrangement, or I could trim the pins (or replace the pins and make a vertical pin arrangement). Decisions.....
Feb 07, 2013, 03:45 AM
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tchalfant's Avatar
derk, your idea won out. Originally, I thought of running wires, but did not think of using a common power and ground, just run the signal wires separate. That was a stroke of brilliance on your part. Thank you very much! My wiring went from 12 wires down to 6. As you can see wires begin to take up a lot of room. Thinner gauge would help, but the need to run fewer a big space saver. Still need a battery in there.
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You can see that there could be as much as maybe 8mm in room if I trimmed the water inlet tube and the syringe nipple. The risk is the vinyl tube that connects the two will get dislodged by the piston ejecting water. So, it is there if I need to get drastic.
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No matter all that needs to be done to free up space there are some things that have to be installed. One of those things are some support for the components and a means to tie them down.
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Feb 07, 2013, 03:55 AM
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tchalfant's Avatar
Originally Posted by tsenecal
i highly recommend sombralabs for the receiver, if it will fit.

i have owned a 4 channel pico GWS, and now have 2 lepton6, 6 sl8, and 2 shadow7s (sl8 predecessor).

the GWS 4 channel receiver is smaller than the lepton6, but is a single conversion radio. in my SWM blueback, it was a very glitchy setup. an added bonus with the sombralabs is the programability of failsafes for all channels using their shadow programmer.

for a complete run-down on what is available from sombralabs:

tsenecal, I am sorry, I missed your post. Thank you for the information! We have a common friend in Denver and he speaks very highly of you. Hopefully, I will get a chance to meet you at one of the regattas up in Denver.

I recently found out that Sombra Labs will stop making 72/75 Mhz RX.
So, to all wanting to get one, better stock up now. I believe Mike Caswell (sub-driver.com) has some http://www.sub-driver.com/electronic...receivers.html
If you know of other sources please post!
Feb 11, 2013, 01:31 AM
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tchalfant's Avatar
Been a busy weekend, but not on subs.
Secured the RX to the framework and tested the fit - it fit!
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Began working on the wire harness and found out heat and the plastic holder do not mix. So, I learned to be a little more careful. I painted white on it to mark the channels the wires go to.
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I got this Polk transmitter for my son. Trying to understand it.
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Anyone know how to mix the throttle (Channel 3) with the rudder (Channel 1)? Reading the manual is hurting my brain!
Feb 12, 2013, 01:58 PM
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tchalfant's Avatar
Tried to shorten the servo connector to the reciever to see if that would help.
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And it did not. Missed it by that much.
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So went for a direct solder to the female pin.
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Tht worked. I have a plan of action now!
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Feb 13, 2013, 03:59 AM
derk's Avatar
on my mini sub, i skipped cutting the housing and went straight to soldered female pins and heat shrink

not much left to do on her now right? nearing maiden voyage?
Feb 13, 2013, 09:39 AM
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tchalfant's Avatar
It is a learning curve for me. The only thing preventing me from finishing is getting the bench time. I am hoping this weekend, but the days are already getting filled up!

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