i finally built my own sub! - booyah!

[petn7]

i finally got my first "real" sub up and running! it's a dynamic diver with a hull from CN Models and a home made WTC that's totally removeable for use in other subs. go to this links for some more infor and crude (sorry) pics.

http://www.rcuniverse.com/forum....1921950

[captain nemo12]

That looks good! I have

That looks good! I have a couple of questions]http://www.subcommittee.com/forum/icon_biggrin.gif[/img]

[novagator]

]

[color=#000000]]

[petn7]

bascially i took the CN

bascially i took the CN Models' Alfa plastic model kit (which is in 1/200 scale). this kit is exactly the same as the CN Models Akula plastic model kit which is in 1/280 scale (how convenient). of course the only difference is the sonar pod thingy on the rudder of the akula platic kit. anyhoo, i took the alfa hull and removed the plastic protrusions and compartment on the inside so it was smooth. i made the stern fins out of some scrap plastic and the linkages are some 1mm (i think) servo wire-linkages. i wish i had a better digital camera since a picture is 1K words.

as for the WTC i just took 2 bottles and cut out their ends, then glued them together. the servos inside the WTC are in a little CF box which is epoxied to the inside of the WTC. all electronics can be removed except the servos. if the servoes need to be removed, i might as well make another WTC which isn't hard to do. problem is that it takes about 1 week for the tool dip (red stuff) and silicon glue to fully dry.

oh, and the sub is about 15 inches long

[petn7]

i only tested her in

i only tested her in a bathtub, but she as a very tight turning radius at medium speed. as for diving and surfacing...i'm gonna have to wait a week at least until the neighbor's pool is fixed since it is a dynamic diver, trying to dive at full speed is impossible as i end up getting ventilation

[petn7]

ok, so surfacing is a

ok, so surfacing is a breeze (at least in 10 inches of water) but diving is another story. i can only get the sub to dive if i have the right throttle speed. if it's too fast it ventilates. if it's too slow, te sub can't get enough underwater before ventilation starts again. i assume i'm using the word "ventilation" correctly here. basically the screw is so close to the surfact that is just sprays water everywhere. and of course, i get this spray 9 times out of ten when trying to dive the sub in the bathtub. granted, it is a small space, but this problem needs to be fixed. so what could i do? i've tried adding more weight, but that doesn't help since if it's too heavy, it will sink to the bottom. maybe there's some trick with the trimming and balancing?

[petn7]

ok, so i added weight

ok, so i added weight to my sub so that it was literally "flinking" but still able to float. of course, i was able to dive within my bath tub but at about 30% throttle. i guess this might b the only way to get it to tdive reasonably. and since HDPE is a soft plastic i assume i can't take it down too deep since the pressue will probably shrink the WTC enough keep it at the bottom of the pool.

[captain nemo12]

If she still ventilating? If

If she still ventilating? If the problem persists maybe that depends on details]http://www.subcommittee.com/forum/icon_biggrin.gif[/img] ). 2. Overall balance, is the front heavier then the back? If your sub is free-flooding, might try adding foam.

I bought my Trumpeter Kilo in 1/144 scale and it measures about 19.1 inches, beam]http://www.subcommittee.com/forum/icon_biggrin.gif[/img]

Kilo Construction

[petn7]

no ventilation since i made

no ventilation since i made the sub just barely float. but i can't push the throttle too hard either when trying to dive. oh well, i guess i'm gonna have to just weigh the alfa down. and yes, when the bow goes down, the stern goes up, and w/o enough weight to begin with, the stern stick up out of the water including the dive planes. the sub is perfectly trimmed and balanced. i even tried making the stern extra heavy but that didn't seem to keep the stern down when trying to dive.

[petn7]

i got some better pics

i got some better pics up in case you happen to be interested

[turbobearcat]

I have that very same

I have that very same model I took with me to Indy last year!
I would love to make that sub RC'ed and I have a Seawolf also under the bed that I kept for a rainy day
So I'm wondering if you can send me some pictures of your setup again and what size/type of servos did you use?
Motor speed controller and reciever as well..


Mark

[petn7]

these have alot more info

http://www.rcgroups.com/forums/showthread.php?t=256185


http://www.rcuniverse.com/forum....m

these have alot more info

http://www.rcgroups.com/forums/showthread.php?t=256185

http://www.rcuniverse.com/forum....m

[turbobearcat]

I have some clear tubing

I have some clear tubing that should work, what diameter tube did you use? and whaat electronics did you use as well?

email me ok?

Mark

[petn7]

the answer to the questions

[color=#000000]the answer to the questions you just asked are in those links i posted but in case you missed it]

[turbobearcat]

I like the idea of

I like the idea of the two bottles together, I might have some clear plastic tubing that will work..

The electronis will be another story.

Mark