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Skipjack the antenna goes along the side of the piston back to front and returns.
antenna is the yellow wire.
Akula II is the same other than it is a dry hull.
The antenna is in the clear/white U bent tube along the side from the rear compartment to the front and back.
George Washngton antenna is wrapped on a flat piece of 1/16" sheet plastic sort of a coil so the antenna wire does not cross itself. Itis all in the rear compartment.
The antenna is in the rear compartment wrapped around the plsatic sheet.
Sorry the photo does show it.
This boat is only 3" in diameter and the rear cylinder is 1.5" in diameter.
The Gato will have the antenna in the rear compartment simular to the GW.
This is the antenna on the plastic sheep piece.
This was how it was during the first water trials.
The cylinder is currently disassembled for ballast system change from water pump to air pumps.
For antennas that come out of the cylinder, Mike or Will can help with that.
Mike when he first started bilding/running submarines it was in salt water and his boats reqired the antenna to be above the water surface to work at all.
I typically run them outside. This allows for full-length extension and maximum separation from any noisy electronics inside the cylinder. If you put it in a small diameter rubber tube, this also gives you a method to test the cylinder for leaks. You unplug the end, submerge your cylinder and blow into the tube. You can easily spot any leaks that are there, and precisely where they are.
The Nautilus Drydocks - Exceptional Products for the World of R/C Submarines - www.nautilusdrydocks.com
Bob,
My builds all have a Schreader Valve on the front end cap.
I have a hose with the threaded fitting on it to do exactly what you are doing.
The Schreader has no inside parts.
I also make a brass rod hook that I can reach through the Schreader to reach the on/off switch.
The Schreader most importantly lets me take the valve cap off for transportation up and down the 5000' I have to travel to the lake.
Forgot once and the end cap popped off and scared me while driving up the hill.
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Farlan,
Inside or Outside depends on how you want it to be.
Both ways work.
Inside requires a little placement design to limit the electrical noise of the motors. (brushed)
Outside requires another fitting through an end cap. (outside allows you to run in electrically dirty water (brackish or salt) as long as the antenna is 1/2" or more above the surface)
Farland,
I am not sure how it applies to our frequency, but in networking, wood (including books) can absorb or severely impact radio signals. Now to qualify that, it is in GHz range and not our MHz range. So, my point is I do not know how well the dowels ill or will not impact the frequency. However, in your testing, if range is poor, keep this as something to consider.
Maybe on of our electronic experts can tell me I am full of stuff or corroborate what I am saying.
Peace,
Tom
If you can cut, drill, saw, hit things and swear a lot, you're well on the way to building a working model sub.
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