Hello

I'm just wondering what is the max depth we can control a sub at, given a classical stock receiver antenna inside a sub hull.

thx

Max depth should be around 5 feet ( 1.5m) only due to the radio. radio signal penetration through water is difficult at best. Higher frequencies will work better than lower freq. The only real way to get around this is to boost the output of the Tx (the real question though, is how legal it is where you are.) a dynamic diver shold have fewer problems, unless it is so close to being neutrally boyant, that it sinks once under. If you are doing a ballast tank sys, I would suggest making the ballast system a 'dead man' - one that blows the ballast tanks when the radio stick is at neutral. That way (if the ballast is an 'active' radio function - meaning you would have to keep your finger on the stick) when the radio goes 'dead' (or out of range) the ballast blows, and she surfaces.

dogmoat,

thx for your input. 5 ft is really not a lot. You mean there might be a difference between 41 MHz and 72MHz ? To what extent ?

I plan using static diving, and the failsafe feature of my Tx will do the job. Don't want to lose my sub

"Max depth should be around 5 feet ( 1.5m) only due to the radio. radio signal penetration through water is difficult at best."

Not true. In relatively clean fresh water, I've seen boats go in excess of 30 feet without losing signal. Read "clean" as free from chemicals more than dirt. Obviously, there are chemicals in pool water so depth is limited there.


"Higher frequencies will work better than lower freq."

Wrong. It's the other way around. Lower frequencies penetrate water better than higher frequencies.


The above refers to standard R/C systems (Futaba, JR, Hitec, Airtronics, etc.) NOT Radio Shack type "toy" radios.

Skip Asay

thx Skip ! [sm=thumbup.gif]

Is sea considered as full of chemicals (salt,...) ?

salt is one componet that will severly limit transmission

Junglelord is correct. Salt water is a no-no. While fresh water depth can be measured in feet, salt water is, at best, measured in inches.

Skip Asay