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Author Topic: use of 2.4Ghz on a r/c submarine  (Read 3573 times)

gyronuts

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use of 2.4Ghz on a r/c submarine
« on: June 05, 2009, 03:14:59 pm »

Hi,
    It is said that 2.4 ghz does not work on subs. however, I intend to mainly cruise on the surface with the odd run with the conning tower in view and maybe even a quick submerge to about 6".
Has anyone actually tried a spektrum  set up in such a sub?
If so what happened.
If it goes into failsafe the dynamic diver must shut off power and surface surely?
All views welcomed.
Thanks. Bill
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alan colson

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Re: use of 2.4Ghz on a r/c submarine
« Reply #1 on: June 05, 2009, 03:54:10 pm »

I have also heard that 2.4 Ghz radio does not work under water and it could be an expensive exercise trying it out your way.
Alan
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amdaylight

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Re: use of 2.4Ghz on a r/c submarine
« Reply #2 on: June 05, 2009, 04:10:36 pm »

If the sub always stays surfaced, no problems but (and we all knew a but was coming) the minuet that the sub goes under water the 2.4 WILL NOT WORK. The wave length of the radio is to short to penetrate the water. If you are going to build a sub use an FM radio and use the 2.4 on the surface. I have two radios one for the surface and one for my subs. Remember even the FM will not work in salt water or heavily chlorinated pools. For more information on this I would suggest you either go to either the Sub Pirates or The Sub Committee's web sites.

Sub Pirates ( http://www.subpirates.com/index.php )
The Sub Committee ( http://s181686668.onlinehome.us/phpBB2/messageboards.php5 )

Andre
over yonder in Portland Oregon
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wideawake

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Re: use of 2.4Ghz on a r/c submarine
« Reply #3 on: June 06, 2009, 06:17:38 pm »

When I did my tests on a DX6, I couldn't get a signal through 12 inches of water with the TX 4 feet from the submerged test rig  :((

If it did work, microwave ovens wouldn't work.  On the whole I'm not sure which is the biggest loss to humanity  :-)

You'd be OK trimmed down so just the conning tower was above water if you mounted the RX (or second receiver with those systems) at the top of the conning tower.   However I'm not sure what benefit you'd gain over simply using a 40MHz set.

HTH

Guy
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Mankster

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Re: use of 2.4Ghz on a r/c submarine
« Reply #4 on: June 06, 2009, 07:29:03 pm »

It pretty hard to controll a dynamic diver with the precision you want. What type of sub are you running? If its a WWII variety you going to need to ballast it down to decks awash on the surfave to drive it the way you describe. Any higher on the surface and you will need some speed to get it to submerge. You not going to be able to keep it at just 6". Any change of speed is like to afftect the depth you hold. You may need to reverese out of trouble (stuck in the mud on the bed, weeds and foreign objects that find their way into lakes and ponds) to get back to the surface; wont happen if you have no signal. Best stick with 40Mhz for subs.

Ghost in the shell

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Re: use of 2.4Ghz on a r/c submarine
« Reply #5 on: July 15, 2009, 05:31:41 pm »

When I did my tests on a DX6, I couldn't get a signal through 12 inches of water with the TX 4 feet from the submerged test rig  :((

If it did work, microwave ovens wouldn't work.  On the whole I'm not sure which is the biggest loss to humanity  :-)

You'd be OK trimmed down so just the conning tower was above water if you mounted the RX (or second receiver with those systems) at the top of the conning tower.   However I'm not sure what benefit you'd gain over simply using a 40MHz set.

HTH

Guy
no put you'd be able to cook the pie by stabbing it with the radio's tx and turning it on
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