2.4's and water?
09-15-2011, 01:54 PM
#1
Thread Starter
2.4's and water?
anyone else have issues with their 2.4ghz radio when the crawler goes under water?
im not talking about a splash, i mean fully submersed.
my buddy had a wraith with stock 2.4, and i have had a crawler with a flysky 2.4.
both of our radios would lose signal as soon as the truck got fully under water.
pull the truck out and they work fine again. RX's are in waterproof boxes naturally.
this doesnt happen with my traxxas AM or the stock axial AM(or FM) radio. no loss of signal, truck just keeps on going.
2.4 is supposed to be better, but it seems like this is one limitation....the signal dont go threw water.
im not talking about a splash, i mean fully submersed.
my buddy had a wraith with stock 2.4, and i have had a crawler with a flysky 2.4.
both of our radios would lose signal as soon as the truck got fully under water.
pull the truck out and they work fine again. RX's are in waterproof boxes naturally.
this doesnt happen with my traxxas AM or the stock axial AM(or FM) radio. no loss of signal, truck just keeps on going.
2.4 is supposed to be better, but it seems like this is one limitation....the signal dont go threw water.
09-15-2011, 02:31 PM
#2
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RE: 2.4's and water?
2.4Ghz frequency has a problem with penetrating water. If you check out Spektrum's website, the specifically state which radios/receivers are marine compatible. I think most of Spektrum's current stuff is marine compatible.
In a boat, I think the trick to it is that the receiver has two antennas so that no matter how it's situated in the water, one antenna is always above the water line.
In a boat, I think the trick to it is that the receiver has two antennas so that no matter how it's situated in the water, one antenna is always above the water line.
09-15-2011, 02:56 PM
#3
Thread Starter
RE: 2.4's and water?
OK. i wondered if it was just that the flysky and axial 2.4's were really cheap or something.
i wouldnt think boats would have a problem, as they stay above the water.
our crawlers would work fine until they got more than 1/2 inch of water over the top of them.
i wouldnt think boats would have a problem, as they stay above the water.
our crawlers would work fine until they got more than 1/2 inch of water over the top of them.
09-16-2011, 02:48 PM
#4
RE: 2.4's and water?
agree with K_B
High frequency's do not penetrate water very well due to the radio waves not propagating as well in the water due the extra resistance, as they do in air. Its kinda like how you can move with less effort when walking on land then you can as you get deeper, and deeper into water
Under water RC's is one VERY good reason to keep AM radios handy
I've had my one RC Sub under 5 feet of water, and still had full control.
High frequency's do not penetrate water very well due to the radio waves not propagating as well in the water due the extra resistance, as they do in air. Its kinda like how you can move with less effort when walking on land then you can as you get deeper, and deeper into water
Under water RC's is one VERY good reason to keep AM radios handy
I've had my one RC Sub under 5 feet of water, and still had full control.
09-17-2011, 07:36 PM
#5
Moderator
RE: 2.4's and water?
Futaba FASST works a lot better than spektrum when it comes to water. In RC boating people always use futaba. However, when underwater (as in the case of submarines) FM is the only reliable signal.
09-19-2011, 03:53 AM
#6
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RE: 2.4's and water?
ORIGINAL: SyCo_VeNoM
agree with K_B
High frequency's do not penetrate water very well due to the radio waves not propagating as well in the water due the extra resistance, as they do in air. Its kinda like how you can move with less effort when walking on land then you can as you get deeper, and deeper into water
Under water RC's is one VERY good reason to keep AM radios handy
I've had my one RC Sub under 5 feet of water, and still had full control.
agree with K_B
High frequency's do not penetrate water very well due to the radio waves not propagating as well in the water due the extra resistance, as they do in air. Its kinda like how you can move with less effort when walking on land then you can as you get deeper, and deeper into water
Under water RC's is one VERY good reason to keep AM radios handy
I've had my one RC Sub under 5 feet of water, and still had full control.
Same as cellular networks.....GSM900 penetrates better than GSM1800 which penetrates better than 3G which is also in the 2.4GHz band! I am mainly refering to building penetration but the same example could be applied for water........he he....anyone tried using their mobile under water
