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rx range for fpv flying?

Old 11-24-2009, 06:44 AM
  #1  
huntjulien
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Question rx range for fpv flying?

okay guys i have been seriously researching fpv flying... it looks amazng... im pretty sure when the money comes around i know what i will be purchasing... a 1000mw 1.2ghz or 900mhz transmitter and receiver then make a pan and tilt modd. im expectingthe cam to have a range of around 4 miles...
anyways my question is what rx do i need for that awesome distance. everyone is talking about the cam and its gear but im curious about my rx and tx distance... what are my ranges and for what rx's
ps im getting a dx6i for christmas so maybe something that will work with it???
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Old 11-24-2009, 07:08 PM
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MustangMan
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Assuming you're talking about the R/C receiving to go in the airplane, you're choices with a Spektrum transmitter are pretty limited. Basically you're looking at the AR6200 or AR7000 "full-range" receivers to work with your DX6i. Remember though that most "full-range" R/C equipment is good for about 1 mile.

Remember too that the AMA rules stipulate not flying further than you can see with your unaided eyes. Also, when flying FPV a "spotter" who keeps the plane in view at all times is important in case of any failure that results in loss of the video downlink.
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Old 11-24-2009, 11:09 PM
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huntjulien
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yup i was talking about the r/c receiving... okay thats helpful can i use a non spektrum receiver then? but still use my dx6i? can anyone give me some info or where i can find it on patch antennas for my dx6i?
lastly petleh82 on youtube toldme this abouthis set up
" I have modded my dx6i so i can use a patch antenna on it.. I use AR6200 receiver in my fpv planes, they have a slave receiver and gives good range. I have never gone longer than 3 km away but i think it would be possible to go further."
can anyone explain what a slave receiver is?
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Old 11-25-2009, 01:18 AM
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MustangMan
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If you have a Spektrum transmitter you have to use a Spektrum (or maybe JR) receiver. All the major brands have their own signal encoding streams and none are interoperable with each other.

I have not tried nor have I read of anyone trying to use a directional antenna with their Spektrum radio. I'm sure it's doable though. I believe if you look inside the radio you'll see a small diameter coaxial cable leading from the circuit board up into the antenna. You would need to replace that cable with a comparable cable running to your directional antenna.

The DX6i transmits two independent streams of information and the two receivers in the AR6200 listen to these two streams. The receiver dynamically tries to choose the best signal. 2.4 gHz signals are very "line-of-sight" and subject to multi-path interference. The probability of two signal on two different frequencies being lost at the same time is, however, significantly less so hopefully one good one will get through.
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Old 11-27-2009, 05:18 PM
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pilotpete2
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No RC transmitter such as the DX6i will give you the range you are looking for.
FPV has a lot of cool factor, but flying out of visual range with an RC airplane is a disaster waiting to happen. It's not a question of if something nasty will happen, only a matter of when. Legitimate FPV requires the use of a spotter, so radio range should not be an issue.
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Old 11-28-2009, 12:21 AM
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huntjulien
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hey pilotpete2 thanxfor your advice but to be honest im going to be flying mostly over the prairies till i get really sure im in control. i will be testing it in distance twice of the ones were somebody might be near... i know its still a little dangerous but im going to push my system to its limits in safe area's so i know my boundries then be extra sure by not risking it and probly not goingover 2 miles near civilization... i have heard of making systems to find your plane if you crash and you dont know were because it was to far away... dont worry i will be safe
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