Two p3s fly at a same location
- Thread starter sajindra
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You shouldn’t have a problem, don’t stand right next to each other.
If your AC is operating on 927mhz and your outside Japan you might be best watching your friend fly before enquiringly with the communication authorities in your region to learn if you might be causing unwelcome interference to complying equipment or amateur radio operators.
If your AC is operating on 927mhz and your outside Japan you might be best watching your friend fly before enquiringly with the communication authorities in your region to learn if you might be causing unwelcome interference to complying equipment or amateur radio operators.
You will be just fine. Even if you both were using the 5.8 RC, the Phantom will only listen and talk to the RC it is paired with. Fly safe and keep your distance between the Phantoms and everyone will go home in one piece.
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You were right. We maintained different altitudes. The gap between the two controllers was approximately 6ft. Suddenly my friend's unit lost the signal(5.8ghz). So his drone managed to RTH and landed safely. But my aircraft was completely fine (927mhz). Then we managed to increase the gap between two controllers. After that, they flew quite nicely
Great news. Curious to know how far out was your friend's Phantom when it lost signal?You were right. We maintained different altitudes. The gap between the two controllers was approximately 6ft. Suddenly my friend's unit lost the signal(5.8ghz). So his drone managed to RTH and landed safely. But my aircraft was completely fine (927mhz). Then we managed to increase the gap between two controllers. After that, they flew quite nicely
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That's not far. Sounds like some interference but apparently you two figured that out. Glad everything went OK after that.
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We have 3 P3S in our club and we have all flown same time at same site ... in fact with more than 10 P3 in the club ... S, A and Pro ..... we have not had any interference or problems between any of them.
We do tend to stand a number of feet away from each other though ... more than when we fly with conventional RC ... no real reason given ... we just do !
Nigel
We do tend to stand a number of feet away from each other though ... more than when we fly with conventional RC ... no real reason given ... we just do !
Nigel
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I'm curious, why did my friend’s ac lose the signal? He said never happened before.
Could have been any number of things too numerous to mention here. Search this forum with key words "Lost Signal" and you will be reading for a week or so.
Quoted for emphasis. Don't stand next to each other. I've seen a thread of a guy whose Phantom suddenly tilted down and accelerated straight into the ground for no particular reason other than he was standing next to his friend who was also flying a Phantom.
That can happen even with an imaginary friend or no friend- worst scenario would be poor video downlink or maybe RTH if signal loss. The AC will ignore control commands that aren’t specifically addressed to it.
It was a thread on the other site. I personally have never seen or heard of anything like that crash where the AC actually tilted down and accelerated into the dirt.
I do know what you mean regarding the stepping and signal encryption.
OK ... DJI do not using Freq hopping as do most other 2.4Ghz / high frequency RC gear ... but it still has an ID code that identifies data strings ... the Rx listens and receives the correct ID ... acts on the data string ....
If the data string is corrupted - then the string is ignored and RX waits for next which follows nano-secs later ... If the RX does not receive sufficient data within a time frame - it enters Failsafe.
If the ID code is not received for such time ... AC enters Failsafe.
Technically the Rx is prevented by the use of the ID code (the Link set-up between a specific RC and AC) from actioning data string from another RC.
Look upon it like you are sitting in the airport with your tablet ... you log on to the WiFi ... that sets an ID between your tablet and the WiFi router. But there are xx other people around you - probably sitting next table or seat from you also logged on ...... does it stop you talking to the wife / girlfriend / office ?
By convention - we do not stand too close to another RC unit - because of 'swamping' ... this is a factor that used to occur rarely but not impossible with older RC ... a brand X radio transmitting on xx channel but stronger signal than brand Y radio on another channel may cause glitches in Y's control of a model. This was before freq hopping ... Its one of the reasons 'Split frequencies in 27Mhz' were often banned in Competitions ...
But I can show videos of 20 or more flyers in a line all flying at same time at shows ... our club has a show routine where all go to flight line ... maybe 2 - 3 ft apart ... launch RC models with ribbon tails to create a panto in the sky.
Nigel
If the data string is corrupted - then the string is ignored and RX waits for next which follows nano-secs later ... If the RX does not receive sufficient data within a time frame - it enters Failsafe.
If the ID code is not received for such time ... AC enters Failsafe.
Technically the Rx is prevented by the use of the ID code (the Link set-up between a specific RC and AC) from actioning data string from another RC.
Look upon it like you are sitting in the airport with your tablet ... you log on to the WiFi ... that sets an ID between your tablet and the WiFi router. But there are xx other people around you - probably sitting next table or seat from you also logged on ...... does it stop you talking to the wife / girlfriend / office ?
By convention - we do not stand too close to another RC unit - because of 'swamping' ... this is a factor that used to occur rarely but not impossible with older RC ... a brand X radio transmitting on xx channel but stronger signal than brand Y radio on another channel may cause glitches in Y's control of a model. This was before freq hopping ... Its one of the reasons 'Split frequencies in 27Mhz' were often banned in Competitions ...
But I can show videos of 20 or more flyers in a line all flying at same time at shows ... our club has a show routine where all go to flight line ... maybe 2 - 3 ft apart ... launch RC models with ribbon tails to create a panto in the sky.
Nigel
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