Mayday! Mayday! I tested the FPV system on the Raptor140B, with nearly disastrous results. Luckily, the APM was onboard to save the day!
I added the 400mw 1.3Ghz FPV transmitter to the 140B, and took it for a test flight. Right after take off I had significant control issues, and barely recovered the airplane. Thinking it may have been the flight controller, and wanting to determine the cause while the same circumstances were available, I double checked all connections and systems, and flew the aircraft again.
Again, it had significant control issues, even in manual modes. Luckily, the APM flight controller was able to safely loiter the airplane overhead while I determined that indeed the Turnigy 9x transmitter was no longer able to safely control the airplane.
This required me to create a mission mid flight, update the mission, update flight parameters, and attempt an autolanding, the first time I've tried this feature.
Watch the find out the results!
-Trent
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I'd try extending the FPV ant. out away from the box to put it at the other wingtip that way you can keep your GPS ant. centered in the main body to the front of the airframe.
Just my thoughts. Glad it all came out well in the end.
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So as I see it you having a 400 mW transmitter screaming right into the ear of your control Rx, which being a Turnigy 9x is roundabout 100 mW and not the most bulletproof protocol either (dont get me wrong I absolutely love 9x, its value for the money cannot be beaten), now there is your problem, to make things worst both are lineary polarized, so the signal can enter with full strength and you were sitting inside a car.. big no-no, that sheet of steel between you and the airplane is a serious violation of the frenell zone.
If you would take my advise on this, watch IBCrazy-s fvp tutorial videos, and take his points to heart, than you will have a good time flying fpv.
I had smilar issues in the past, Vtx 1.2 control 2.4, it basically reduced the range of my 9x to less than a 100 meters, and I had waay bigger separation than you do, also move the antennas away from soruces of noise like ESC, Motor, and power wires.
If you wanna stick to 1.3 you will need 433 Mhz or 35Mhz for control, I've put an orange OpenLrs into mine 9x, and I love it, when combined with ER9x you can set up everything, the possibilities are endless!
If wanna stick with 2.4 control than move to 5.8 for video, those two has no interference whatsover, no matter how close they are, but the range is much-much less than with 1.3 and 433, also with 5.8 circular polarization is an absolute must!!
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I have a EZUHF I'll be implementing on this set up, I was going to wait, but not anymore! Full speed ahead on that!
Thank you for the info and tips!
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I love making the show, glad to hear others enjoy it too.
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With my 200mW FPV Tx and scew aerials I get well over a mile solid signal, double that with a helical directional aerial, but it does have to have line of sight at that kind of range, it's pretty much a moot point as my 2.4GHz Futaba Tx can't reliably reach that far.
Chris
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In my case the first landing almost landed me in a tree and I put the plane into RTL at the last moment. I should have used the "abort landing" feature, which I have also now tested.
In the end, I created a mission to land the plane and it landed it very well.
I was shaking the rest of the day. What a great hobby!
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