SteveMann said:
PhilD13 said:
Complete loss of GPS would mean the bird would land where it currently is flying and will drift with the wind while doing so.
Is this a new feature?
If GPS signal is Lost or not Active: Phantoms simply land straight down. It may be drifting during the descent
and landing process page 16 of the
THE Ultimate Guide for all Phantom Vision and Vision+ owners
PhilD13 said:
Aircraft could cause an issue especially if they are military.
How? Aircraft don't transmit anything on the 2.4 or 5.8 GHz bands or on the 1.2GHz GPS band.
MVarious agencies both commercial and military tend to use various frequencies and these tend to be high power at least as far as the phantom is concerned. Even a signal not on the exact frequency can have side frequencies and bleedover or just be strong enough to interfere.
S band - 2–4 GHz Moderate range surveillance, Terminal air traffic control, long-range weather, marine radar; 'S' for 'short'
C Band - 4–8 GHz Satellite transponders; a compromise (hence 'C') between X and S bands; weather; long range tracking
X Band - 8–12 GHz Missile guidance, marine radar, weather, medium-resolution mapping and ground surveillance; in the USA the narrow range 10.525 GHz ±25 MHz is used for airport radar; short range tracking. BTW this band was named X band because the frequency was a secret during WW2.
Around here farmers tend to interfere with certain frequencies during planting time, but generally not on or even near the frequencies the transmitter is on.
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My main point was not to argue with others about what fixes should be made or not made, but rather to suggest that certain issues may not be possible because of the fast recovery and response the bird had on video when the Op switched to Failsafe/RTH on the controller. Suggesting modifications of things after the fact does not prove or disprove an issue. Fact is if the motor wires shorted together, wire comes loose from an ESC, or a FET is truly blown, the bird becomes a rock with no recovery no matter what mode. In this case there were 2 recoveries on video and both times they went very well so I don't think there was any electrical or mechanical issue with the motors or the ESC's. I am all for making sure things are routed properly and secured well, and the motors are matched properly to the latest ESC's, but the Op was asking what could cause the issue not how to fix an as yet unidentified issue. In my opinion it was some type of interference.