The magnetic effect of a steel object depend upon the size of the object and how close it is.
He calibrated right on top of the pier which had a substantial amount of steel visible.
This would have had much more effect than the ship at that distance (inverse square law applies).
Exactly. I'm in the camp of only calibrating the compass if it tells me to. "Maybe" after a major firmware update, but not always. Of course, that is after I get a "good" calibration in a known spot with no interference. I've gone months without calibrating the compass.................. why would you have to if you already have a good calibration?! Months and 100's of flights without re-calibrating it. No problems at all. The other camp says calibrate before each and every flight. My opinion is that you are taking chances to introduce a bad calibration each time you do this. So........... that's my story and I'm sticking to it. Not arguing, I can respect the other camp. To each their own. Just introducing another opinion from 6 months of flying experience.............. This is another example of the problems you risk if you think you feel you should calibrate every flight.
Howdy and welcome! There are a few pre-flight checks for download floating around the forums somewhere.Hello people, I am new to this forum and to Phantom, arriving tomorrow. [emoji4] Excited!!!!
I just returned my Yuneec Q500 4K (was a mistake!) and now joining the crowd! [emoji854][emoji16]
What I wanted to add here is that, as I have been learning how to fly with X-Plane flight Sim, there is one thing real flying is involved is that 30-40 minutes prep before plane even moves off the tarmac. Flight plan and pre checks. I tried to flew Yuneec Q500 as in the same way and had one accident within 3 weeks (my fault of flying too low). Otherwise it all flew well. Highly recommend to you all to have a preflight check each time and have a plan in your mind. Rushing is dangerous. [emoji54]
Best wishes!
Sent from my iPad using PhantomPilots mobile app
This has nothing at all to do with the ship or its antennas and everything to do with unnecessarily calibrating his compass on a pier lined with steel sheet metal...
meta you do a lot of flying out to sea etc and probably around marinas are you under the same understanding as me that once you get a good compass calibration you dont need to keep doing the funky chicken dance unless if you travel a good distance away from the original calibration i.e i think its 100 miles. I do a lot of flying around marinas etc the last thing i want to do is a compass calibration around alot of metal objects when i already did a good one originally in a wide open field less than 5 miles away!!This has nothing at all to do with the ship or its antennas and everything to do with unnecessarily calibrating his compass on a pier lined with steel sheet piling.
The magnetic effect of a steel object depend upon the size of the object and how close it is.
He calibrated right on top of the pier which had a substantial amount of steel visible.
This would have had much more effect than the ship at that distance (inverse square law applies).
This is another example of the problems you risk if you think you feel you should calibrate every flight.
In the video the problem occurs when the ship is long gone.I said what I did about the antennas because the problem happens when crossing the ships path
The DJI manual makes no mention of magnetic or radio interference from ships or their antennas.I read in the full phantom manual to be careful crossing the ends of ships because their antennae have been known to cause problems. No doubt calibrating directly on top of sheet metal and probably rebar would also make for a bad day.
Light and radio area all electromagnetic radiation and behave similarly.You mentioned an inverse square law can. You reference that so I may read more about it. There is s similar law for the falloff of light I'm wondering if radio waves behave the same...
Definitely. I sometimes go months without recalibrating and have sometimes travelled considerably more than 100 miles without ill effect.meta you do a lot of flying out to sea etc and probably around marinas are you under the same understanding as me that once you get a good compass calibration you dont need to keep doing the funky chicken dance unless if you travel a good distance away from the original calibration i.e i think its 100 miles. I do a lot of flying around marinas etc the last thing i want to do is a compass calibration around alot of metal objects when i already did a good one originally in a wide open field less than 5 miles away!!
I'll agree that the effects of the ship fall off with distance. But, it's incorrect to say that the inverse square law applies which used to describe the attenuation of radiated fields. The ship distorts the geomagnetic field, it doesn't radiate an magnetic field. Comparing the two doesn't make sense, but, I'll speculate that the effects of the geomagnetic distortion are very small compared to any electromagnetic radiation.In the video the problem occurs when the ship is long gone.
The problem becomes evident when the Phantom gets away from the distorted magnetic field in which it was calibrated.
It is unable to work out the earths normal magnetic field because it has been corrected for a very different field on the pier.
The DJI manual makes no mention of magnetic or radio interference from ships or their antennas.
At the distance it was, the ship probably had something like 1/100th of the magnetic effect of the steel sheet piling visible in the pier.
I know a thing or two about flying around ships and at the distance that ship was, there would be no noticeable effect: Shipping - Above & Beyond Photography
Light and radio area all electromagnetic radiation and behave similarly.
The intensity of both light and electromagnetic radiation is inversely proportional to the square of the distance from the source.
This is why the effect of the close steel in the pier is much, much stronger than the effect of the more distant ship.
Agreed.No. The ship will have a magnetic field. But only if you calibrate or take off too close to it or fly right next to it, will you have issues. The antennas on the ship will do little.
This!
100% unrelated. You didn't have any local maps cached - that's got nothing to do with the compass.The other day I had an issue with all the roads and info on the map not showing up only the arrow. Any idea what that was all about ?? I remember seeing this video and I got kind of nervous thinking that something similar was about to happen to me.