tgraustin
lvl.2
Flight distance : 3396490 ft
United States
Offline
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Labroides Posted at 3-9 19:24
My hope is to go back in the summer and find the aircraft to retrieve the media from this project on this day...
The last location recorded for the drone was 43.19183 -110.89283.
But this isn't where it ended up as at the time, it was 45 ft lower than where you launched and flying at 50 mph on a curved path.
Hi Labroides,
Thank you for your input, and for taking the time to analyze my flight data. It is important to know that the only time I had control of the aircraft was during take-off, from initial ground launch to about 10 ft off the ground. After that, the aircraft fully flew on its own with no response from my RC.
The last location recorded for the drone was 43.19183 -110.89283.
But this isn't where it ended up as at the time, it was 45 ft lower than where you launched and flying at 50 mph on a curved path.
It could gone quite some distance before it crashed into something.
- Should I be looking in the forest roughly 45ft below the last known GPS coordinates? I'm confused as to how the aircraft could have travelled even further beyond the last known point...
There's a link there to give you a KML file to show the flight (the part with GPS data) on Google Earth.
- Copy. I had been trying to import the .csv files, not the KML file. Since this is a remote backcountry location, I really need to be able to download high resolution mapping for offline use, so I can see my location in relation to the flight path.
- My question for you is, if GPS was not 100%, then how much of this data can be trusted? Will it be off by hundreds of feet, if not more? The other crew members who were on the shoot had visual line of sight during the fly away and where we initially searched was not close to where this flight path is showing. How much of an error could be in play here?
You launched with a battery that had been sitting and discharging
- How do you know this? The batteries that were used had been used for 3 days in a row, with 3 days of full use and recharging to 100% each night before the shoot day. There were no "inconsistent firmware" warnings or anything. I believe my batteries are good, so I'm curious how you can come to this conclusion that they were giving a false reading. The battery had not been sitting and discharging.
You didn't wait for GPS before launching
- I recalibrate the GPS whenever I take off from a new location. Always. Even if I move 300 feet I still recalibrate for this exact reason. I successfully calibrated the GPS before this flight and had the green "Ready to Fly"... So, why would it tell me GPS calibration succeeded when really what you're seeing is I had no GPS data until 39 seconds into the flight? That is very strange you've seen this a few times lately...!
3. - This is why the incident happened
- Classic evidence of yaw error at work. I powered up the aircraft mid slope on a remote mountain side far from steel structures. Have you heard of rock interfering with the compass? Only thing around me was rock, trees, and a lot of snow. It makes sense that if the aircraft eventually regains correct compass while in the air, it will be "confused" while communicating with the RC that is still on the ground within the interference it was causing from take off.. I'm really just confused as to WHY this all happened, even after following a correct pre-flight routine that I've done for years.
ANY input on where to actually look in a few months would be greatly appreciated. Can the last known point GPS coordinates be trusted, or can I use them as a trustworthy baseline to help locate the fallen aircraft?
Appreciate it!
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