Actually the strong winds cause Blow Away issuesbattery dislodged, propeller broken broken, strong wind are common fly away issue.
Good analytical skill from Sar104 that helps many pilots to avoid such situations. Thank you.
Awesome Decoding, Were Lucky To Have People Here Like You To Nearly Pinpoint Our Fly Away/Lost Drones ??That's the file. The evidence is circumstantial but very suggestive. Looking at elevator input, pitch and forwards velocity shows the following at the end of the flight - the aircraft is flying forwards at 19.5 m/s under full forward elevator in sport mode, pitched forwards at 30°. Right at the end, you released the elevator suddenly. The data are not recorded due to telemetry latency, but that will have pitched the aircraft back rapidly to full available backwards pitch (~35°). The maneuver almost certainly dislodged the battery and killed aircraft power, losing motors and telemetry.
View attachment 92392
There is uncertainty on how much braking that maneuver managed before power failure, but likely not much. Based on the last recorded velocity we can estimate the descent trajectory using an aerodynamic drag model for the Mavic 2, giving the following:
View attachment 92393
Plotting the descent track on Google Earth:
View attachment 92394
The far yellow pin represents the descent if the aircraft didn't significantly brake before losing power - i.e. the furthest it should have travelled. I'd start there and look back towards the last recorded point.
Best advice I can give is "avoid sport mode". IMHO. I see no reason to use it. FWIWThat's so impressive!! I have much to learn
holy **** how? I was thinking the battery couldn't have ejected out as it was in fast forward flight.
Do you charge the smart controller while on the hike?Yea, but I often hike for miles to get to a rural AZ location... rather lug the batteries than miss a distant shot.
I saw the telemetry delay after rereading and deleted it but you quoted so it's kept forever. How long did it take to calculate everything?During the eventual deceleration, yes - but consider what happens when the FC puts on the brakes. The initial response is a rapid rotation from forwards pitch to backwards pitch, which will tend to lift the back of the battery. Somewhat counter-intuitive I know, but there is enough documented history of this exact mechanism that we know it's real.
No... not usually. I’m hiking really rural. Either my SC or my CS will run through at least 6 M2P batteries.... if I use the CS I can carry 2 or 3 batteries for it.... more than enough for my 10 drone batteries. I do have a car charger I use sometimes.Do you charge the smart controller while on the hike?
I saw the telemetry delay after rereading and deleted it but you quoted so it's kept forever. How long did it take to calculate everything?
yeah, best way to do analysisI have programmed functions to do all the common analysis, so approximately 100 ms or so total.
I could delete the quote too, but then the conversation would be all messed up.
Working on the next one... but here’s oneshow some footage
Great news sar104 did it again a great job.. now i know that the sport mode can cause enough force to eject the battery out..I CAN'T BELIEVE IT!!!!!!!!!!!!!!!!!!!!!! I FOUND IT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
EXACTLY WHERE SAR104 SAID IT WOULD BE!!!!!!!!!!!!!!!!! Not just close, but RIGHT WHERE HE SAID IT WOULD BE. She's got a couple broken legs but at least I have the carcass I can send back to DJI and hopefully get a replacement/repair under the Refresh program.
THANKS A MILLION SAR104 . . . bona fide genius!!!!!!!!!!!
I'd start by making your own thread and post your logs.I lost my Mavic 2 Enterprise zoom today. I was 10 minutes into my 3rd battery for the day. No wind. Drone was stationary and i broadcast a message on the speaker. Drone was 30 metres away and all of a sudden did a fly away at full speed. I tried to control but no good. Pressed Rth button but no good. Logs show it was doing 20m/s and within seconds it was in the ocean 350mtr out. What do i do next?
Working on the next one... but here’s one
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