Strange behavior on my MM
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Olav van Gerven
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The magic word here is: Post your flightlogs.
The video only show the symtoms not the cause.
www.phantomhelp.com
or
app.airdata.com
The video only show the symtoms not the cause.
DJI Flight Log Viewer | Phantom Help
Upload and view flight logs from your DJI drones
www.phantomhelp.com
or
Airdata UAV - Flight Data Analysis for Drones
Airdata UAV - Flight Data Analysis for Drones
app.airdata.com
Thanky for reply here is log |
At 0:29 strong wind pushed it aside. If not the Mini, then the gimball, we've seen it happen before.
Then at 0:56 again due to strong wind you have insufficient power as the drone delivers 100% and sees that it's not enough. Then later in the log we see this again but in another form of message (warning)
What went wrong from the start..
a) If you keep the max altitude set at 500m it will fly away carried by the wind. This is because you have a 249g drone that cannot sustain high wind.
b) You are flying at an altitude of over 240m from H to d. You change to position and it does switch back to Sport as is has not enough force otherwise to remain in the same spot due to high wind.
Let's say that you got lucky. This would be just another flyaway due to high wind and inexperienced pilot.
Common sense Recommendations
- Please do not fly in high winds
- Please do not set return to home too high
- Please pay attention to the environment and your aircraft. If you see something wrong it's better to land. At 240m height, you are unable to see if there is anything wrong.
Good luck and safe flights!
Thank you wery much for explain, I am careful about wind, and at that day was calm wind, the first one warning in video i can imagine becouse it was about 70m high but that worse second one i do not expected strong wind. Becous my first flight was in windy wheather in ground and nothing happened. I still think about it.
In others way, I tried max altitude like test (260m is max) it is not the goal to fly high, but i want to try. For me is 100-150m enough.
At least, somewhere I read, that propeller protection are not good to fly in wind.
thank you again and have a nice day
You were more then lucky there ... besides those few oddities you saw in the end of your flight much more were going on ...
This were all the messages the Mini gave, ALOT as direct consequences to high winds :
The wind the Mini saw during the flight were these (Note that this is from Airdata's Spark profile, known to be like 30% to high for the Mini)
Going straight up to 259 meters altitude from your HP were the reason for the disconnect as you probably didn't positioned the antennas for that. Beside that you hit winds up there very close to the max specified for the Mini, then RTH were initiated ... if you haven't had a slight tail/side wind back to HP you had faced a blow away at that stage.
Regarding what you saw just before you landed were probably a wind gust ... No stick inputs but yet the Mini yaws suddenly & drifts slightly at approx 12 meter altitude.
This weren't the wisest flight I have seen ... but you got away this time.
lannes
Well-Known Member
Your crazy to fly with propeller guards outside as they severely affect the performance of the MM
Last edited:
I am not so sure if this was really caused by wind .....
This is what has happened around 00:29 of the video during which there was a sharp yaw to the left by 76 degree with no rudder input followed by a sharp yaw to the right due to rudder input :
I do notice that there was an easterly wind but as the roll and pitch angles did not change much during this time period, I have reason to believe that the wind was quite steady.
If the uncommanded yaw was indeed caused by the wind, it would be a micro cyclone with the eye lined up perfectly with the center of the drone. I am afraid I have never since such thing in my 10 years of paragliding experience.
Can the OP provide the .DAT file for further analysis ? Follow this thread to get the file : Flight log retrieval and analysis guide
This is what has happened around 00:29 of the video during which there was a sharp yaw to the left by 76 degree with no rudder input followed by a sharp yaw to the right due to rudder input :
I do notice that there was an easterly wind but as the roll and pitch angles did not change much during this time period, I have reason to believe that the wind was quite steady.
If the uncommanded yaw was indeed caused by the wind, it would be a micro cyclone with the eye lined up perfectly with the center of the drone. I am afraid I have never since such thing in my 10 years of paragliding experience.
Can the OP provide the .DAT file for further analysis ? Follow this thread to get the file : Flight log retrieval and analysis guide
Last edited:
Olav van Gerven
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Wind is often underestimated. We feel the wind dow where we stand and think "that's not much..." but as soon as you get higher, you will notice there seems to be wore wind. Just get up a tower or any other higher building and get to a balcony at the top. You will notice different wind conditions there.
Add to that, that advertisements, people on youtube that show what they can do with their drones (and don't tell you how many they have crashed for this one "perfect" shot...) and so on, seduce us to believe that we can do the same. Now, we must face the truth: Most of do not have the funds to replace their drone right after they crashed because of Pilot Error (Pilot Foolishness). Realizing that, I tend to be a carefull pilot, not taking any risks, though I do like to see what I can do. I try slowly, carefully, have the drone in view at all times and as soon as I see "this might be a problem" I come down.
Now, that behaviour might be, because I am at an age that I have had enough thrills and sensation in my life and came to the conclusion, that sometimes the biggest thrill can be not to look for the ultimate but to enjoy the smaller things.
Realize, the MM is a very small drone, it is not designed for bad weather (stronger wind, rain, snow, ice etc.) and we, the pilots, have a big responsibility, not only to our own wallet (costs of repair and replacement) but also to thos who do not think a drone would simply fall from the sky.
Enjoy flying, always make sure there is at least 10 mm between your drone and an obstacle!
Add to that, that advertisements, people on youtube that show what they can do with their drones (and don't tell you how many they have crashed for this one "perfect" shot...) and so on, seduce us to believe that we can do the same. Now, we must face the truth: Most of do not have the funds to replace their drone right after they crashed because of Pilot Error (Pilot Foolishness). Realizing that, I tend to be a carefull pilot, not taking any risks, though I do like to see what I can do. I try slowly, carefully, have the drone in view at all times and as soon as I see "this might be a problem" I come down.
Now, that behaviour might be, because I am at an age that I have had enough thrills and sensation in my life and came to the conclusion, that sometimes the biggest thrill can be not to look for the ultimate but to enjoy the smaller things.
Realize, the MM is a very small drone, it is not designed for bad weather (stronger wind, rain, snow, ice etc.) and we, the pilots, have a big responsibility, not only to our own wallet (costs of repair and replacement) but also to thos who do not think a drone would simply fall from the sky.
Enjoy flying, always make sure there is at least 10 mm between your drone and an obstacle!
I am really grateful for these answers and recommendations.
I pay attention to the strong wind and I know about the gradual increase of wind according to the height of the flight.
my first drift in video 0:29 it could by strong wing, but that second one (video 0:56, fly log time 9:53) i do not think so, altitude just 14,5 m, no wind warning, no wind at the ground level...
thanks for all
I pay attention to the strong wind and I know about the gradual increase of wind according to the height of the flight.
my first drift in video 0:29 it could by strong wing, but that second one (video 0:56, fly log time 9:53) i do not think so, altitude just 14,5 m, no wind warning, no wind at the ground level...
thanks for all
Think you are forgetting that the Mini is flying with "extra payload detected" messages, ie. prop guards attached. They will act as sails making the AC very susceptible to even the slightest winds.
The Fly app clearly tells you at video 0.29 sec how it interpret the situation ...
As said in my post, I am aware of the easterly wind. I don't need to read any messages or Airdata info because I can tell from the tilting angle of the drone when there is no control input. I can't tell the wind speed obviously but it's manageable from the behaviour of the drone before the spinning at 00:29 occurred.
There is a good possibility that a strong gust hit the drone at 00:29 of the video, may be very turbulent as well. The reaction of the drone should be wildly tilting or jumping up and down. However, none of these has occurred, the drone just spun. I am a paragliding pilot and I had to understand wind because it means live or death for me . It's just that I can not imagine what kind of wind could make the drone to react like that.
I pay attention to second event in video (0:56) where the drone was much worse...
You need to realize that you have a drone up in the air of a paper clip weight ... you have very low velocity forward towards you meaning the tilt angle is very low (drone close to horizontal in the air) ... to this you also have sails attached to that little bugger. in that situation the Mini is very easily moved by gusty winds ... you don't know the winds up at 12 meter altitude just because you doesn't have any at ground level. I'm not at least surprised of the rotating gusts at that altitude as you are slowly descending below the surrounding tree tops.
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