DJI F450/NAZA Flyaway

P

Pleiades

Member
Had the misfortune today of having to watch my quad fly away into the blue yonder.
Standard DJI product with Naza v2...only finished the build a few days ago.

Was fairly high at the time and had problems maintaining visual contact.
Switched Tx to IOC Home position and tried to bring it in, but nothing seemed to happen....maybe had already traveled out of contact and RTH had kicked in.
Lost sight of it and in desperation turned the Tx off.
It didnt come back!

I did the compass dance prior to flying, and saw the 20 green flashes which marks the home position, and when I first took off everything seemed to be working fine.

What I reckon could have happened is that when RTH was initiated, the quad went to 20 meters as programmed....but maybe the problem was that where it was at the time ground level was prob 60-80 meters above the altitude where it took off from so that it met the ground well before the programmed altitude.

What do you guys think?
Please be gentle...I feel gutted.
 

C

Crisp image

Member
I feel for you.I nearly lost mine in a big tree. Did you have contract details on it? Put it out on social media in case some one finds and is honest enough to return it. No idea what could have gone wrong.
Regards
Crispy.

Sent from my GT-I9210T using Tapatalk
 

Benjamin Kenobi

Benjamin Kenobi

Easy? You call that easy?
Hey mate,

So you lost it? Damn that sucks :dejection:. The 20m is only the minimum altitude. If below that it goes up to it. If above that altitude it stays at current height and RTH. The fact it flew away in the first place probably means RTH wasn't going to work. Not having the aircraft back to review the damage will really hinder finding the cause. Since it's a new build it could be so many things that caused it.

Had you successfully flown it before or was this the first flight? Did it fly normally for any length of time before the fly away?
 

P

Pleiades

Member
Had a couple of very successful flights previously and was very happy with it.
After take off on this occasion everything seemed to work fine.
Had previously made sure that RTH was enabled in Naza software and Tx

As it was heading towards the town centre I was so concerned that it might fall and do damage to people/property so I reported it to the local cops
They were very understanding, and told me that they had no reports of problems of that nature

Im just hoping that I get it back..Ive spread it over local social media, have organised an addy in the local newspaper and plan to tell the local radio station tomorrow
So in a city of this size I reckon I have a better than 50% chance of getting it back
 

Benjamin Kenobi

Benjamin Kenobi

Easy? You call that easy?
Really feel for you mate! Hope you get it back. Which city was it? Might be someone on the forum who's in the area.
 

COMike93yj

COMike93yj

Still Building!
Pleiades!!!! OHHH NOOOOOOO!!!!!!!!!!!

I feel so badly for you and your quad! I am soooo sorry for the loss of it. Hopefully some kind soul will find it and return it to you. Did you happen to put a little note on it with your phone number and address or email? I am going to do this straight away so that if it does get lost someone might be kind enough to return it.

Mike :(
 


P

Pleiades

Member
COMike93yj said:
Pleiades!!!! OHHH NOOOOOOO!!!!!!!!!!!

I feel so badly for you and your quad! I am soooo sorry for the loss of it. Hopefully some kind soul will find it and return it to you. Did you happen to put a little note on it with your phone number and address or email? I am going to do this straight away so that if it does get lost someone might be kind enough to return it.

Mike :(
Click to expand...

No I didnt, but I did just get a tracking device but hadnt figured out quite how to use it!
 

DucktileMedia

DucktileMedia

Drone Enthusiast
I think everyone with a DJI product needs to write their name and address on their heli. This just happens way too much. Sorry you lost it but thankful no one got hurt.
 


Benjamin Kenobi

Benjamin Kenobi

Easy? You call that easy?
WooHoo! That is great news! Just structural damage by the looks of it. The electronics are the expensive part.

PS - Lens cap! HA! :lemo:
 

Benjamin Kenobi

Benjamin Kenobi

Easy? You call that easy?
And you mentioned RTH activated at 2.4km. That happens to be the range of 2.4GHz systems. Check RTH is in fact activating correctly and you have bound the controller it RTH mode. And try to assign a switch for RTH, you won't have to turn off the controller then!
 

coreyperez

coreyperez

Member
I was looking at your flytrex data. I zoomed in at the end and noticed it was all over the place. Do you suspect that was from it falling from nearly 1400'? Also, I noticed flytrex is nice enough to call the terminal point "landing".... I found that humorous at your expense

Corey
 

photobobga

photobobga

Member
Too bad flytrex does not have a WTF badge! Earning 7 badges surly was not your goal during this flight. Please keep us posted if you discover the cause for the fly away. Were you by chance using a GoPro camera? If so, was the wireless option (blinking blue light) turned on?

-Bob
 

Mojave

Mojave

Member
Pleiades said:
I got it back!
Thank goodness someone took it into the local police station
A little the worse for wear!
Click to expand...

Thanks for sharing your adventure. This will help some of us. Please keep us informed on what you figure out. I wish I had some arms that I could send you!
 


P

Pleiades

Member
Now Ive had time to think and review the Flytrex data Im pretty sure that the quad was behaving normally.
I reckon the problem was with the nut behind the Tx.
When it was so far away and I realised that I'd soon lose visual contact, I started to panic.
I thought I flipped it into Home lock, but Im pretty sure that I got the switches mixed up and put it into Atti
The quad did what it was told and carried on its merry way until I switched the Tx thus triggering RTH.
Obviously the Lipo died before it got back.

Ive had a look at the damage and have only had to order 4 new arms and one motor so I consider I got away fairly lightly.
All this has been a big wake up call to me, and I thank you guys for being so supportive.

I must learn how to program a failsafe switch on the Futaba 8FG
....can anyone point me in the right direction?
 

Sac D

Sac D

Hard Landing Specialist
Pleiades said:
Now Ive had time to think and review the Flytrex data Im pretty sure that the quad was behaving normally.
I reckon the problem was with the nut behind the Tx.
When it was so far away and I realised that I'd soon lose visual contact, I started to panic.
I thought I flipped it into Home lock, but Im pretty sure that I got the switches mixed up and put it into Atti
The quad did what it was told and carried on its merry way until I switched the Tx thus triggering RTH.
Obviously the Lipo died before it got back.

Ive had a look at the damage and have only had to order 4 new arms and one motor so I consider I got away fairly lightly.
All this has been a big wake up call to me, and I thank you guys for being so supportive.

I must learn how to program a failsafe switch on the Futaba 8FG
....can anyone point me in the right direction?
Click to expand...

Try this:

http://www.youtube.com/watch?v=5nHuWZXwpXE
 

sledge57

sledge57

Member
First of all good deal on getting her back, that's awesome.

A question, I was looking at the Flytrex data too and was wondering if the altitude height is correct. Is the spot where it crashed really 500' higher than where you took off from? I'm asking because I'm interested in Flytrex now myself, just needs a way to transmit the data back real time and it'd be perfect. Imagine if it could, you would have known exactly where she went down. Flytrex would sell a bundle of these things if they can figure that out.

Lastly I set up a RTH switch on my T8FG Super, I can help. Give me a bit to type something up and add pics The RTH switch wasn't too hard, I even figured out the timers on a switch which was a bit harder but once I knew what was happening much easier.

By the way for the switch confusion what I plan to do is put different color shrink tube on some of the switches and jotting the color code on a card I can attach to the Tx handle until the switches are second nature.
 

sledge57

sledge57

Member
Sac D said:
Try this:

http://www.youtube.com/watch?v=5nHuWZXwpXE
Click to expand...

This video is good, however he left out an important detail, (actually 2 details although I've yet to get confirmation the second is needed but I believe it is) and it will not work.

Also before we start this, your switches could be different from what the video shows, my mode switch is not on GEAR mine is AUX 5, whichever switch is set for you to change modes is the one you need to work with.

Ok he showed looking at the endpoints, what he omitted was you have to temporarily change the endpoints settings for the MODE SWITCH (Man, ATT, GPS) I set both end points from 79 to 37 (remember you had to set end points for GPS and Manual with ATT being in the middle, you should have a number close to 79 in them)

After doing this you have to goto the failsafe menu and go to wherever your mode switch is set to (again mine is AUX 5, in the video it was GEAR) Scroll down to yours and scroll over and highlight HOLD, hit the RTN button and change HOLD to F/S, then scroll to right and highlight the area past OFF, should say 0%, while highlighted hold down the RTN button on your Tx for a couple seconds, you will see the number change, in my case it's -36%.

After this exit out and go back to the endpoint menu and reset your mode switch end points to where they were before (agian mine are to 79)

If you do what he shows in the video and this the RTH switch should be working, confirm in Naza assistant.

The second thing I did was set the throttle in Failsafe. Go to Failsafe menu scroll down to Throttle and highlight HOLD, hit the RTN button and change HOLD to F/S, then scroll to right and highlight the area past OFF, should say 0%. Then I set my throttle stick to a tick above 50% and hold the RTN button for 2 or 3 seconds again, you will see the number change to what ever you have your stick set to, mine is -7%.

(I've seen videos that show setting it just above 50% and others just below 50%, and again I don't know for sure this is needed, hopefully we'll get an answer to that too)

Let me know if this helps for you.
 

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