Why did this hsppen??

[Kissthesky]

I've got data files and I've guide flight data and I've got DAT files...I'm confused on what you need

 

[BudWalker]

NOOOOOO!!!! Damnet!! It says the DAT file is too large to upload

You'll need to DropBox it.

 

[Kissthesky]

Ugh

 

[Kissthesky]

Drone was at 124' vertical at time of incident. Way above any trees or anything. Just watched the final flight

 

[Kissthesky]

Okay...got dropbox, adding the files to it, how do YOU see the files?

 

[sar104]

Okay...got dropbox, adding the files to it, how do YOU see the files?

You need to post the sharing link to those files.

 

[Kissthesky]

I don't know how to do that

 

[Kissthesky]

It's going to take a minute I will figure this out. These files are to big and it's taking a long time to get them to Dropbox

 

[Kissthesky]

Okay...I have the DAT files, added them to a folder...now now and where do I share them so you can see them??

 

[Kissthesky]

I'm looking at and can open the file with the DAT files in it but I can't share it for some reason! I'm looking directly at the file but when I try to share it it says it doesn't exist!

 

[Kissthesky]

Okay by God I think I figured it out...hopefully this is what you need
DAT

 

[BudWalker]

FLY036 is the incident flight. The motorVolts data shows that there was an abrupt loss of power at the very end as the volts signal dropped from around 14.8 volts to 7 volts in 0.04 secs.

Usually I would say that the .DAT data can't distinguish between a battery disconnect, or a battery failure. But, the control and accel data shows that full throttle and elevator was being applied and then released abruptly which caused the Z axis accelerometer to decrease 0.5 G. One sec later there some more abrupt accelerations involving all three accelerometers followed by the power loss. IMHO, this data means the battery came loose.

 

[Kissthesky]

Thank you for that info so what was the loud grinding g noise just before it fell? Surely that had something to do with the scenario. It sounded like a gear grinding noise...best way I know to describe it. Also I understand that you think the battery came loose but I'm wondering how that is possible when I always make the battery one of the utmost checks in my checklist to make sure it's in tightly and completely. Not saying you are wrong just asking how that's possible

 

[Kissthesky]

The battery is quite literally the most important checklist as I have read and heard many horror stories about the battery falling out.

 

[Kissthesky]

Add i do really appreciate all the help you're giving me on this

 

[BudWalker]

The battery is quite literally the most important checklist as I have read and heard many horror stories about the battery falling out.

It's just MHO. I'm spit balling and probably wrong. But, I do think that it's either battery loose, battery failure, or failure in the circuit between the battery and the motors. Among these types of incidents there have been cases where clearly the battery came loose. And, there has been at least one where power was resumed - that might have been the result of hitting the ground and re-seating.

 

[Kissthesky]

Does it look like from your point of view that that was a possibility?

 

[BudWalker]

Does it look like from your point of view that that was a possibility?

If you're referring to the incident where power was resumed we will need FLY037.DAT if it exists.

 

[sar104]

Thank you for that info so what was the loud grinding g noise just before it fell? Surely that had something to do with the scenario. It sounded like a gear grinding noise...best way I know to describe it. Also I understand that you think the battery came loose but I'm wondering how that is possible when I always make the battery one of the utmost checks in my checklist to make sure it's in tightly and completely. Not saying you are wrong just asking how that's possible

Was the battery in the aircraft after the crash?

 

[Kissthesky]

If you're referring to the incident where power was resumed we will need FLY037.DAT if it exists.

I will look for it tonight