'An expensive event’: 50 drones plunge into Swan River during sky show fail

[Dronut]

‘An expensive event’: 50 drones plunge into Swan River during sky show fail

The boss of the company behind the show estimated about $100,000 worth of drones malfunctioned. “I did cry a little bit last night,” he said.

www.watoday.com.au

 

[GFields]

‘An expensive event’: 50 drones plunge into Swan River during sky show fail

The boss of the company behind the show estimated about $100,000 worth of drones malfunctioned. “I did cry a little bit last night,” he said.

www.watoday.com.au

I would think one would have that much equipment insured.

 

[Yorkshire_Pud]

Ouch
I was wondering if any scuba divers 'got in there quick' but also are there croc's in that river? Seemingly not but according to wiki it has bull sharks. eek

 

[SmilingOgre]

Yikes!!!! Thank God they were not over people. Just for fun I calculated the free fall stats of a two pound object (aprox M3) from 400 ft. It would reach up to 160fps and transfer 800ft/lb of force on impact. Not commensurate with the normal functioning of the human head.

 

[Yorkshire_Pud]

I think your freefall speed is a bit fast, a Phantom 3 adv freefalls between 14 and 16m/s.......but.......as you say "Thank God they were not over people."

 

[SmilingOgre]

I think your freefall speed is a bit fast, a Phantom 3 adv freefalls between 14 and 16m/s.......but.......as you say "Thank God they were not over people."

Can't say much about that. Simply used a freefall calculator with a two pound object at 400 ft. Obviously there would be wind resistance to consider but that would be a nuts thing to try to figure out.

 

[Yorkshire_Pud]

Can't say much about that. Simply used a freefall calculator with a two pound object at 400 ft. Obviously there would be wind resistance to consider but that would be a nuts thing to try to figure out.

I did the freefall thing with the P3 over the sea, it was impressive, the restart worked too lol.
Someone here deliberately CSC'ed a Mavic Mini or Mini 2 from 'quite high' but didn't follow the instructions they were given so it ended up as a pile of bits, even if there was a chance of a restart.
Unfortunatley I didn't bookmark it and don't remember what I worked the average freefall to be (there was video, I think a screen recording, and I have never been able to find the thread again.

 

[SmilingOgre]

I did the freefall thing with the P3 over the sea, it was impressive, the restart worked too lol.
Someone here deliberately CSC'ed a Mavic Mini or Mini 2 from 'quite high' but didn't follow the instructions they were given so it ended up as a pile of bits, even if there was a chance of a restart.
Unfortunatley I didn't bookmark it and don't remember what I worked the average freefall to be (there was video, I think a screen recording, and I have never been able to find the thread again.

You're braver than I. I really don't want to know or test it out. I'd probably have heart failure before the test was over, lol. I just don't want to be around the day Chicken Little is right.

 

[Yorkshire_Pud]

Ahh but you are sensible......where as I have a screw loose at times lol and it was quite 'thrilling' in a clenching sort of way.

 

[MA2 317]

More plastic and battery junk in the water ways.

They should of been equipped with Rescue Jackets from Phantom Rain.



.

 

[MAvic_South_Oz]

Can't say much about that. Simply used a freefall calculator with a two pound object at 400 ft. Obviously there would be wind resistance to consider but that would be a nuts thing to try to figure out.

Lots more to it . . . for interests sake . . .

....

As for the event / story, yeah that's not good to see, these must have been the types that drone show light companys can purchase in lots of 100's etc, and they are not cheap (as per story $2000 or so each).

I've seen videos from China where drone show machines have dropped from the sky, and this WAS over people, and some were hit by them apparently . . . obviously not as controlled as more western country events, will see if I can find it . . .

Found 2 videos quickly, there might be more.
They look like similar drones, but might have been separate events, as the sky patterns looked different.

 

[karlblessing]

From the Perth video, seems like when they fall, they're very clustered together. So I'm guessing they hit each other.

 

[spsphotos]

MA2 317" data-source="post: 1496034" class="bbCodeBlock bbCodeBlock--expandable bbCodeBlock--quote js-expandWatch">

More plastic and battery junk in the water ways.

They should of been equipped with Rescue Jackets from Phantom Rain.



.

They are recovering them, so won't stay in the waterway long.

 

[billy750cc]

I feel like I can trust anyone whose title is "Lord Mayor."

 

[lookout]

UAS Kinetic Energy Impact Ballistics Table

Yes I have the full .xls, Pages and PDF chart if you want it. This is a .jpg of it for upload here. Removed names and such as we are not allowed to advertise on this forum. Unmanned Aircraft Systems Ground Collision Severity Evaluation • What are the severity criteria for Unmanned...

mavicpilots.com

Ballistics table

 

[karlblessing]

I feel like I can trust anyone whose title is "Lord Mayor."

Must be something that carried over from the British days...

 

[Gary_Seven]

That's what they get for doing a Christmas Show in November.

 

[lookout]

That's what they get for doing a Christmas Show in November.

I thought that was supposed to be in July.

 

[Meta4]

UAS Kinetic Energy Impact Ballistics Table

Yes I have the full .xls, Pages and PDF chart if you want it. This is a .jpg of it for upload here. Removed names and such as we are not allowed to advertise on this forum. Unmanned Aircraft Systems Ground Collision Severity Evaluation • What are the severity criteria for Unmanned...

mavicpilots.com

Ballistics table

That table is useless since it just has a bunch of different velocities with nothing to indicate what the actual terminal velocities of the various models are.

 

[Meta4]

Can't say much about that. Simply used a freefall calculator with a two pound object at 400 ft. Obviously there would be wind resistance to consider but that would be a nuts thing to try to figure out.

That calculator is fine for objects falling in a vacuum, but useless for real world cases where the object falls through air.
A drone with 4 propellers has a lot of drag and falls nowhere near that fast.