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Police helicopter's 100mph chase with 'super sophisticated' drone near Tucson

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Re: Police helicopter's 100mph chase with 'super sophisticated' drone near Tucson

#231

There's a lot of interesting material in the ATC recording. - Helo pilots felt that it was intentionally staying nearby as it came very close on multiple occasions and did not seem to be trying to evade. They had visual contact most of the time but sometimes had a hard time tracking it against the city lights. - Pilots initially describe it as a quadcopter but become skeptical of that due to the performance. No one e…

If it was burning a fuel wouldn't you also expect it to be easily visible through their thermal camera?

This is my mental debate. On one hand it seems like the endurance of the aircraft would suggest it had to be combustion based. But that would make it appear on thermals, so the fact that it is invisible to thermal would suggest it has to be electric.

An interesting mystery.

Re: Police helicopter's 100mph chase with 'super sophisticated' drone near Tucson

#232
post #170

Earlier quoted context omitted.

No, they come down at their terminal velocity, which is far slower. Could give you a bump on the head, though.

They can still kill you. https://blogs.bcm.edu/2019/12/31/what-goes-up-must-come-down... https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5912041/

Do you claim to be able to understand the second link? Here is a sentence from that paper: “The mortality rate from falling bullets in general is about 32% that is significantly higher than nonfalling bullets 2%–6% although the latter's impact is much more potential to kill.”

I read the first one too. The problem with these anecdotes is that none of them rule out that the injuries were caused by a bullet on a shallow trajectory, with velocity much greater than terminal velocity. The only evidence is that no one heard a shot, but this is not convincing.

Nevertheless, there is a potential for serious injury and nobody should be shooting into the air for fun.

Re: Police helicopter's 100mph chase with 'super sophisticated' drone near Tucson

#233

There's a lot of interesting material in the ATC recording. - Helo pilots felt that it was intentionally staying nearby as it came very close on multiple occasions and did not seem to be trying to evade. They had visual contact most of the time but sometimes had a hard time tracking it against the city lights. - Pilots initially describe it as a quadcopter but become skeptical of that due to the performance. No one e…

If it was burning a fuel wouldn't you also expect it to be easily visible through their thermal camera?

Modern military drones/UAV have some IR shielding/diffusion.

Re: Police helicopter's 100mph chase with 'super sophisticated' drone near Tucson

#234

> I would have to imagine it was larger than a quadcopter, and I guarantee you it was nothing like a quadcopter from how long it was up - it has to be satellite-driven because there’s no line-of-sight, there’s no cell phone coverage that could have dealt with that, so it has to be satellite-driven, which is pretty freakin’ sophisticated.” So, setting aside this claim that there’s no line of sight, my bet is these guy…

> it has to be satellite-driven because there’s no line-of-sight, there’s no cell phone coverage that could have dealt with that, so it has to be satellite-driven, which is pretty freakin’ sophisticated.”

Don’t rule out autonomous.

Re: Police helicopter's 100mph chase with 'super sophisticated' drone near Tucson

#235
post #125
post #82

Earlier quoted context omitted.

> the drone... proceeded northwest at high speed and climbing, with the helo and another LE helo in trail. The copter began to climb and flew out of the TUS area about 50 miles to the northwest of town into the middle of nowhere desert out by the mine west of KAVQ. It was last seen climbing through 14,000’ and into the undercast, where it disappeared. > the mystery craft was essentially playing with them by repeatedl…

To my memory; these things have been repeatedly popping up in the southern US; Arizona and Texas. Maybe not for under $1k. But under any price? Is it physically possible? Yes. We're not talking about a hobbyist guy in his garage here. We're talking about either US Military accidentally caught in a game of cat and mouse with local law enforcement, or more likely: drug cartels. Both organizations operate heavily in the…

[deleted]

Re: Police helicopter's 100mph chase with 'super sophisticated' drone near Tucson

#236

> I would have to imagine it was larger than a quadcopter, and I guarantee you it was nothing like a quadcopter from how long it was up - it has to be satellite-driven because there’s no line-of-sight, there’s no cell phone coverage that could have dealt with that, so it has to be satellite-driven, which is pretty freakin’ sophisticated.” So, setting aside this claim that there’s no line of sight, my bet is these guy…

Assuming that the story is true, the thing that rules out a traditional quadcopter is the fact that it was flying for an hour. You can make quads fast or long range/endurance, but AFAIK, nobody is even close to making a quad that can do 100mph for an hour. The battery weight for that kind of flight time would be too heavy for the quad to fly.

Could be gas powered?

Re: Police helicopter's 100mph chase with 'super sophisticated' drone near Tucson

#237
post #138

Earlier quoted context omitted.

I don't underestimate it, but if I wanted to play around with an expensive drone I could afford to lose, it would be during the day when I could see what I was doing or in a more interesting place. Dangerously flying a large/experimental drone near an air force base goes from "lose my $10k drone" to incurring the wrath of serious entities. Take down a chopper and if it's traced back to you, you're in some sort of tro…

> Dangerously flying a large/experimental drone near an air force base goes from "lose my $10k drone" to incurring the wrath of serious entities. Messing with the armed forces or police seemed to be part of growing up as a teenage boy for some of my friends. (I was tempted to write rite of passage here but that would imply that it happened once for each.) Of course they like me wasn't too well of so it was all about…

But it could be a demo flight to prove to cartels this drone tech is above the law. "Look, we flew circles around a police bird and casually strolled into military airspace, imagine what we could do if we tried".

Re: Police helicopter's 100mph chase with 'super sophisticated' drone near Tucson

#238
post #233

Earlier quoted context omitted.

If it was burning a fuel wouldn't you also expect it to be easily visible through their thermal camera?

Modern military drones/UAV have some IR shielding/diffusion.

How about some examples? This thing was apparently pretty small. I'd like to see how they managed to pack in all these abilities in something just a couple feet across.

Re: Police helicopter's 100mph chase with 'super sophisticated' drone near Tucson

#239

Earlier quoted context omitted.

Assuming that the story is true, the thing that rules out a traditional quadcopter is the fact that it was flying for an hour. You can make quads fast or long range/endurance, but AFAIK, nobody is even close to making a quad that can do 100mph for an hour. The battery weight for that kind of flight time would be too heavy for the quad to fly.

I wouldn't say it is impossible. A (relatively) simple solution would be to use something with more dense power source, maybe fuel. RC enthusiast use fueled engines routinely, it isn't something special. There are various types of advanced fueled engines for RC use from traditional 2-4 stroke miniaturized engines to turbofans. They are not very common on small quadcopters because of lack of response. Quadcopters depe…

Helicopter use variable pitched rotors. I assume a gas powered quad would as well. This would give very fast response and even let them fly upside down.

But still. This still doesn't solve why it wasn't visible on thermal and would still be an extraordinary drone doing all these things.

Re: Police helicopter's 100mph chase with 'super sophisticated' drone near Tucson

#240
post #40

Earlier quoted context omitted.

I don't think there is anything that has a wingspan of 4.5 meters and a capacity to carry 150 kilos of cargo. You have any links?

Jump 20 by AeroVironment with a wingspan of 5.7m and a payload of 13.6kg[0]. A tweet from Spanish police with a video of the compartment[1]. A Vice article about the same drone[2]. At the end it says, "Police found seven drones, each with load capacities of between four and 25kg," which puts the biggest at 1/6th the capacity of this one. Allegedly. For perspective, the Aerolite-103, a single-seat ultralight aircraft…

I still don't se any drone with a 150 kg payload on Alibaba.
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