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I do not use any kind of current measurement on any of my larger machines, for exactly this reason. Too much risk, for almost zero reward. I've never ever been flying and thought "Gee, I wish I knew how many amps I've been pulling." I actually bought one of these a year ago. Zero risk with...

LOLercopters: http://www.nbcnewyork.com/news/local/Rep-Sean-Patrick-Maloney-Rockland-Drone-Video-Wedding-FAA-267451671.html

I contacted two national news media outlets after they ran stories about "drones" and offered to explain to them in detail how all of this stuff works. Neither were interested. :cold:

Sorry for the hijack but, 100 km/h from an S800? That's incredible.

I haven't tried their motors yet. But their helicopter parts are excellent. Just building a machine up now, an 800 gasser based on Trex parts, and purchased everything KDE that I could, and it's going together just beautifully.

Wouldn't an inductor before the caps help reduce the ripple current, voltage fluctuation, etc?

+1! It's also interesting, I think, that normal people don't seem to recognize the danger in these things at all, as evidenced by this video. I went to Sparkfun Autonomous Vehicle Competition last month. I was having trouble with the yaw control of my heli. So I was working on it in the...

I don't think you could consider them going downhill, like a consistent trend. More like... variable results. I'd try again.

Man, all the DJI guys going to have to turn their pucks around. Well, they say it will take on the order of a century to happen, so maybe DJI will have implemented a magnetic declination setting by then. :highly_amused:

I've got the same question. ESR doesn't seem to be something that is commonly used for cap selection, so it's hard to shop for them based on that.

Yep, the rest of the system can handle 4S no problem. There is a rumor started by some morons on another forum that the Power Module can't take 4S, but that's completely false.

Well, according to the ESC manufacturers, what you should really be measuring is the temperature of the capacitors, as that is the failure mode. I guess the temperature would be related to the voltage fluctuation, and frequency. That would tell you what the average current is? Then factor in...

I believe there actually is a Warning pamphlet in the box with the Phantom.

0-2000 feet in 2 seconds is going to hurt their credibility in court! Typically these things can do... I dunno, about 20 feet per second? That's almost 2 orders of magnitude less than what they claim. Maybe they should be giving a drug test to the helicopter pilot? And I love the idea: "Ok...

Excellent work! Thanks for doing this. But there's another situation you need to look at. I have read that the problem with long lead lengths isn't the voltage fluctuation per-se, but actually the ripple currents in the capacitors due to the ripple current. ie: While they are busy balancing...

The thing is, it's like the Infinite Monkeys Theorem. Given enough monkeys flying Phantoms, eventually one of them will bring down an airliner. It's just a question of how much time it takes. Just because it hasn't happened yet, doesn't mean it never will. Owning and flying a multirotor has...

Clearly you have never played ET for the Atari. ;) (yes, I actually had it)

Here's a great example that I just stumbled on, pretty well demonstrates my point: So what would have happened if this buffoonery had resulted in the helicopter crashing? Who is at fault? Seems the heli pilot was pretty reckless IMO. Trying to force a drone from the air, when ground...

That may just be because of numbers though. The Phantom probably outsells the expensive machines 1000:1. I've certainly seen plenty of dumb things even from "professional machines". There's been a number, over the years, the latest being that white thing in Italy. I think it's the flight...

Yeah, the X8 is a nice middle-weight lifter. The old 3DR quad, while simple, it "just works". It ain't pretty. We call it the flying pickup truck. The other devs like it because it's reliable. I had one, and with a 4S 5000 battery, performance is actually pretty good. I put 2 4S5000's on...