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The Z-axis vibration can also be caused by the blades being out of track. The motor can be perfect, but if the blades aren't made perfect, you'll get tracking issues which are not easily fixable on a multirotor. Not that any of this really matters. You can spend $1B balancing your motors and...

Sorry, but this is just not correct. AC motors do not like square wave electricity. So fridges, saws, etc. They run on it OK, but they end up running hotter than they would on a proper sign wave. You can actually burn out a motor if you run it at full load for too long on a square wave...

Heh, you been talking to Jack Crossfire? :) That is kind of the running joke. To make it in the UAV business, all you have to do is come up with a neat idea, develop some cool marketing material, produce no product for sale, and then just wait for the $1B buyout. If you actually produce...

The image recognition and tracking, and target following part isn't too far off. But intelligent collision avoidance, and true hands-off failsafe is quite a long way off. So you'll have to use these things out in the open where nobody is around, or at altitudes way above the trees, lift lines...

Playing around with eCalc... Assuming frame weight of 1500g, 1000g of camera and gimbal payload, 4S20,000 batteries, U7-420 motors with 19" props, it shows 57A draw in a hover, pretty close to what you're saying. It's showing 18 minutes. So it looks like I got the specs roughly figured out...

They've actually been spamming DIYDrones too. I believe they don't actually have any product for sale, the system isn't even developed yet, they are trying to drum up investor support for the concept.

I've got mine mounted like this and it works fine. I could even have those standoffs lower and it would be fine. So it doesn't have to be "on a stick" necessarily.

Is that 6S? Which motors and props? I've never seen machine specs for something with that performance, so I'd like to see how it's done. I'm just curious about how big and heavy a multirotor with those specs is. Understood about your concern with SRH. I design them with the concept of...

This is sort of true, in a round-about way. What you guys really need to be talking about is disk loading. It's all about disk loading. The lower the disk loading, which is rotor disk area divided by weight, then the more efficient the machine will be. This is what leads to the idea...

Sorry it didn't work out for you.

You should have data logs on the Pixhawk that should explain what happened, even though you never hooked up a computer previously. If they configured it right, it should have been logging. I was not involved with the development of the Iris, or the writing of the marketing materials or...

Just to be clear, it CAN be used without having telemetry. But it has to be set up properly to do that. Without having seen the logs, my guess is that it was in state where something was wrong, but 281tx wasn't aware of it. If you want to fly with it as a simple controller, with no feedback...

Thanks dazzab, you said it better than I could.

No telemetry or anything either? I strongly recommend all people use telemetry virtually all the time. It's the only way to know what's going on with the system. It's a VERY complicated system. My guess as to what happened was you had really bad GPS reception, and it triggered a geofence...

Well that's a bummer. What do you mean by no GPS signal? The Pixhawk was reporting the GPS wasn't even connected, or it just couldn't get a lock on the satellites? Do you have a log. The unexpected take-off is very strange. My only guess is you had some kinda of GPS failsafe event.

No nerve touched. ;) Dazzab didn't like his experience, and there's definitely some good reason for that. But I don't think it should go down as the defining statement of the status of Arducopter. The fact that there are not many people *here* using it, doesn't really have much to do with...

I don't disagree with what you're saying there. I tried to intercede as a level-headed middle-man. I think it was too little too late though unfortunately. I wish I'd seen the whole thing earlier. I do still stand by my point that there are people using Arducopter for professional AP. They...

Well, if you want to get a thread going there, we can all participate on moving it forward. The biggest issue is going to be vibration damping the board. I'm pretty sure it can be done.

I do not think the "default" PIDs would work on your large Octos. These machines are quite different from the typical machines used with Arducopter (well-powered, 600-size quads). Nobody has run Arducopter on a gasser heli yet. I'm actually trying to build up to it. I have a customer that is...

Hi, I did get your PM's. You'll have to understand that I am an EXTREMELY busy guy. You fired off a couple communications before I had any opportunity to respond. I'm not sure if I'll be able to give you the help that you're requesting. I try to do what I can, but there's limits to my free...