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I actually had a guy contact me looking for filming services. I said OK, but it'll take a while because I have to apply for an SFOC which takes weeks, etc. He responded basically "Ok, thanks but, I'm just looking for some guy with a Phantom to do it under the table." There's going to be a...

Yes, eCalc is great as long as you understand that it's accuracy breaks down when designing machines that fly for more than 20 minutes. It's pretty hard to get an eCalc past 30 minutes, and I've never been able to surpass 40 minutes, even with T-motors and zero frame weights and NCR18650...

Agreed on the quality hex drivers. Problem is... where to get them? I bought a set darn near... wow 15 year ago? Integy brand name. They were like $100 or something for the set. But they have lasted 15 years. They are getting worn though. I've tried to replace them, but everything I've...

Really to have this discussion, you need to define your mission. My 1/3rd rule is for a small hobby type FPV or just-for-fun videography setup with a target flight time of ~20 minutes. Kloners numbers are probably based on the concept of a man-portable airframe capable of lifting a large...

A fairly standard rule of thumb is 1/3rd. 1/3 payload, 1/3 battery, 1/3 airframe.

As always, I believe in more knowledge, less chequebook.

I would LOVE to hear how the a PDB would help stop motor sync problems. HTF does that work? So much snake oil...

I'm surprised this is being debated here. The problem with SimonK firmware on any ESC when used with low kV motors and heavy props is very well known now. This has nothing to do with the ESC manufacturer. There are some things you can do to help the situation, but it's complicated. You have...

Have you read through this wiki? http://copter.ardupilot.com/ I'm having trouble understand exactly what problem you're having.

The main cause of compass interference is inductive loops. All power wiring should have both positive and negative wires run along exactly the same route, and tied together so they have no separation between. Twisting them is even better. The next best solution is simple separation between...