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Mine just shipped. Can't wait! GH4 with 70-200/2.8 L II, baby.

You need an I2C converter to interface them.

GoPro wifi also has serious latency (>1sec) so it's pretty useless in the air. Its range is also about 20-30m if you're lucky.

Do you have the level set to 127 or zero? You should set the level to zero so that it locks in wherever you have the throttle.

I did the ALS Ice Bucket Challenge with my X8 copter today. 10 pounds of ice water dumped from the air on my head. It wasn't easy, but it sure was fun! Hopefully I can whip together a "Making Of..." if I have some time this week. It was quite the adventure! :D

What an amazing opportunity! I bet we could all learn a lot if we had access to resources like that!!

It's probably the battery. Measuring the voltage on the ground is meaningless. All batteries have some "voltage sag" under load so it's likely that once your copter is running it's dragging down the battery. That's a very heavy battery, too. Does your copter have enough power to fly with a 10000...

Check HeliDirect for Pulse LiPos. Tattu are super hard to find. Ask Mrs. Google.

Robert, I did a few back of the envelope calculations with my thinking cap and my slide rule, and I don't quite see the same numbers as you do. Can you clarify? Thanks! 1. What do you mean by prop disk area? Do you mean the area transcribed by a single prop as it spins? 2. How did you get to a...

Jfro, I'm no electrical engineer, but I have a little experience with these things, so let me comment. First of all, I think we all have to understand that there is a connection between voltage and current/amps with batteries, but they're very different animals. Without going off road here and...

I'm curious what you would do to fly a 8-9 pound payload (gimbal, camera and FPV gear)?

6S, yes. I've been wondering why there aren't good mid-range "efficiency" motors out there. I guess T-motor is coming out with the U6, which may provide the kind of profile that'd come closer to your ideal numbers. What do you recommend that would achieve the numbers you have for your quad when...