"Your blades and battery may be undersized for the KV of the motor.
That motor can go to a 6s battery and drive blades around 17-18 inches.
You might try larger blades first."

"The Kv ratings are basically how fast the motor spins relative to the voltage applied.  Google "multirotor motor kv" and you should get some good hits explaining the concept.
Generally higher Kv are used with smaller blades and lower Kv are used…"

"I have a few multi-copters running with Sunny Sky motors and they work great.  Got some from www.buddyrc.com and others from www.simplecopter.com.  Hardy little workers.
I have a v-tail quad running X2212-13 KV980 II SunnySky motors which has been…"

"So this is where it is a little tricky.  I use both the APM Planner 2 and the old Mission Planner for configuration.  I started with APM Planner 2, which has the configuration setup for the Lidar Lite, and then after configuring some of the newer…"

"Ok.  Sounds like you are following the instructions, but something must still be off.

I too use a Spektrum DX8 transmitter with the AR8000 receiver.  One thing that tripped me up when I was setting up my unit was the servo settings because the…"

"Sorry to hear you are having issues.

The issue may not be motor calibration.  Have you followed the instructions on the pre-arm page http://copter.ardupilot.com/wiki/prearm_safety_check/ and Arming…"

"Hi, Dave,
I have a Pixhawk but it is on a Hex (6 rotor), not my Quad V-Tail.  I meant by my comment that the V-Tail I have is very sporty, not to say that Pixhawk supports the V-Tail configuration yet.
The dimensions may be found on the 3DR…"

"Hi, Steven,
You are asking all the right questions.  The area of multicopters is still in its infancy but even so there is a huge amount of variety in feature, form, and functionality out there.
There are a lot of cool frames available, some with…"

"I cannot speak to this specific Lynxmotion V-Tail design, but I have a SimpleCopter V-Tail which I really like.  It is running a KK2 board and it is a very sporty flying vehicle. I am learning how to do flips with it which is great fun. The KK2 is…"

"My actual experience with these boards is just with the APM (multiple successful flights), the KK2 board (very fun acrobatics), and the Pixhawk (setup and ground testing - no actual flights yet).
There are other controllers out there to which I…"

"At least when I received my Pixhawk, power module, 3DR radio, and GPS module they each came with the appropriate cables for connecting to either a Pixhawk or an APM, and all the 6-6 cables were fully connected.  The APM uses the 6-5 pin DF13 cable…"

"If you want to connect something with different end connectors than what comes with the PX4 cables, all you need to do is cut off the cable end connector and replace the it with one which fits your purpose.  Some sites sell the cables with just the…"

"Hi, Bryan,
You may avail yourself of the pre-configured add-ons like GPS, external compass, power/current sensors, gimbal controls, light controls, telemetry, and FPV OSD.  Or you may build and integrate your own devices because the code which…"

"Hi, Bryan,
I have not really looked into what you would need to write a custom program to control the APM or Pixhawk.  All I know is that the software for both controllers are open source so the code is available for you to look at to figure out how…"