I am having some major problems and was hoping that someone can please help me determine what is wrong and give me more direction on what else to check. I have my quad setup setup with APM2.5 and ArduCopter 3.1.2. Trying to do my maiden flight but cannot get the quad off the ground. Not sure what the problem is. I have gone through all the normal calibrations (Radio, Accelerator, Compass, ESC, etc). I am able to arm my APM and apply throttle. Even at full throttle, the quad will not lift off the ground. Verified that all motors are spinning the correct way (while on ground I am able to confirm that roll, pitch and yaw is correct with stick inputs). Thing just doesnt want to lift off ground. I believe that I have a good thrust to weight ratio with my Motor/Prop combo compared to weight. I have not changed any of the default gains in Mission Planner. Have not changed any of the default gains for the Autopilot. My full power throttle PWM is approx 1891. Thought that I should be getting lift at approx 50% power.
Here is my quad configuration:
Weight: 1700 kg
Frame: Carbon Fiber Talon V2
Motors: NTM 28-36 1000kV Brushless Motors
Props: 12in x 4.5
ESCs: 30A Afro w/ SimonK Firmware Update
Battery: 3s, 2700mA
Autopilot: APM 2.5 w/ Ardupilot 3.1.2
Any help and direction would be much appreciated. Thank you in advance!