i am using 2800 mah for my tricopter,

motor: 1200 kv. max current 16 A  and for 3 motors 48 A

my tricopter is just rotating on the ground and not fllying. all the setting i have done correctly. i am using kk 2.1.5 board

guide me

my copter weights only 500 grams, but when i start it is just spining not flying what can i do....

specification 18 inch each arms, separated by 120 degree

my setting are

Roll/Pitch (Aileron/Elevator)

P Gain : 30
P Limit : 100
I Gain : 3
I Limit : 20

Yaw (Rudder)

P Gain : 30
P Limit : 20
I Gain : 3
I Limit : 10

Stick Scaling
Roll & Pitch : 50
Yaw (Rudder) :70
Throttle : 100

it is considerably rotating and not flying

Please guide me
Reply

Check whether if the numbers(Size of props) ON THE  PROPS is on upside.
Then see the orientation of kk 2.1.5, And with respect to this see if the motor layout is right or not. And the motor direction And props.
Hope you know about the fact that props can also be of two types cw and ccw 

It will be more easy to answer if you can post a video link

you say rotating right! are your propellers of proper rotation as required ?