....could be plugged in wrong.

Channel 1 = Right-hand rear "aileron" servo
Channel 2 = Forward "elevator" servo
Channel 6 = Left-hand rear "pitch" servo


nah - that doesn't sound like the issue...

that deeper humming sound has me stumped. Are you sure your hub/main shaft pin is in one piece?

What about too much pitch....that would cause a deeper sound and prevent lift.

Pinion to main gear too tight....not sure about the sound but increased friction might prevent enough head speed.

If you followed bdavidsons instructions well, that model should fly.

Other than that, the main motor could be bad. I had one that completely froze up...got hot cause my gear mesh was too tight. It was making some strange noises before it froze up.

or like mentioned above, the main motor is pluged into the tail motor 4 in 1 plug...."jumps up when moving the rudder stick"