ORIGINAL: LLD
Do you have the antenna pulled out next to the plane with a fully charged battery? Don't do this... Leave the antenna down when working on the plane in the house... Pull it out when your getting ready to fly...
Larry
This is a good point. I had forgotten about this phenomena with some 72mhz radios when both antennas are fairly close together though I don't remember throttle position affecting that. It would do it with engine off.
I think the OP has us all confused by the thread description. Flutter happens while the plane is flying which this plane has not flown.