[1bwana1]

3ddd,
The issue is not the radio, it is the receiver. I believe the receiver cpu will re-boot at voltages lower than 4.7 v. When this happens it takes between 4 and 10 seconds before you re-gain control of the plane. This is a long time, and will most often result in the loss of the plane. When you are using a lot of high torque servos it is very easy to draw the voltages down this low if you don't design a system to make sure it doesn't happen.