RE: Rc airboats that go out of control
There are a few things that can be done to prevent lost of control due to a radio glitch. Tieing the batteries in the holder with either a tie strap or rubber bands. Useing a servo plug lock at the point where the batter holder plugs into the switch. Wraping the Rx with something to absorb viberation. Place the electronics in a radio box (water proof). Placing a blue paper shop towel in the radio box to absorb any water that may enter into the box. Test the system each and ever time you run, if you have any sign of weak batteries replace. Batteries can quickly die off after they become weak. Tie strap all of the wires to keep them away from as much as possible of the RX antenna wire. Inspect the boat for anything loose, anything that will let metal to metal rub.One of the main things to prevent is moisture from entering the radio sytem. Make sure that you are the only person running on your radio channel. High power electrical lines can also cause radio failure. The hardest thing is to not run if you find any sign of trouble, I have also crashed a boat from running when I knew better.
Good luck and Happy Boating