[Alan Roehrich]

Also, check your battery (or batteries) and cables VERY closely. If a battery has a loose plate, the "bounce" will cause it to short out or open intermittently. The "bounce" on landing is also likely to make every connection in the car try to move, so if one is weak, it will move.

By the way, if the battery has dual connections (top and side posts) be aware that those connections should be checked carefully as problems will hide there. Check ALL of your ground connections.