I had a bubble in my fuel line while bouncing through turbulence once and the engine stumbled briefly. The thing that kept it going was the wind blowing through the prop plus lowering the nose to keep the airspeed up. My compression ratio is about 6.6 to 1. That helps a lot.
-Joe >Is it possible to restart a VW engine by diving (I mean, make a steep dive >in order to increase airflow and possibly force the prop to windmill), or >is it a lost case?