Yes, I made myself unclear.
I was saying that we should make sure the fuel doesn't flow by gravity from the tank to the carb, otherwise it could happen alone without the engine running and make a mess, flood the carb, wet the plug and put fire when starting the engine, so on. Then I suggested to add a fuel line switch to cut the line when not flying.
If the tank is going to be below the carb when flying inverted, it would also happen in the suggested configuration for a normal fligh(tank below carb).
1)Wouldn't it also kill the engine, following the same thought?
2)Isn't the vacuum from the engine enouth to suck the fuel?
3)Is there any rule of thumb about this maximum diference in level that the engine can suck?
4)What about using pump?How it works?

I'm getting confused here![&o]

Nilo