Right. Trying to draw fuel from an empty tank, even if other selected tanks are not empty, will set the out-of-fuel flag. What do multiple-tank fuel systems (a Cessna, for example) do when one tank runs dry? In fancy systems, trying to pump fuel out of an empty tank is a serious error.
Generally, the fuel system on high-wing plane like a Cessna is gravity fed (sometimes with a back-up pump), while the fuel system on a low-wing plane like a Piper or Beech is pump-driven. Only gravity-fed fuel systems have "BOTH" settings.
My Warrior has a mechanical fuel pump on the engine's accessory drive as well as an electric backup pump, which I turn on for startup and during takeoff and landing. In the worst case, I can always pump the primer by hand, though mine has lines into only three cylinders.
All the best,
David
_______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
