Big Kev
24th Oct 2004, 12:34
Hello Everyone,
I'm a student pilot in training at the moment and my instructor and books tell me to lean the mixture on climb through altitude due to the air density decreasing.
But my book says that fuel drawn into my fuel injected engine is determined by how much the throttle valve is open which then determines the air flowing through the venturi which then determines the amount of fuel drawn out.
Because there is less air at altitude, I would of thought that if the throttle valve is left in the same position at altitude as it was at sea level, then the amount of fuel being drawn out would automatically decrease due to the less volume of air passing through the venturi, which in turn would have a decreased pulling effect on fuel through the venturi system, thus in effect causing its own leaning!
Could someone who knows this topic well please correct my understanding? - thanks in advance.....
BK
I'm a student pilot in training at the moment and my instructor and books tell me to lean the mixture on climb through altitude due to the air density decreasing.
But my book says that fuel drawn into my fuel injected engine is determined by how much the throttle valve is open which then determines the air flowing through the venturi which then determines the amount of fuel drawn out.
Because there is less air at altitude, I would of thought that if the throttle valve is left in the same position at altitude as it was at sea level, then the amount of fuel being drawn out would automatically decrease due to the less volume of air passing through the venturi, which in turn would have a decreased pulling effect on fuel through the venturi system, thus in effect causing its own leaning!
Could someone who knows this topic well please correct my understanding? - thanks in advance.....
BK