RE: 3W 106 sagging
77,
The answer is angle of attack. When inverted or upright the airplane has a slight positive angle of attack. This creats a slightly differntly airflow through the cowl in each aditude. The amgle is need to generate lift with a symetrical air foil.
Dave
[quote]ORIGINAL: kkling77
My next question is, what changes when the aircraft is inverted to cause the engine to run this way, yet be solved by running a vent line inside the fuse or taking the carburetor out of the slipstream?