I have a new Cub and on the 600mi and 10hr+ flight home the average fuel burn was under 3.5gph. I am concerned this seems very low and maybe the engine is running much too lean. Does this seem like a low fuel burn?
The pilot that flew it home varied power settings from 2000rpm up to 2150rpm to see how it did. But even on the legs of 2150rpm cruise power fuel burn was about 3.5gph.
The engine has a Stromberg carb with no mixture control. I have flown the plane a little, as well as two other pilots. No reports of rough running engine or the engine missing.
Any thoughts on the situation? The only thing that immediately comes to my mind is maybe the tachometer is off. It does hit 2300rpms with full power on takeoff.
The pilot that flew it home varied power settings from 2000rpm up to 2150rpm to see how it did. But even on the legs of 2150rpm cruise power fuel burn was about 3.5gph.
The engine has a Stromberg carb with no mixture control. I have flown the plane a little, as well as two other pilots. No reports of rough running engine or the engine missing.
Any thoughts on the situation? The only thing that immediately comes to my mind is maybe the tachometer is off. It does hit 2300rpms with full power on takeoff.
