> I never get better than 6 gph. If we're doing touch and goes, etc. I may get 7 gph. I'm using tach time, is that right?
No. The tach "time" passes slower when the engine is running slowly and faster when the engine is running fast. A typical C85 tach should record one hour in one hour (i.e. be accurate) at 2500 RPM. Basically, if you go by tach time your fuel consumption will be almost the same regardless of engine speed. It will take a very long hour to burn all that fuel at 1800 rpm, however. Bottom line, measure gallons used verses actual elapsed time. John Cooper Skyport Services 518 797-3064 www.skyportservices.net
