If flying cross country, both tanks are topped off. Three hours of fuel minimum. Reality being closer to 3.5 hours.
You want to be a little careful with that premise Bill...I've seen Birdie burn 10 GPH...one time when I helped Doug take the Cherokee up into WA to B.A.S. for the inertial reel seatbelt installation. It surprised the heck outta me, so I leaned more on the follow-up trip a few weeks later but had a similar fuel burn. This was running at 2700 RPM. I've never had that rate of burn before or since. Can't explain it. BUT... 2 GPH above normal could eat up a guy's planned reserve in my case, expecting 5 hours endurence and have the tanks run dry at 4 hours.
