I see some back of the napkin calcs happening here, and feel compelled to point out that in addition to in-flight fuel, current regs require planes to have rese

I see some back of the napkin calcs happening here, and feel compelled to point out that in addition to in-flight fuel, current regs require planes to have reserves sufficient to: * maintain a holding pattern for 30 minutes (45 for recip. engines) PLUS * perform a missed approach at destination, climb out again, and perform a landing at an alternate PLUS * contingency fuel (5% of trip fuel)