On Feb 24, 8:06*pm, Clark wrote:
That said, how on Earth can fuel gauges be considered accurate? At the very
least one would have to specify attitude (which some gauges do but most
don't). Maybe there could be a calibration card for airspeed, weight, and
CG? Wouldn't that be fun?

The gauges are typically at least accurate enough to alert you to a
large leak, which is a warning that your flow calculations cannot give
you. That makes the gauges useful (and operable), in a limited but
important way, and explains why they're required for airworthiness.

As I have acknowledged, the flow calculations are typically much more
reliable than the gauges under NORMAL circumstances. That's fine--the
gauges are just one part of how you're supposed to keep track of your
fuel.