As per aviation rules, “...the aircraft fuel gauge must indicate the quantity of usable fuel in each tank during flight.” Let us see what this is achieved.

One would assume that an aircraft fuel gauge would be somewhat identical to that of a car. In some respects you would be right. But there are some fundamental difference between what happens in a car verses what happens in an airplane that makes reading fuel levels in an airplane quite complex and complicated.

Here are the differences:

1. A car has only one fuel tank whereas, an aircraft has a three or more fuel tanks.
2. A car has one engine where as an aircraft has a minimum of one engine.
3. The fuel density in the car remains steady whereas in an aircraft, it can fluctuate w ... Read more »