Supercharge Your Career: 2026 Power Plant & Fuel System Exam Challenge!

The key idea here is how fuel capacity is stored without compromising balance and space. Four fuel tanks placed under the cabin floor give enough usable capacity while keeping the center of gravity stable as fuel is burned. Their symmetric, banked arrangement allows balanced fuel draw from all tanks, reducing CG shifts during flight. This layout also provides redundancy and keeps the fuel system compact and protected inside the fuselage. If there were fewer tanks, you’d either lose range or have to rely on larger tanks elsewhere, and more tanks would add unnecessary weight and complexity. So four tanks under the cabin floor is the right design choice for capacity, balance, and safety.