Where are internal fuel tanks on helicopters usually located?

Internal fuel tanks on helicopters are typically located under the cargo floor due to several design and safety considerations. Placing the fuel tanks in this position helps maintain the helicopter's center of gravity and allows for better weight distribution, which is crucial for flight stability and performance. This configuration also reduces the risk of damage in the event of a crash or hard landing, as the tanks are shielded from external impacts.

Furthermore, this location aids in easy access for maintenance and inspection while keeping the fuel tanks away from areas typically occupied by passengers or crew, thereby enhancing safety by mitigating the risk of fuel exposure in the event of a leak.

In contrast, placing fuel tanks in the wings, above the cockpit, or in the tail section presents challenges regarding weight distribution, accessibility, and safety that generally make these options less preferable for helicopter design.