What happens when a tank is 50 pounds above the lower tank in automatic cross-flow?

When a tank is 50 pounds above the lower tank in an automatic cross-flow system, fuel transfer will stop. This is because the system is designed to manage the flow of fuel based on pressure differentials between tanks. In automatic cross-flow operations, when the pressure differential reaches a specific threshold, typically indicating that the upper tank has sufficient weight, the transfer process is halted to prevent overfilling or potential spillage from the lower tank. Maintaining proper fluid dynamics is crucial for safety and efficiency in fuel management systems. Therefore, when one tank is significantly heavier, the automatic cross-flow mechanism recognizes that it's no longer advantageous to continue transferring fuel, leading to the cessation of flow.