When will the brake thermal fuse plugs release?

The brake thermal fuse plugs are designed to release at a specific torque threshold to prevent excessive heat buildup during operation, which can lead to tire damage or failure. In this case, the correct answer indicates that the fuse plugs will release at 8.1 million foot pounds.

When the thermal fuse plugs release, they help to mitigate the risk of overheating the brake system, which can result in flat tires due to the extreme heat affecting the integrity of tire materials. This release point helps ensure safety and performance by allowing for the proper function of the brakes without causing undue strain on the tires and preventing catastrophic failure.

The other values mentioned in the options represent torque levels that exceed the safe threshold where the brake thermal fuse plugs would effectively perform their safety function. By ensuring the release occurs at 8.1 million foot pounds, the system is designed specifically to prevent damage to tires and maintain operational safety under high-stress conditions.