During the fifteen-second interval takeoff, what is the wingman required to do after releasing the brakes?

The correct choice of checking engine performance after releasing the brakes during the fifteen-second interval takeoff is crucial for ensuring the aircraft is operating correctly and safely. This step involves monitoring the aircraft’s engine parameters, such as RPM, temperature, and pressure, to verify that everything is functioning within normal limits.

This procedure helps in identifying any immediate issues that might arise from an engine failure or malfunction, allowing for quick decision-making and appropriate actions to ensure safety during the critical phase of takeoff. Monitoring engine performance at this stage is vital because it provides the pilot with enough information to assess whether they can proceed with takeoff or if they need to abort the procedure.

The other options do not align with standard protocols during this phase of flight. Climbing to altitude immediately, maintaining altitude only, or reducing power to idle would not be appropriate actions at this point and could compromise safety, as they do not focus on confirming the engine's operational status before proceeding with the flight.