Which ECS systems utilize engine bleed air?

The correct choice focuses on the systems that rely on engine bleed air in the T-6A's Environmental Control System (ECS). In this aircraft, engine bleed air is harnessed to perform multiple critical functions, including defogging the canopy, heating the cockpit, maintaining canopy pressurization, and regulating the Anti-G system, which helps the pilot withstand high G-forces by providing adequate pressure.

Defogging is essential for visibility, particularly under humid conditions, as it involves directing warm, dry air onto the canopy to prevent condensation. Cockpit heating is necessary for comfort and to ensure that pilots can operate effectively in colder environments. Canopy pressurization is vital for maintaining clear visibility and ensuring that the cockpit remains at a proper pressure level during flight.

Additionally, the Anti-G system employs bleed air to create pressure in the suit worn by the pilot, which counteracts the effects of increased G-forces during maneuvers. Pressurization helps ensure that the cockpit environment remains safe and comfortable at different altitudes.

Together, these systems demonstrate the critical role that engine bleed air plays in the ECS, making this option comprehensive in identifying the various subsystems that utilize it. The other choices either omit one or more of these systems or incorrectly