Three spool gas turbine engine having a clutch and compressor bypass

This is a complex gas turbine engine designed for adaptability. It features three main rotating shafts and a fan with two stages that can spin in opposite directions, where one stage can be selectively engaged or disengaged with a clutch. The engine also includes a system to bypass air around its highest-pressure compressor.

Why it matters: The demand for highly fuel-efficient and multi-mission capable aircraft engines has intensified significantly since 2009. Advances in high-temperature materials and sophisticated engine control systems could now make the complex adaptive features, like the clutched counter-rotating fan and compressor bypasses, more practical and reliable to implement.

Status: Not in forceListed as no longer active. The specific reason is not in the record we hold.
How hard to build: SpecializedHigh-temperature alloys, precision machining, complex controls.

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