Propulsion hardware in jet engines Identify the presence of a propeller in a pure jet engine configuration (turbojet).

Introduction / Context:
A pure jet engine (turbojet) produces thrust by accelerating a jet of exhaust gases through a nozzle, with no external propeller. Other engine types, such as turboprops, use a turbine to drive a propeller for thrust production.

Given Data / Assumptions:

• Configuration considered: turbojet (not turbofan, turboprop, or propfan).
• Thrust is predominantly from jet momentum, not propeller disk loading.

Concept / Approach:
Turbojets comprise inlet → compressor → combustor → turbine → nozzle. The turbine extracts just enough power to drive the compressor; remaining enthalpy accelerates the jet to produce thrust. No propeller is present in a pure turbojet.

Step-by-Step Solution:
Identify engine class: turbojet.Check thrust device: convergent (or convergent-divergent) nozzle, not a propeller.Conclude: “no propeller.”

Verification / Alternative check:
Aircraft using pure turbojets (historically many fighters) demonstrate zero propeller hardware; by contrast, turboprops explicitly feature a propeller driven by a free power turbine.

Why Other Options Are Wrong:

• Any option with a propeller describes turboprop/propfan or piston-prop configurations, not a pure jet.

Common Pitfalls:
Confusing turbofans (which have a ducted fan) with turbojets; a fan is not a propeller in the conventional exposed sense.

Final Answer:
no propeller