AVM Powerplant Practice Test

The rearward thrust capability of an engine with the thrust reverser system deployed is:

Less than its forward capability Greater than its forward capability Equal to its forward capability Unchanged by reverser deployment

Correct Answer:

Less than its forward capability

Explanation:

When a thrust reverser is deployed, part of the engine’s exhaust is redirected forward to create a braking force. That reverse thrust is useful for slowing the aircraft, but it is not as strong as the engine’s normal forward thrust. The reverser path introduces losses: the flow is diverted through additional hardware (blocker doors, cascades, etc.), it mixes with cooler air and experiences more turbulence, and the overall propulsion system isn’t optimized for producing as much thrust in the reverse direction. Because of these inefficiencies and design limits, the rearward thrust achievable with reversers is less than the engine’s forward thrust in normal operation.

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