Engine Pressure Ratio(EPR)
Definition
The ratio of turbine discharge pressure to compressor inlet pressure, used as a thrust indication on some turbofan engines. EPR directly relates to the thrust the engine is producing.
Why Engine Pressure Ratio Matters for Pilots
Understanding Engine Pressure Ratio is important for pilot certification exams and safe flight operations. This concept appears on FAA and EASA knowledge tests, and examiners may ask about it during oral checkrides. A thorough understanding of Engine Pressure Ratio helps you make better decisions in the cockpit.
Exam Tip
This concept is commonly tested in engines-related questions on FAA and EASA exams. Make sure you can explain Engine Pressure Ratio in your own words for the oral exam. Practice applying this concept to real-world scenarios, not just memorizing the definition.
Related Terms
Share this with a fellow pilot
Related Content
Eicas
Aviation glossary definition and exam tips.
Decision Height
Aviation glossary definition and exam tips.
Runway Incursion
Aviation glossary definition and exam tips.
ATPL Theory Complete Guide
Master every subject covered in airline pilot exams.
Free Practice Exam
Test your aviation knowledge with real exam questions.
Study Engine Pressure Ratio with Rotate
Unlock All Study Materials — $7.49/mo
1,800+ practice questions covering Engine Pressure Ratio and every exam topic. Flashcards, study guides, and progress tracking. 94% first-attempt pass rate.
Test your knowledge
Think you understand Engine Pressure Ratio? Challenge yourself with practice questions covering engines and all other exam subjects.
Try Free Practice QuestionsMore Engines Terms
Turbofan Engine
A gas turbine engine where a large fan driven by the turbine section produces mo...
Turboprop Engine
A gas turbine engine that drives a propeller through a reduction gearbox. Turbop...
Turbojet Engine
The simplest form of gas turbine jet engine where all thrust comes from the exha...
Piston Engine
A reciprocating internal combustion engine driving a propeller for aircraft prop...