Reviewer for Aircraft Powerplant in the Aeronautical Engineering board.
1
Types of Engines
| Engine | Principle |
|---|---|
| Piston (reciprocating) | Internal combustion drives propeller |
| Turbojet | Jet thrust from exhaust |
| Turbofan | Bypass fan, efficient |
| Turboprop | Turbine drives propeller |
2
How Jet Engines Work
The four steps: Suck, Squeeze, Bang, Blow — intake, compression, combustion, exhaust. Thrust follows Newton’s third law.
💡 Exam Hack
Thrust = mass flow × change in velocity of air. Faster exhaust = more thrust.
3
Engine Systems
Supporting systems include fuel, ignition, lubrication, and cooling. Proper maintenance prevents in-flight failure.
4
Thrust Principle
A jet engine accelerates a mass of air rearward; by Newton’s third law the reaction pushes the aircraft forward.
💡 Exam Hack
Turbofans are quieter and more fuel-efficient than turbojets thanks to bypass air.
📌 Quick Recap — Master These
Before your exam, make sure you can confidently explain and apply each of the following:
- Types of Engines
- How Jet Engines Work
- Engine Systems
- Thrust Principle
Re-read any section above where you hesitate.