Kilcullen Science and Engineering

Kilcullen Science and Engineering - Exploring Science, Engineering, and Technology

Friday, November 14, 2025

Gas Turbine Engines

Types of gas turbine engines. Created by ChatGPT.

Gas turbine engines are used in many applications, not just on aircraft. They power ships, tanks, helicopters and they're also sometimes used in power stations to drive alternators (AC generators) for generating electrical power. Gas turbine engines have been used to power trains in the 50s and 60s, e.g. the Union Pacific GTEL locomotive. A "jet engine" is a specific type of gas turbine engine where a jet is used to provide thrust. The jet can provide thrust directly (turbojet) or power a fan (turbofan engine) or propeller (turboprop). The advantage of a gas turbine engine is its high efficiency when scaled up and run at high power. At small scales (if they were used to power cars) they would be less efficient than a piston engine. Gas turbine engines also have a high power to weight ratio compared to a piston engine.
Thanks to ChatGPT for drawing a graphic for me.