Which type of gas turbine engine is most commonly used in non-aviation applications?

The turboshaft engine is most commonly utilized in non-aviation applications due to its design and operational characteristics that suit a variety of industrial and commercial needs. In essence, turboshaft engines are optimized to deliver mechanical power rather than thrust, making them ideal for applications such as powering helicopters, marine vessels, and power generation facilities.

These engines feature a configuration that allows them to harness energy from combustion gases efficiently and convert it into rotational energy, which can easily be harnessed to drive rotors, turbines, or generators. The versatility and efficiency of turboshaft engines in converting fuel energy into useful work are key factors in their widespread application outside of aviation.

In contrast, turbojet, turbofan, and turboprop engines primarily focus on producing thrust for aircraft propulsion, and their designs and operational capabilities are tailored specifically for that purpose. This specialization limits their use in non-aviation scenarios compared to turboshaft engines, which have a broader application range in industries that require mechanical power.