turboshaft - meaning and definition. What is turboshaft
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What (who) is turboshaft - definition

TURBINE ENGINE OPTIMIZED TO PRODUCE SHAFT POWER
Turboshafts; Turbo-shaft; Turboshaft engine
  • Austin 250hp gas turbine, sectioned
  • Schematic diagram showing the operation of a simplified turboshaft engine. The compressor spool is shown in green and the free / power spool is in purple.

turboshaft         
¦ noun a gas turbine engine in which the turbine drives a shaft other than a propeller shaft.
Turboshaft         
A turboshaft engine is a form of gas turbine that is optimized to produce shaftpower rather than jet thrust. In concept, turboshaft engines are very similar to turbojets, with additional turbine expansion to extract heat energy from the exhaust and convert it into output shaft power.
Free-turbine turboshaft         
TERM
Free-turbine engine
A free-turbine turboshaft is a form of turboshaft or turboprop gas turbine engine where the power is extracted from the exhaust stream of a gas turbine by an independent turbine, downstream of the gas turbine. The power turbine is not mechanically connected to the turbines that drive the compressors, hence the term "free", referring to the independence of the power output shaft (or spool).

Wikipedia

Turboshaft

A turboshaft engine is a form of gas turbine that is optimized to produce shaftpower rather than jet thrust. In concept, turboshaft engines are very similar to turbojets, with additional turbine expansion to extract heat energy from the exhaust and convert it into output shaft power. They are even more similar to turboprops, with only minor differences, and a single engine is often sold in both forms.

Turboshaft engines are commonly used in applications that require a sustained high power output, high reliability, small size, and light weight. These include helicopters, auxiliary power units, boats and ships, tanks, hovercraft, and stationary equipment.

Examples of use of turboshaft
1. It is made by Sikorsky Aircraft and powered by three turboshaft engines.