Wiktionary
n. A gas turbine engine designed to transmit power by means of a geared shaft, used in helicopters and for land and marine vehicular and stationary applications.
Wikipedia
A turboshaft engine is a form of gas turbine which is optimized to produce shaft power 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.
Usage examples of "turboshaft".
Umesh aimed the optical sighting and tracking device of his SA-7b missile on the right turboshaft exhaust of the large American helicopter.
After refueling, the two Aerospatiale Gazelle utility helicopters closely followed the vegetation-rich flatlands surrounding the Euphrates, each under the power of a single turboshaft, which enabled the Iraqi craft to carry two pods of Matra 68mm rockets and two 7.
At a small farm outside Montserrat, twenty miles northeast of San Kristobal, the high-pitched whine of turboshaft engines rolled along the Rio Llobregat, the sound gliding along the smooth, lead-colored water.
High overhead, a shrill whoop of triumph clapped off the turboshaft walls.
Stallion suddenly lurched to the right, the turboshaft engine coughing.
If he could only set the big chopper down before the turboshaft crapped out on him!
Above them, the rotors were hammered through the cold arctic air by two turboshaft engines, the thudding blades flickering past the pale sunlight like a strobe.
Brewster had replaced the gearbox with high-power alternators and a turboshaft engine, mounted vertically.
These structures masked the exhaust emissions of the twin turboshaft engines and shielded them from the infrared sensors of hostile missiles.
Ultraviolet is emitted principally from the air intake ports of the Isotov TV3-117 turboshaft engines.
He was still recovering his breath when the two Rolls Royce Gnome turboshaft engines fired into life.
The bellhop, waiting at the turboshaft for the Vator to come back, threw her a curious glance.
Hollis recognized the shape as that of the Mi-28, a six-seat passenger craft with a jet turboshaft, somewhat like the Bell Jet Ranger.
The sign revealed he was beside Turboshaft 3, which told him exactly how far away his Infirmary was.
E deck, then trudged from the turboshaft toward the port-side rim, where his quarters awaited him.