turboshaft

noun

tur·​bo·​shaft ˈtər-bō-ˌshaft How to pronounce turboshaft (audio)
: a gas turbine engine that is similar in operation to a turboprop engine but instead of being used to power a propeller is used through a transmission system for powering other devices (such as helicopter rotors and pumps)

Examples of turboshaft in a Sentence

Recent Examples on the Web
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The company revealed that Duality is being designed to separate the propulsion units from the turboshaft engine by using electric motors. Prabhat Ranjan Mishra, Interesting Engineering, 22 Aug. 2025 Its turbofan and turboshaft engines will give it a maximum speed around 450 knots (518 mph / 834 km/h). New Atlas, 8 Oct. 2024 Relentless will be the largest commercial model in the Bell family, with capacity for 16 passengers and two pilots, and will reportedly be able to cruise at 184 mph for a range of 667 miles, with twin GE turboshaft engines providing redundancy. Basem Wasef, Robb Report, 11 Feb. 2024 This twin-hull, low-wing design with 12 turboshaft engines is more like DARPA’s original concepts and is optimized for on-water stability and seakeeping. IEEE Spectrum, 14 Feb. 2023 Unlike the 212, the Huey II remains a single-engine helicopter powered by a Honeywell T53-L-703 turboshaft engine with 1,800 shaft-horsepower. Eric Tegler, Forbes, 23 Dec. 2021 The new engines that replace the 4,500-hp Pratt & Whitney JFTD-12 turboshafts of the current helicopter are sourced from an as yet unnamed manufacturer. Eric Tegler, Popular Mechanics, 9 Mar. 2020

Word History

First Known Use

1958, in the meaning defined above

Time Traveler
The first known use of turboshaft was in 1958

Cite this Entry

“Turboshaft.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/turboshaft. Accessed 10 Sep. 2025.

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