Engines
Honeywell's Latest-generation Turboshaft to Power Defiant X
A state-of-the-art reworking of the trusted T55 engine will power the Defiant X, which is bidding to win the U.S. Army’s Black Hawk replacement program.
Two HTS7500s will power the Defiant X FLRAA competitor. The engine shares a structure with the proven T55. (Photo: Honeywell)
Two HTS7500s will power the Defiant X FLRAA competitor. The engine shares a structure with the proven T55. (Photo: Honeywell)

Honeywell’s HTS7500 turboshaft has been selected as the powerplant for the Lockheed Martin Sikorsky-Boeing Defiant X helicopter, which is a contender for the U.S. Army’s Future Long-Range Assault Aircraft (FLRAA) competition. Plans call for FLRAA to replace the service’s UH-60 Black Hawks from 2030.