Developed in the late 90s by the Engine Division Bangalore of Hindustan Aeronautics Limited (HAL) for DRDO’s Lakshya-1, a reusable target system Unmanned Aerial Vehicle (UAV). PTAE-7 turbojet engine rated at 3.7kN of thrust is presently getting a host of improvements in its new avatar so that it can be used as a powerplant for the upcoming CATS Warrior Unmanned Combat Drone in Twin engine configurations.

Upgraded PTAE-7 turbojet engine is getting new turbine blades, improved digital electronic fuel control system, hardened compressor sections and most important things of all a full authority digital engine control (FADEC) system to provide optimized performance and control that is expected from a modern turbojet engine before it can be used on the 1.3 tons CATS Warrior . PTAE-7 turbojet engine will also be made more maintenance-friendly and will have a higher Total Technical Life (TTL) and greater Time Between Overhauls (TBO).

PTAE-7 turbojet engine won’t be getting any afterburner section that HAL already has developed and tested to keep CATS Warrior weight in check, due to which 3.7kN of thrust per engine will remain the same even after these upgrades. 700kg Lakshya-1 was powered by a single PTAE-7 turbojet and it seems a 1.3-ton CATS Warrior will have adequate power in the Twin engine configuration of the same engine. CATS Warrior will cruise at subsonic speeds and will have a maximum speed of 0.9 Mach.

PTAE-7 turbojet engine also has emerged as the powerplant of choice that will be also used on the CATS Hunter Air-Launched Recoverable Cruise Missile that will team with the CATS MAX (Tejas Trainer Mother ship) and CATS Warrior but minus the FADEC system.

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