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Williams FJ44-4M engine selected to power M-345 HET trainer

Italian Alenia Aermacchi has selected Williams International FJ44-4M jet engine to power its new M-345 HET (High Efficiency Trainer) trai...

Italian Alenia Aermacchi has selected Williams International FJ44-4M jet engine to power its new M-345 HET (High Efficiency Trainer) trainer jet.


The 3400 lbs thrust FJ44-4M is an aerobatic version of FJ44-4A engine which is used in light business jets. It is a modern two–spool co–rotating turbofan engine with medium bypass ratio, mixed exhaust, and high cycle pressure ratio.
The M-345 HET is the latest variant of the M-345 military trainer aircraft featuring lower operating and acquisition costs.

First flight is scheduled for 2015,with entry into service with Italian Air Force at the end of 2017.

The M-345 HET will feature enhanced performance, design load factors of +7/-3.5 g with high fatigue life, reduced fuel consumption and maintenance, state-of-the-art digital avionics and embedded training simulation capability, HUD (Head Up Display) in the front cockpit, a HUD repeater in the rear cockpit, three Multi-Function Displays in each cockpits, HOTAS (Hands On Throttle-And-Stick) controls and considerable light attack capabilities.

The new trainer is expected to replace Italian Air Force MB.339A fleet and will also re-equip its famous “Frecce Tricolori” aerobatic team.