A little imagery from CCDC Aviation & Missile Center's
Twitter account
If I were to guess, I would assume this is part of the
test program of the CH-47 powered by the CH-53K's GE T408 engines
While I am intrigued by the possibility of a CH-47 with significantly increased lift capacity and airspeed. I also have to acknowledge the likelihood that increase of performance will include the drawback of increased fuel consumption. As they have basically maxed out available fuel storage space in the Block 2 fuel system modifications, they're either going to need make some serious structural mods, or accept reduced range/operating times
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