At the Dubai Airshow this week, one of the most anticipated sights will be the Boeing 777X, Boeing’s new plane powered by the GE9X, the most powerful jet engine in the world. But thrust is just one of the engine’s many attributes. It’s also tough and the United Arab Emirates, a hot, desert country that also happens to be the base for two of the world’s largest airlines — Emirates and Etihad Airways — is an ideal place to talk about the engine’s brawn.