GE Aerospace is what remains of General Electric after the historic conglomerate split itself into three focused companies, spinning off healthcare and energy. It makes jet engines with CFM International partner Safran that power most of the world's narrowbody fleet, plus engines for widebodies and military aircraft. The economics resemble razors and blades: engines sell near cost, and decades of spare parts and service contracts on the installed fleet produce the profit. Few industrial franchises enjoy demand visibility this long.