Pilots rev up engines before takeoff, but why? The answer lies in a fascinating dance of air, fire, and spinning blades.
Modern Engineering Marvels on MSN

Why can an MD-11F lose an engine on takeoff?

The MD-11’s three engines were meant to make “one engine out” a manageable problem; an engine leaving the airplane is ...
At first glance, a twin-engine aircraft looks a whole lot safer than a single-engine one. After all, if you lose an engine, you still have another to keep you flying in the air, right? This isn't ...