That means it is easier for planes with only two engines to strike a flock of birds and lose power in both engines.

VOA: special.2009.04.01

High levels of sulfur in diesel made from petroleum have meant diesel engines produce a strong smell.

VOA: special.2010.11.17

Captain Chesley Sullenberger reported that both of his plane's engines had struck birds.

VOA: special.2009.04.01

There were no special materials to block the noise of the engines.

VOA: special.2010.10.06

I asked one of the workers if he could start the engines.

VOA: special.2010.07.31

And it starts a new business. So they are the engines of economic growth throughout the world."

VOA: standard.2010.01.31

The volcano has sent a massive cloud of microscopic ash particles swirling across northern Europe - particles that air specialists say are highly abrasive and could cause aircraft engines to fail.

VOA: standard.2010.04.16

"When the skipper on the Ady Gil saw the Shonan Maru moving in to strike him, he put his engines in reverse to get out of the way, which probably saved some of his crew but it ripped the front end of the vessel off and caused catastrophic damage to the Ady Gil,"

VOA: standard.2010.01.06