These hydrogen engines burn fuel in the same manner that gasoline engines do.

This substantially increases the lubricating oil consumption in a four-stroke hydrogen engine.

On the other hand, hydrogen engine conversion technology is more economical than fuel cells.

Watch this video about the development of hydrogen engines for the industrial age on HowStuffWorks.

See how hydrogen engines work in this video from World Business Review.

And the photon reactor and the hydrogen engines even more.

The hydrogen engine which powered the Folly bad roots in the early space program.

Who really stands to lose from the hydrogen engine, old pal?

Get paid off in billions and pretend there never was a hydrogen engine.

It would gulp fuel, though, and the hydrogen engines would heat.