Two technicians watch carefully as cables prepare to lift a J-2 engine into a test stand. The J-2 powered the second stage and the third stage of the Saturn V moon rocket. The towering 363-foot Saturn V was a multi-stage, multi-engine launch vehicle standing taller than the Statue of Liberty. Altogether, the Saturn V engines produced as much power as 85 Hoover Dams.
NASA
<a rel="nofollow" class="external free" href="http://mix.msfc.nasa.gov/IMAGES/MEDIUM/6522907.jpg">http://mix.msfc.nasa.gov/IMAGES/MEDIUM/6522907.jpg</a>