This three-engine test again sets the record as the most powerful test yet on the towering 235-foot tall test stand. A total of nine Merlin 1C engines will power the Falcon 9 rocket.

The test series continues with the addition of two engines for a total of five, then finally the full complement of nine engines. With all engines firing, the Falcon 9 can generate over one million pounds of thrust in vacuum - four times the maximum thrust of a 747 aircraft.

"The incremental approach to testing allows us to closely observe how each additional engine influences the entire system," said Tom Mueller, Vice President of Propulsion for SpaceX. "This ensures that we obtain as much data, knowledge and experience as possible as we approach the full nine engine configuration. To date we have not encountered any unexpected interactions between the engines."

The Merlin 1C next generation liquid fueled rocket booster engine is among the highest performing gas generator cycle kerosene engines ever built, exceeding the Boeing Delta II main engine, the Lockheed Atlas II main engine, and on par with the Saturn V F-1 engine. It is the first new American booster engine in a decade and only the second American booster engine since the development of the Space Shuttle Main Engine thirty years ago.

The first Falcon 9 remains on-schedule for delivery to the SpaceX launch site at Space Launch Complex 40, Cape Canaveral, Florida, by the end of 2008.

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