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New Delta 4 Engine Clears Series of Hot-fire Tests

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Pratt & Whitney Rocketdyne successfully completed a series of hot-fire tests of its new RS-68A engine that will eventually power the United Launch Alliance-built Delta 4 launch vehicles, according to a Nov. 22 Pratt & Whitney press release.

Launch DeltaMissions
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Delta 2 Lofts Italy’s Final Cosmo-SkyMed Satellite
1st GPS 2F Satellite Launched on Delta 4

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