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The ULA launchers use the Russian produced RD-180 engine
by danmaz74 11y ago
The ULA launchers use the Russian produced RD-180 engine
- avmich 11y agoOnly Atlas-V. Delta-IV uses American hydrogen engines (RS-68); however Delta-IV is rather more expensive than Atlas-V. Even though Atlas-IV is rather more expensive than Falcon-9 - which uses simpler, less performant but cheaper technology.