SpaceX is superb at reusing boosters, but how about building upper stages?
With the launch Friday and another Falcon 9 flight Monday (this one with a booster on its 15th mission), SpaceX has launched ...
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Counting Down To The Final Atlas Rocket
The Vulcan will use larger versions of the GEM-63 SRBs currently flying on the Atlas V, mounted in symmetrical pairs; a departure from the unique asymmetrical booster arrangement used previously.