RS1 is ABL Space Systems' first orbital rocket. RS1 is an expendable small-satellite launch vehicle, targeting 1.35 tons of payload to low Earth orbit. Both stages are powered by ABL's internally-developed E-2 rocket engine. A major design objective is to support containerized, low-infrastructure launches, in which the vehicle and its associated support equipment can be transported to an essentially empty unprepared plot and conduct a launch. This capability is desirable for national security launches to provide assured access to space even in scenarios where typical launch sites are destroyed.

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