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Stratolaunch and Sierra Nevada Corporation studied in 2014 launching a scaled-down version of Sierra Nevada’s Dream Chaser from Stratolaunch’s aircraft using an Orbital-developed launch vehicle.
Development work on Dream Chaser started at SpaceDev and Sierra Nevada Corporation won NASA funding through the agency’s commercial crew program to support its development.
NASA did not select Dream Chaser for crewed missions but awarded Sierra Nevada Corporation a contract in 2016 to use Dream Chaser for International Space Station cargo resupply services.
Mark Sirangelo had been with Sierra Nevada Corporation since the company’s acquisition of San Diego-based SpaceDev in 2008.
Dream Chaser is a lifting-body vehicle developed by Sierra Nevada Corporation that is based on NASA’s HL-20 design.
Under the CRS-2 contracts, Orbital ATK, SpaceX, and Sierra Nevada Corporation will transport 87,900 kg to the ISS on 21 missions for a projected cost of $6,310,000,000.
NASA paid Sierra Nevada Corporation $4,400,000 in CRS-2 integration costs to work on a Dream Chaser variant that can dock with the ISS even though initial Dream Chaser missions will be berthed using the station’s robotic arm.
Sierra Nevada Corporation plans to build a single Dream Chaser spacecraft for CRS-2 missions and intends to fly that vehicle up to 15 times.