SpaceShipTwo makes a spectacle of itself in “Cold Flow” test

SpaceShipTwo makes a spectacle of itself in “Cold Flow” test:

Just a week after the first in-flight venting of its nitrous system, Virgin Galactic’s SpaceShipTwo has made an even more spectacular step on the way to its first powered flight. The craft's 25th glide flight on April 12 saw oxidizer flow through the craft’s propulsion system and expelled through the nozzle at its rear in what is known as a “Cold Flow” procedure...
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