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Virgin Galactic completes transonic glide test

According to Virgin Galactic, the Unity flew with water ballast equivalent in weight to the fully fueled hybrid liquid/solid rocket motor that will one day propel the vehicle into space on a suborbital trajectory. As on previous flights, the ballast was jettisoned at 22,000 ft to simulate the weight of a returning spacecraft. This allows the test program to not only simulate the conditions of ascent, but also of landing.

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