This week in Edwards history

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  • By 412th Test Wing Public Affairs
EDWARDS AIR FORCE BASE, Calif. --  On June 6, 1959, the first ground test of Thiokol’s XLR-99 liquid fueled rocket engine for the X-15 took place at the Static Test Stand.  Delivering 50,000 lbs of thrust at ground level, it was the most powerful and complex throttleable rocket propulsion system in the world.