Bored Midwesterners are putting the polar vortex to the test this week, challenging whether or not the current temperature in their area is cold enough to instantly freeze a pot of boiling water. They ...
SAN FRANCISCO — Orbital Technologies Corp. (Orbitec) announced Oct. 25 the first successful flight test of its Vortex liquid rocket engine, which is designed to serve as a new upper stage for the ...
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