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Where dry lakebeds make runways miles long, America built aircraft to answer dangerous unknowns. The X-1 broke the sound barrier; the X-15 hit Mach 6.7, glowing from friction heat.
Experimental flight is “what if?” asked at 700 mph and graded in telemetry. Our X-Planes collection is built for that mindset: fly the hypothesis.
The X-15 flew so high that eight of its pilots earned astronaut wings — without ever riding a rocket off a launchpad.
At Mach 6.7, friction heated the X-15's nickel-alloy skin past 1,200°F — hot enough to glow cherry red in flight.
X-planes never took off. They were carried to 45,000 feet under a mothership's wing and dropped like a dart.
