North American X-15 (Earth-21)

"How's my X-15? Hmm. Let's see. We've got 57,000 pounds force of thrust. Mach 6, like riding a rocket ship between your thighs. She's a beast."

- Larry Trainor and John Bowers

North American X-15 was an experimental aircraft designed by the United States Air Force and NASA designed for the Mercury space program.

Trainor's Test Flight
In 1961, Captain Larry Trainor of the United States Air Force was assigned to fly the North American X-15 designed for the Mercury space program to the upper atmosphere. During the test flight, Trainor successfully completed his mission, though was surprised by the sudden arrival of a blue glow of light. The blue glow was in fact a Negative Spirit from the Negative Nebula, which damaged the plane's controls and knocked Trainor unconscious. The plane soon fell and impacted on the ground, creating a notable explosion and burning the flesh of Trainor's body. However, Trainor was able to survive the crash as the Negative Spirit kept him alive, leading to his capture and experiments done by the Bureau of Normalcy.

Functions

 * Supersonic Flight: Unlike average fighter jets, the experimental X-15 had an exceptional 57,000 pounds force of thrust and was capable of reaching the high speed of Mach 6. The X-15 was also able to leave the atmosphere for brief periods of time, while keeping its pilot safe from the exterior vacuum of space.