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X-4

Continuing The Hawk's tradition of flying swiftly and unbeatibly quick on just liquid fuel, the X-4. The Aerodynamic Nose Cone on the front of the X-4 may look ridiculous, but you mustn't be fooled. The X-4 is capible of speeds execeeding 1700.0 m/s on solely air-based propellant.

Notes:
Top speed recorded: 1700.1 m/s
Top speed screenshotted: 1700.0 m/s
Advanced Cardinals may break
Warranty void if used