Boeing X-51A WaveRider Reaches Mach 5.1 How fast is Mach 5.1? It’s a world record. According to reports, the Boeing X-51A WaveRider cruiser traveled over 426 kilometers in just over 6 minutes. Wow! Facebook Prev Article Next Article Military Checkout these cool gadgets... Related Posts Air Rifles Are NOT Harmless TALOS is a Real-Life Iron Man Suit That Gives Soldiers Super-Strength GM unveils Silent Utility Rover Universal Superstructure Shoot Around Corners with Google Glass Bullet Proof Mask Shooting 2500 Yards, 1.43 miles or 2.3km!