Airbus has expanded the A380's flight envelope to an altitude of 43,000ft (13,100m) and a speed of Mach 0.89 during the initial phase of flight testing. The first series of stalls has been completed, ...

It’s a common phrase meaning “to go beyond the usual or normal limits by doing something new, dangerous, etc.” But why does “pushing the envelope” mean this? The answer lies not in mail but in ...

Scaled Composites' Model 437 Vanguard returns to flight, expanding its envelope ahead of Northrop Grumman's Beacon autonomy flight testing. The Scaled Composites Model 437 Vanguard has resumed flight ...

Will the new B-21 stealth bomber effectively carry and release weapons? Will its next-generation stealth technology keep its infrared (IR) signature low and help it evade complex air defenses? Will ...