Secret Warplanes of Area 51

Special-Ops Infiltrator

The Vehicle: Vertical-takeoff-and-landing aircraft for transporting special-ops forces to hostile areas
The Technology: Blended-wing-body design with six jet engines powering lift fans and providing forward thrust
The Evidence: Patent filings, obvious gap in current arsenal, recent development of key technology

Recon Platform

The Vehicle: Unmanned flying-wing capable of long-duration surveillance flights, measured in days and weeks instead of hours
The Technology: Autonomous flight controls and ultra-efficient electric motors powered by solar panels or fuel cells
The Evidence: Patent filing, clear current need, recent development of key technology

Invisible Fighter

The Vehicle: Stealthy, unmanned combat aerial vehicle
The Technology: Visual stealth, including active fuselage lighting that blends into background
The Evidence: Patent filing, development of key technology, obvious gap in current arsenal

On-Time Delivery

The Vehicle: Aurora Mach 6-plus attack aircraft

The Technology: Ramjet-powered delta wing
The Evidence: Telltale sonic booms; unconfirmed sightings; unresolved history of long-rumored program; recent development of key technology; large, unexplained current budget allocation