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X-38 Program Objectives and Requirements

Phase 3 - Two full scale, approximate X-24A shaped vehicles to be launched from the DFRC B-52 on the Edwards Air Force Base test range. One of the vehicles will have fixed control surfaces; the second aircraft will have both an autonomous free-flight control system with movable aerodynamic surfaces, and parachute controls.

  1. Demonstrate deployment, autonomous flight, and landing flare capability of a parafoil/payload system with a wing loading of 2.0 pounds per square foot.

  2. Assess the aerodynamics and stability and control of the free-flight vehicle.

  3. Evaluate the initial control laws and mechanization for stability and control and energy management.

  4. Evaluate the touchdown dynamics of the full-scale vehicle/parachute combination.

  5. Measure stability and control of the full-scale vehicle/parachute combination.

  6. Demonstrate integration and operation (including guidance) of the Guided Precision Aerial Delivery System (GPADS) parachute recovery system.

  7. Continue assessment of parachute system reliability.

  8. Expand the parachute deployment envelope.


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