Launch probability: 0%

Failure reason: Pitch and roll sequence failed to initiate.

Uncrewed test flight of the Mercury program. The launch proceeded normally until about T+20 seconds when the pitch and roll sequence failed to initiate and the vehicle instead just continued flying straight upward, requiring early termination of the flight.

Mission type: Test Flight · Orbit: Suborbital

Rocket: Atlas LV-3B · Provider: National Aeronautics and Space Administration