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VSS Enterprise PF04

Powered Flight 4 of Scaled Composites’ VSS Enterprise departed Mojave Air and Space Port beneath WhiteKnightTwo on October 31, 2014. About 13 seconds after airborne release, premature feather unlocking led to uncommanded feather extension and aerodynamic overload; the vehicle broke up near Koehn Dry Lake. Co-pilot Michael Alsbury was killed and pilot Peter Siebold was seriously injured.

VSS Enterprise PF04
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Identity

Aliases
SpaceShipTwo PF04Powered Flight 4N339SS
Name
VSS Enterprise PF04
Status
failed

Details

Astronauts
Description
Powered Flight 4 of Scaled Composites’ VSS Enterprise departed Mojave Air and Space Port beneath WhiteKnightTwo on October 31, 2014. About 13 seconds after airborne release, premature feather unlocking led to uncommanded feather extension and aerodynamic overload; the vehicle broke up near Koehn Dry Lake. Co-pilot Michael Alsbury was killed and pilot Peter Siebold was seriously injured.
End Date
2014-10-31
Launch Site
Outcome
Failure - In-flight breakup
Programs
-
Start Date
2014-10-31
Vehicle Families

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Creation Time
April 26, 2026 at 15:30:58 UTC
Updated Time
August 22, 2026 at 06:48:46 UTC

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Affiliations
Space Stations
-
Vehicles